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Diniz MCC, de Moura F, Machado Y, Coelho Neto J, Piccin E. A simple, quick and non-destructive approach for sampling drugs of abuse in tablets and blotter for qualitative analysis by paper spray mass spectrometry. Anal Methods 2023; 15:6259-6265. [PMID: 37955245 DOI: 10.1039/d3ay01393f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
This study presents the development of a simple, fast, and inexpensive approach for the direct analysis of new psychoactive substances (NPS) in seized tablets and blotter paper, with improved sample preservation and increased analytical frequency. Paper triangles were gently rubbed against the surface of the samples containing synthetic drugs and then subjected to analysis by paper spray ionization mass spectrometry (PS-MS). Seized samples containing lysergic acid diethylamide (LSD) and several other substances from the classes of amphetamines, N-benzyl-substituted phenethylamines, synthetic cathinones, and synthetic cannabinoids, were analysed. Three types of paper were tested (filter paper, blotter paper, and synthetic paper) and several combinations of spray solvents were studied for the optimization. All samples were weighed and photographed before and after sequences of analysis in order to attest to the sample preservation. The results revealed that the approach is excellent for sample preservation, with less than 5% of mass loss even after 27 consecutive analyses. Moreover, no significant signal decreases were observed in mass spectrometry (MS) even after the experiments. It was possible to unequivocally identify illicit substances from seized samples (pills and blotter paper). By overcoming the solubilization and wet extraction process used for sample preparation, the waste was restricted to a volume of only 10 μL of solvent for the PS-MS analysis. The main advantage of our approach over existing methods is the sample preparation, which is simple and quick since the samples are just rubbed against the PS paper. This brings enormous benefits in terms of analytical frequency, economy of time and low consumption of solvents. Another important point is that the sample can remain intact for further analysis, which is crucial in forensic analysis.
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Affiliation(s)
- Mariana C C Diniz
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Antônio Carlos Ave., 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Fabiana de Moura
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Antônio Carlos Ave., 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
- Departamento de Química, Centro Federal de Educação Tecnológica de Minas Gerais, Amazonas Ave., 5253, CEP 30421-169, Belo Horizonte, Brazil
| | - Yuri Machado
- Seção Técnica de Física e Química Legal, Divisão de Laboratórios, Instituto de Criminalística, Superintendência de Polícia Técnico-Científica, Polícia Civil de Minas Gerais, Augusto de Lima Ave., 1833, CEP 30110-017, Belo Horizonte, MG, Brazil.
| | - José Coelho Neto
- Seção Técnica de Física e Química Legal, Divisão de Laboratórios, Instituto de Criminalística, Superintendência de Polícia Técnico-Científica, Polícia Civil de Minas Gerais, Augusto de Lima Ave., 1833, CEP 30110-017, Belo Horizonte, MG, Brazil.
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Antônio Carlos Ave., 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Evandro Piccin
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Antônio Carlos Ave., 6627, CEP 31270-901, Belo Horizonte, MG, Brazil
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Dulay MT, Boeser CL, Walker KL, Feider C, Zare RN. Polymer substrate with surface solvent reservoir for polymer-spray mass spectrometric analysis of hydrophilic drugs. Talanta Open 2021. [DOI: 10.1016/j.talo.2021.100048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Lee G, Cha S. Depth-Dependent Chemical Analysis of Handwriting by Nanospray Desorption Electrospray Ionization Mass Spectrometry. J Am Soc Mass Spectrom 2021; 32:315-321. [PMID: 33176422 DOI: 10.1021/jasms.0c00333] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanospray desorption electrospray ionization (nano-DESI) has been utilized in direct sampling mass spectrometry (MS) that requires highly spatially resolved sampling with minimal sample destruction. In this study, we explored the applicability of nano-DESI MS for the forensic chemical analysis of ink directly from handwriting on paper. Nano-DESI readily ionizes dyes, including the polyanionic ones, with minimal fragmentation and produces chemical fingerprints of ballpoint pens directly from a paper surface. Further, we specifically focused on how the potential of nano-DESI that changes the mass spectral profiles over time could reflect the differential distribution of analytes in a vertical direction because mildly extracted analytes are immediately transferred and analyzed in real time. To test this, we wrote the character "X" with various combinations of two different pens and analyzed the crosspoints by nano-DESI MS. As a result, the time-course changes in the chemical fingerprints of the ink, which were consistent with the order of the pen strokes, were successfully obtained by nano-DESI MS in most cases. After confirming the capability of the depth-dependent analysis of nano-DESI MS, we analyzed a simulated forgery in which the original and forged writings were made before and after affixing a seal and clearly distinguished the two portions based on the time-dependent changes in the profile of the ink compound.
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Affiliation(s)
- Gwangbin Lee
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin 17035, Republic of Korea
| | - Sangwon Cha
- Department of Chemistry, Dongguk University, Seoul 04620, Republic of Korea
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Brown HM, McDaniel TJ, Fedick PW, Mulligan CC. The current role of mass spectrometry in forensics and future prospects. Anal Methods 2020; 12:3974-3997. [PMID: 32720670 DOI: 10.1039/d0ay01113d] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mass spectrometry (MS) techniques are highly prevalent in crime laboratories, particularly those coupled to chromatographic separations like gas chromatography (GC) and liquid chromatography (LC). These methods are considered "gold standard" analytical techniques for forensic analysis and have been extensively validated for producing prosecutorial evidentiary data. However, factors such as growing evidence backlogs and problematic evidence types (e.g., novel psychoactive substance (NPS) classes) have exposed limitations of these stalwart techniques. This critical review serves to delineate the current role of MS methods across the broad sub-disciplines of forensic science, providing insight on how governmental steering committees guide their implementation. Novel, developing techniques that seek to broaden applicability and enhance performance will also be highlighted, from unique modifications to traditional hyphenated MS methods to the newer "ambient" MS techniques that show promise for forensic analysis, but need further validation before incorporation into routine forensic workflows. This review also expounds on how recent improvements to MS instrumental design, scan modes, and data processing could cause a paradigm shift in how the future forensic practitioner collects and processes target evidence.
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Affiliation(s)
- Hilary M Brown
- Chemistry Division, Research Department, Naval Air Warfare Center, Weapons Division (NAWCWD), United States Navy Naval Air Systems Command (NAVAIR), China Lake, California 93555, USA.
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Jurisch M, de Paula CCA, Augusti R. Distinguishing legal and illegal cigarettes by applying paper spray mass spectrometry and chemometric tools. Rapid Commun Mass Spectrom 2020; 34:e8752. [PMID: 32059068 DOI: 10.1002/rcm.8752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
RATIONALE Smoking is responsible for one in five deaths around the world. Thus, governments have been trying to reduce the number of active smokers by increasing taxes on products. This scenario creates a new problem by raising the consumption of illegally traded cigarettes, which are often seized and analyzed by police forces. METHODS Legal and illegal cigarette samples were extracted and analyzed using paper spray ionization mass spectrometry (PS-MS). The mass spectrometer was set to operate in full-scan positive ion mode to yield representative chemical profiles of each sample. The results were used to build a chemometric model using partial least squares discriminant analysis (PLS-DA) to discriminate between both sets of samples, i.e. legal and illegal. RESULTS The PS-MS procedure was fast, simple and efficient, yielding high-quality and reproducible mass spectra with a very good signal-to-noise ratio. Even though all samples displayed visually indistinguishable mass spectra, the PS-MS data handled by the PLS-DA approach furnished a model that reached sample classification with rates of 100% and 80% for the training and validation sets, respectively. CONCLUSIONS A novel methodology was successfully developed associating the PS-MS technique with chemometric analysis to differentiate between legal and illegal cigarettes. The PS-MS technique proved to be adequate for obtaining fingerprints of such types of samples despite high complexity, and a PLS-DA model was successfully constructed achieving 82.1% accuracy.
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Affiliation(s)
- Marina Jurisch
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | | | - Rodinei Augusti
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
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Díaz-Liñán MC, García-Valverde MT, López-Lorente AI, Cárdenas S, Lucena R. Silver nanoflower-coated paper as dual substrate for surface-enhanced Raman spectroscopy and ambient pressure mass spectrometry analysis. Anal Bioanal Chem 2020; 412:3547-3557. [DOI: 10.1007/s00216-020-02603-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/12/2020] [Accepted: 03/16/2020] [Indexed: 12/14/2022]
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Dowling S, McBride EM, McKenna J, Glaros T, Manicke NE. Direct soil analysis by paper spray mass spectrometry: Detection of drugs and chemical warfare agent hydrolysis products. Forensic Chem 2020. [DOI: 10.1016/j.forc.2019.100206] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Almeida CM, Sales DD, Tosato F, dos Santos NA, Allochio Filho JF, Macrino CJ, Pinto FE, Filgueiras PR, Romão W. Study of chemical profile and of lines crossing using blue and black ink pens by LDI (+) MS and LDI (+) imaging. Microchem J 2019. [DOI: 10.1016/j.microc.2019.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bambauer TP, Maurer HH, Weber AA, Hannig M, Pütz N, Koch M, Manier SK, Schneider M, Meyer MR. Evaluation of novel organosilane modifications of paper spray mass spectrometry substrates for analyzing polar compounds. Talanta 2019; 204:677-684. [PMID: 31357352 DOI: 10.1016/j.talanta.2019.05.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/11/2022]
Abstract
Paper spray mass spectrometry (PSMS) is currently used in different analytical fields, but less effort has been made so far to use PSMS for highly polar compounds. Such analytes usually show poor performance in PSMS due to their high affinity for common paper substrates in addition to high matrix effects. In this study, strategies for hydrophobic modifications of commercially available paper substrates using ten different organosilanes were developed. The modified substrates were generated, characterized, and applied for PSMS analysis of polar toxins. By using the modified paper, PSMS performance of some of the toxins could be considerably increased, especially for orellanine, showing a more than 80-fold signal enhancement when substrates modified with chlorotrimethylsilane were used. For other toxins like ricinine, only small beneficial effects could be shown on PSMS performance when using modified substrates. Statistical equivalence tests showed sufficient ruggedness of the developed procedures also compared to conventional substrates. Thus, further systematic development of paper substrates modified with organosilane derivatives based on the presented study for application in PSMS should be encouraged.
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Affiliation(s)
- Thomas P Bambauer
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Center for Molecular Signaling (PZMS), 66421, Homburg, Germany
| | - Hans H Maurer
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Center for Molecular Signaling (PZMS), 66421, Homburg, Germany
| | - Armin A Weber
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Center for Molecular Signaling (PZMS), 66421, Homburg, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University Hospital, Homburg/Saar, Germany
| | - Norbert Pütz
- Department of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany
| | - Marcus Koch
- INM-Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
| | - Sascha K Manier
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Center for Molecular Signaling (PZMS), 66421, Homburg, Germany
| | - Marc Schneider
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, 66123, Saarbruecken, Germany
| | - Markus R Meyer
- Department of Experimental and Clinical Toxicology, Institute of Experimental and Clinical Pharmacology and Toxicology, Saarland University, Center for Molecular Signaling (PZMS), 66421, Homburg, Germany.
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Han W, Zheng Y, Muyizere T, Zhang Z. Development of paper substrate for paper spray MS in high-sensitivity analysis of biological samples. Bioanalysis 2018; 10:2047-67. [DOI: 10.4155/bio-2018-0199] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Paper spray (PS) has demonstrated a promising future for direct mass spectrometric analysis. In the process of PS, paper substrate has been demonstrated as a crucial factor in determining the final performance of PS-MS, and therefore much attention is paid to modification of paper substrate. In this review, we systematically introduce the development of paper substrate for PS. Various commercial and modified papers are comprehensively reviewed, and much effort is focused on some physical and chemical approaches for modification of paper substrate. The application of modified paper substrates to biological sample analyses is discussed. The future promising directions of paper substrate for PS are highlighted.
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de Araujo WR, Cardoso TM, da Rocha RG, Santana MH, Muñoz RA, Richter EM, Paixão TR, Coltro WK. Portable analytical platforms for forensic chemistry: A review. Anal Chim Acta 2018; 1034:1-21. [DOI: 10.1016/j.aca.2018.06.014] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 05/18/2018] [Accepted: 06/07/2018] [Indexed: 01/28/2023]
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Dias AA, Cardoso TMG, Chagas CLS, Oliveira VXG, Munoz RAA, Henry CS, Santana MHP, Paixão TRLC, Coltro WKT. Detection of Analgesics and Sedation Drugs in Whiskey Using Electrochemical Paper-based Analytical Devices. ELECTROANAL 2018. [DOI: 10.1002/elan.201800308] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Anderson A. Dias
- Instituto de Química; Universidade Federal de Goiás; Goiânia, GO 74690-900 Brazil
| | - Thiago M. G. Cardoso
- Instituto de Química; Universidade Federal de Goiás; Goiânia, GO 74690-900 Brazil
| | - Cyro L. S. Chagas
- Instituto de Química; Universidade Federal de Goiás; Goiânia, GO 74690-900 Brazil
| | | | - Rodrigo A. A. Munoz
- Instituto de Química; Universidade Federal de Uberlândia; Uberlândia, MG 38408-100 Brazil
| | - Charles S. Henry
- Department of Chemistry; Colorado State University; Fort Collins, CO 80523 United States of America
| | - Mário H. P. Santana
- Unidade Técnico-Científica -; Superintendência Regional da Polícia Federal em MG; Uberlândia, MG 38408-6630 Brazil
| | - Thiago R. L. C. Paixão
- Departamento de Química Fundamental, Instituto de Química; Universidade de São Paulo; 05508-000 São Paulo, SP Brazil
| | - Wendell K. T. Coltro
- Instituto de Química; Universidade Federal de Goiás; Goiânia, GO 74690-900 Brazil
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Calcerrada M, González-Herráez M, García-Ruiz C. Successive injection in microstructured-capillary electrophoresis for rapid pairwise comparisons. Application to questioned documents. Microchem J 2018. [DOI: 10.1016/j.microc.2018.03.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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de Paula C, Jurisch M, Piccin E, Augusti R. Recognizing drug-facilitated crimes: Detection and quantification of benzodiazepines in beverages using fast liquid-liquid extraction with low temperature partitioning and paper spray mass spectrometry. Drug Test Anal 2018; 10:1348-1357. [DOI: 10.1002/dta.2395] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 03/28/2018] [Accepted: 03/31/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Camila de Paula
- Departamento de Química, Instituto de Ciências Exatas; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
| | - Marina Jurisch
- Departamento de Química, Instituto de Ciências Exatas; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
| | - Evandro Piccin
- Departamento de Química, Instituto de Ciências Exatas; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
| | - Rodinei Augusti
- Departamento de Química, Instituto de Ciências Exatas; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
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Usmanov DT, Ashurov KB, Ninomiya S, Hiraoka K, Wada H, Nakano H, Matsumura M, Sanada-Morimura S, Nonami H. Remote sampling mass spectrometry for dry samples: Sheath-flow probe electrospray ionization (PESI) using a gel-loading tip inserted with an acupuncture needle. Rapid Commun Mass Spectrom 2018; 32:407-413. [PMID: 29235697 DOI: 10.1002/rcm.8045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/30/2017] [Accepted: 11/30/2017] [Indexed: 06/07/2023]
Abstract
RATIONALE Probe electrospray ionization (PESI) is only applicable to liquid or wet samples. In this study, a sheath-flow PESI method for remote sampling mass spectrometry that can be applied to dry samples was developed. METHODS An acupuncture needle (0.12 mm outer diameter, 700 nm tip diameter) was inserted into a gel-loading tip with a 0.1 mm protrusion out of the tip. Analytes were extracted by filling the latter tip with solvent and softly touching the sample surface for a short time (<1 s). A high voltage was applied to the acupuncture needle, and mass spectra of analytes were obtained by self-aspirating electrospray. RESULTS Dry samples, such as lines of ballpoint pen ink on paper, pharmaceutical tablets, instant coffee, brown rice, and narcotics, gave strong ion signals. The sample carryover was negligible. The sequential electrospray was observed to be similar to conventional PESI. The limits of detection (LODs) for morphine and rhodamine B were found to be of the order of picograms. CONCLUSIONS Because of its simplicity and versatility, sheath-flow PESI is a promising technique for on-site and nondestructive profile analysis of dry samples with bulky and complicated shapes, with a spatial resolution of ~0.3 mm.
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Affiliation(s)
- Dilshadbek T Usmanov
- Clean Energy Research Center, University of Yamanashi, 4-3-11, Takeda, Kofu, Yamanashi, 400-8511, Japan
- Institute of Ion-Plasma and Laser Technologies, Durmon Yoli Street 33, 100125, Tashkent, Uzbekistan
| | - Khatam B Ashurov
- Institute of Ion-Plasma and Laser Technologies, Durmon Yoli Street 33, 100125, Tashkent, Uzbekistan
| | - Satoshi Ninomiya
- Graduate School, Department of Interdisciplinary Research, University of Yamanashi, 4-3-11, Takeda, Kofu, 400-8511, Japan
| | - Kenzo Hiraoka
- Clean Energy Research Center, University of Yamanashi, 4-3-11, Takeda, Kofu, Yamanashi, 400-8511, Japan
| | - Hiroshi Wada
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, 496 Izumi, Chikugo, Fukuoka, 833-0041, Japan
| | - Hiroshi Nakano
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, 496 Izumi, Chikugo, Fukuoka, 833-0041, Japan
| | - Masaya Matsumura
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, Suya 2421, Goshi, Kumamoto, 861-1192, Japan
| | - Sachiyo Sanada-Morimura
- Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization, Suya 2421, Goshi, Kumamoto, 861-1192, Japan
| | - Hiroshi Nonami
- Plant Biophysics/Biochemistry Research Laboratory, Faculty of Agriculture, Ehime University, Matsuyama, 790-8566, Japan
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McKenna J, Jett R, Shanks K, Manicke NE. Toxicological Drug Screening using Paper Spray High-Resolution Tandem Mass Spectrometry (HR-MS/MS). J Anal Toxicol 2018; 42:300-310. [DOI: 10.1093/jat/bky001] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Indexed: 12/16/2022] Open
Affiliation(s)
- Josiah McKenna
- Forensic and Investigative Sciences Program, Indiana University-Purdue University Indianapolis (IUPUI), 402 N Blackford St, Indianapolis, IN 46202
| | - Rachel Jett
- Forensic and Investigative Sciences Program, Indiana University-Purdue University Indianapolis (IUPUI), 402 N Blackford St, Indianapolis, IN 46202
| | - Kevin Shanks
- AXIS Forensic Toxicology, 5780 W 71st St, Indianapolis, IN 46278
| | - Nicholas E Manicke
- Forensic and Investigative Sciences Program, Indiana University-Purdue University Indianapolis (IUPUI), 402 N Blackford St, Indianapolis, IN 46202
- Department of Chemistry and Chemical Biology, IUPUI, 402 N Blackford St, Indianapolis, IN 46202
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Teunissen SF, Fedick PW, Berendsen BJA, Nielen MWF, Eberlin MN, Graham Cooks R, van Asten AC. Novel Selectivity-Based Forensic Toxicological Validation of a Paper Spray Mass Spectrometry Method for the Quantitative Determination of Eight Amphetamines in Whole Blood. J Am Soc Mass Spectrom 2017; 28:2665-2676. [PMID: 28879579 DOI: 10.1007/s13361-017-1790-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/09/2017] [Accepted: 08/10/2017] [Indexed: 06/07/2023]
Abstract
Paper spray tandem mass spectrometry is used to identify and quantify eight individual amphetamines in whole blood in 1.3 min. The method has been optimized and fully validated according to forensic toxicology guidelines, for the quantification of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine (MDA), 3,4-methylenedioxy-N-methylamphetamine (MDMA), 3,4-methylenedioxy-N-ethylamphetamine (MDEA), para-methoxyamphetamine (PMA), para-methoxymethamphetamine (PMMA), and 4-fluoroamphetamine (4-FA). Additionally, a new concept of intrinsic and application-based selectivity is discussed, featuring increased confidence in the power to discriminate the amphetamines from other chemically similar compounds when applying an ambient mass spectrometric method without chromatographic separation. Accuracy was within ±15% and average precision was better than 15%, and better than 20% at the LLOQ. Detection limits between 15 and 50 ng/mL were obtained using only 12 μL of whole blood. Graphical abstract ᅟ.
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Affiliation(s)
- Sebastiaan F Teunissen
- ThoMSon Mass Spectrometry Laboratory, University of Campinas - UNICAMP, Campinas, 13083-970, Brazil
- Department of Chemistry and Center for Analytical Instrumentation, Purdue University, West Lafayette, IN, 47907, USA
| | - Patrick W Fedick
- Department of Chemistry and Center for Analytical Instrumentation, Purdue University, West Lafayette, IN, 47907, USA
| | - Bjorn J A Berendsen
- RIKILT, Wageningen Research, Akkermaalsbos 2, 6708 WB, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
| | - Michel W F Nielen
- RIKILT, Wageningen Research, Akkermaalsbos 2, 6708 WB, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
- Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE, Wageningen, The Netherlands
| | - Marcos N Eberlin
- ThoMSon Mass Spectrometry Laboratory, University of Campinas - UNICAMP, Campinas, 13083-970, Brazil
| | - R Graham Cooks
- Department of Chemistry and Center for Analytical Instrumentation, Purdue University, West Lafayette, IN, 47907, USA
| | - Arian C van Asten
- Netherlands Forensic Institute, P.O. Box 24044, 2490 AA, The Hague, The Netherlands.
- Faculty of Science, Van 't Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090 GD, Amsterdam, The Netherlands.
- CLHC, Amsterdam Center for Forensic Science and Medicine, P.O. Box 94157, 1090 GD, Amsterdam, The Netherlands.
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Cody RB, Fouquet T. Paper spray and Kendrick mass defect analysis of block and random ethylene oxide/propylene oxide copolymers. Anal Chim Acta 2017; 989:38-44. [DOI: 10.1016/j.aca.2017.08.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/23/2017] [Accepted: 08/04/2017] [Indexed: 01/09/2023]
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Amador VS, Pereira HV, Sena MM, Augusti R, Piccin E. Paper Spray Mass Spectrometry for the Forensic Analysis of Black Ballpoint Pen Inks. J Am Soc Mass Spectrom 2017; 28:1965-1976. [PMID: 28477244 DOI: 10.1007/s13361-017-1686-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 04/10/2017] [Accepted: 04/11/2017] [Indexed: 06/07/2023]
Abstract
This article describes the use of paper spray mass spectrometry (PS-MS) for the direct analysis of black ink writings made with ballpoint pens. The novel approach was developed in a forensic context by first performing the classification of commercially available ballpoint pens according to their brands. Six of the most commonly worldwide utilized brands (Bic, Paper Mate, Faber Castell, Pentel, Compactor, and Pilot) were differentiated according to their characteristic chemical patterns obtained by PS-MS. MS on the negative ion mode at a mass range of m/z 100-1000 allowed prompt discrimination just by visual inspection. On the other hand, the concept of relative ion intensity (RII) and the analysis at other mass ranges were necessary for the differentiation using the positive ion mode. PS-MS combined with partial least squares (PLS) was utilized to monitor changes on the ink chemical composition after light exposure (artificial aging studies). The PLS model was optimized by variable selection, which allowed the identification of the most influencing ions on the degradation process. The feasibility of the method on forensic investigations was also demonstrated in three different applications: (1) analysis of overlapped fresh ink lines, (2) analysis of old inks from archived documents, and (3) detection of alterations (simulated forgeries) performed on archived documents. Graphical Abstract ᅟ.
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Affiliation(s)
- Victoria Silva Amador
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Hebert Vinicius Pereira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marcelo Martins Sena
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Bioanalítica, Campinas, SP, Brazil
| | - Rodinei Augusti
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Evandro Piccin
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Liu R, Yin Z, Leng Y, Hang W, Huang B. Direct and comprehensive analysis of dyes based on integrated molecular and structural information via laser desorption laser postionization mass spectrometry. Talanta 2018; 176:116-23. [PMID: 28917730 DOI: 10.1016/j.talanta.2017.07.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 07/13/2017] [Accepted: 07/23/2017] [Indexed: 11/23/2022]
Abstract
Laser desorption laser postionization time-of-flight mass spectrometry (LDPI-TOFMS) was employed for direct analysis and determination of typical basic dyes. It was also used for the analysis and comprehensive understanding of complex materials such as blue ballpoint pen inks. Simultaneous emergences of fragmental and molecular information largely simplify and facilitate unambiguous identification of dyes via variable energy of 266nm postionization laser. More specifically, by optimizing postionization laser energy with the same energy of desorption laser, the structurally significant results show definite differences in the fragmentation patterns, which offer opportunities for discrimination of isomeric species with identical molecular weight. Moreover, relatively high spectra resolution can be acquired without the expense of sensitivity. In contrast to laser desorption/ionization mass spectrometry (LDI-MS), LDPI-MS simultaneously offers valuable molecular information about dyes in traces, solvents and additives about inks, thereby offering direct determination and comprehensive understanding of blue ballpoint inks and giving a high level of confidence to discriminate the complicated evidentiary samples. In addition, direct analysis of the inks not only allows the avoidance of the tedious sample preparation processes, significantly shortening the overall analysis time and improving throughput, but allows minimized sample consumption which is important for rare and precious samples.
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Khatami A, Prova SS, Bagga AK, Yan Chi Ting M, Brar G, Ifa DR. Detection and imaging of thermochromic ink compounds in erasable pens using desorption electrospray ionization mass spectrometry. Rapid Commun Mass Spectrom 2017; 31:983-990. [PMID: 28370721 DOI: 10.1002/rcm.7867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 06/07/2023]
Abstract
RATIONALE Thermochromic ink pens are widely accessible worldwide and have gained popularity among the general public. These pens are very useful to undo mistakes while writing important documents or exams. They are also, however, misused in committing crimes such as counterfeiting checks or wills. Thus, the forensics community is in need of techniques that will allow these forgeries to be detected rapidly, reliably and conveniently. METHODS Thermochromic ink compounds were investigated using Desorption Electrospray Ionization (DESI) coupled with an LTQ mass spectrometer and Thin-Layer Chromatography (TLC). Tandem mass spectrometric analysis was conducted using Electrospray Ionization (ESI) coupled with an Orbitrap LTQ mass spectrometer performing Collision-Induced Dissociation (CID) for identification of ink traces. RESULTS Chemical marker ions characteristic of the state of ink (visible or invisible) were identified and mapped in ink traces by the use of DESI-MS imaging. These ions can be employed by forensic experts as fingerprint markers in forged documents. The marker ions were also characterised by conducting tandem mass spectrometry using paper spray in an Orbitrap LTQ mass spectrometer. CONCLUSIONS Specific chemical components yielding ions of m/z 400, 405, 615 and 786 were distinguished as only being apparent in the invisible and reappeared state of the ink. The absence of these compounds in the original state of the ink enabled their recognition as useful chemical determinants in detecting forgery. DESI-MSI was thus shown to be a very useful, convenient and reliable technique for detecting forgery in paper documents due to its fast and reproducible mode of analysis, with no sample preparation and minimal damage to the document under investigation. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Amin Khatami
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
| | - Shamina S Prova
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
| | - Aafreen K Bagga
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
| | - Michelle Yan Chi Ting
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
| | - Gurnoor Brar
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
| | - Demian R Ifa
- Centre for Research in Mass Spectrometry (CRMS), Department of Chemistry, York University, Toronto, Canada
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Sun Q, Luo Y, Xiang P, Yang X, Shen M. Analysis of PEG oligomers in black gel inks: Discrimination and ink dating. Forensic Sci Int 2017; 277:1-9. [PMID: 28528194 DOI: 10.1016/j.forsciint.2017.04.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 03/18/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
Abstract
Carbon-based black gel inks are common samples in forensic practice of questioned document examination in China, but there are few analytical methods for this type of ink. In this study, a liquid chromatography-.high resolution mass spectrometry (LC-HRMS) method was established for the analysis of PEG oligomers in carbon-based black gel ink entries. The coupled instruments achieve both the identification and quantification of PEG oligomers in ink entries with reproducible results. Twenty carbon-based black gel inks, whose Raman spectra appeared identical, were analyzed using the LC-HRMS method. As a result, the twenty gel inks were classified into four groups according to the distribution of PEG oligomers. Artificially aging of PEG 400 and a gel ink showed that as PEG degraded, the relative amounts of low molecular weight PEG oligomers increased, while those of high molecular weight decreased. The degradation of PEG oligomers in a naturally aged gel ink was consistent with those in the artificially aged samples, but occurred more slowly. This study not only provided a new method for discriminating carbon-based black gel ink entries, but also offered a new approach for studying the relative ink dating of carbon-based black gel ink entries.
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Affiliation(s)
- Qiran Sun
- Institute of Forensic Science, Ministry of Justice, 1347 West Guangfu Road, Shanghai 200063, China
| | - Yiwen Luo
- Institute of Forensic Science, Ministry of Justice, 1347 West Guangfu Road, Shanghai 200063, China
| | - Ping Xiang
- Institute of Forensic Science, Ministry of Justice, 1347 West Guangfu Road, Shanghai 200063, China
| | - Xu Yang
- Institute of Forensic Science, Ministry of Justice, 1347 West Guangfu Road, Shanghai 200063, China
| | - Min Shen
- Institute of Forensic Science, Ministry of Justice, 1347 West Guangfu Road, Shanghai 200063, China.
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Pereira HV, Amador VS, Sena MM, Augusti R, Piccin E. Paper spray mass spectrometry and PLS-DA improved by variable selection for the forensic discrimination of beers. Anal Chim Acta 2016; 940:104-12. [DOI: 10.1016/j.aca.2016.08.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/02/2016] [Accepted: 08/03/2016] [Indexed: 01/05/2023]
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Wang X, Zheng Y, Wang T, Yang H, Bai Z, Zhang Z. Catalyst Coated Paper Substrate Strategy: Development and Its Application for Copper-Catalysts Screening and Activity Studies. ChemistrySelect 2016. [DOI: 10.1002/slct.201600518] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xuan Wang
- School of Chemistry and Chemical Engineering; Xi'an Shiyou Unviersity; Xi'an 710065 China
| | - Yajun Zheng
- School of Chemistry and Chemical Engineering; Xi'an Shiyou Unviersity; Xi'an 710065 China
| | - Teng Wang
- School of Chemistry and Chemical Engineering; Xi'an Shiyou Unviersity; Xi'an 710065 China
| | - Haijun Yang
- Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Zongquan Bai
- School of Chemistry and Chemical Engineering; Xi'an Shiyou Unviersity; Xi'an 710065 China
| | - Zhiping Zhang
- School of Chemistry and Chemical Engineering; Xi'an Shiyou Unviersity; Xi'an 710065 China
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Nguyen L, Moini M. Direct sample analysis-mass spectrometry vs separation mass spectrometry techniques for the analysis of writing inks. Forensic Chem 2016; 1:78-85. [DOI: 10.1016/j.forc.2016.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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de Paula CCA, Valadares A, Jurisch M, Piccin E, Augusti R. Paper spray mass spectrometry applied in the monitoring of a chemical system in dynamic chemical equilibrium: the redox process of methylene blue. Rapid Commun Mass Spectrom 2016; 30:1176-1180. [PMID: 27060845 DOI: 10.1002/rcm.7546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 02/17/2016] [Accepted: 02/21/2016] [Indexed: 06/05/2023]
Abstract
RATIONALE The monitoring of chemical systems in dynamic equilibrium is not an easy task. This is due to the high rate at which the system returns to equilibrium after being perturbed, which hampers the possibility of following the aftereffects of the disturbance. In this context, it is necessary to use a fast analytical technique that requires no (or minimal) sample preparation, and which is capable of monitoring the species constituting the system in equilibrium. Paper spray ionization mass spectrometry (PS-MS), a recently introduced ambient ionization technique, has such characteristics and hence was chosen for monitoring a model system: the redox process of methylene blue. METHODS The model system evaluated herein was composed of three cationic species of methylene blue (MB), which coexist in a dynamic redox system: (1) [MB](+) of m/z 284 (cationic MB); (2) [MB + H + e](+•) of m/z 285 (the protonated form of a transient species resulting from the reduction of [MB](+) ); (3) [MB + 2H + 2e](+) or [leuco-MB + H](+) of m/z 286 (the protonated leuco form of MB). Aliquots of a MB solution were collected before and after the addition of a reducing agent (metallic zinc) and directly analyzed by PS-MS for identification of the predominant cationic species at different conditions. RESULTS The mass spectra revealed that before the addition of the reducing agent the ion of m/z 284 (cationic MB) is the unique species. Upon the addition of the reducing agent and acid, however, the solution continuously undergo discoloration while reduced species derived directly from cationic MB (m/z 285 and 286) are detected in the mass spectra with increasing intensities. Fragmentation patterns obtained for each ionic species, i.e. [MB](+) , [MB + H + e](+•) and [leuco-MB + H](+) , shown to be consistent with the proposed structures. CONCLUSIONS The PS-MS technique proved to be suitable for an in situ and 'near' real-time analysis of the dynamic equilibrium involving the redox of MB in aqueous medium. The data clearly demonstrated how the redox equilibrium shifts depending on the disturbance caused to the system.
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Affiliation(s)
| | - Alberto Valadares
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Marina Jurisch
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Evandro Piccin
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Rodinei Augusti
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
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Chen J, Tang F, Guo C, Huo X, Zhang S, Wang X. Interlayer spray ionization mass spectrometry for the simple direct analysis of low amounts of sample. Anal Bioanal Chem 2016; 408:5005-12. [PMID: 27173393 DOI: 10.1007/s00216-016-9600-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 04/09/2016] [Accepted: 04/22/2016] [Indexed: 10/21/2022]
Abstract
Interlayer spray is proposed as a convenient ionization source for direct analysis by mass spectrometry. Two slices of non-absorbent substrate hold the liquid sample to form a sandwich structure. By applying a high voltage to the sample, spray is generated at the tip of the substrate. The sampling procedure can be operated easily in an open condition and the spray is processed in a semi-enclosed condition, which leads to a relatively stable process. An ultralow amount (<2 μL) of the liquid sample can be analyzed without dilution, which ensures that the natural concentration and properties of the target are maintained. Less influence from the substrate is achieved compared with the spray methods based on porous absorbent materials, which results in a sensitivity enhancement of large molecule samples. It is demonstrated that the interlayer spray is applicable for the analysis of various compounds, including therapeutic drugs, peptides, and proteins. Good linearity can be obtained at a concentration as low as 50 ng/mL in the quantitative analysis for imatinib. We also show the ability to identify the chemical residuals on surfaces with high sensitivity by the "wipe-spray" method, which is useful for the fast screening of illicit substances. Interlayer spray working with mass spectrometry provides a promising method for direct analysis in an ambient environment. Graphical Abstract The schematic of the interlayer spray ionization source.
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Abstract
Paper spray MS is part of a cohort of ambient ionization or direct analysis methods that seek to analyze complex samples without prior sample preparation. Extraction and electrospray ionization occur directly from the paper substrate upon which a dried matrix spot is stored. Paper spray MS is capable of detecting drugs directly from dried blood, plasma and urine spots at the low ng/ml to pg/ml levels without sample preparation. No front end separation is performed, so MS/MS or high-resolution MS is required. Here, we discuss paper spray methodology, give a comprehensive literature review of the use of paper spray MS for bioanalysis, discuss technological advancements and variations on this technique and discuss some of its limitations.
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Van Berkel GJ, Kertesz V. An open port sampling interface for liquid introduction atmospheric pressure ionization mass spectrometry. Rapid Commun Mass Spectrom 2015; 29:1749-1756. [PMID: 26331924 DOI: 10.1002/rcm.7274] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/07/2015] [Accepted: 07/10/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE A simple method to introduce unprocessed samples into a solvent for rapid characterization by liquid introduction atmospheric pressure ionization mass spectrometry has been lacking. The continuous flow, self-cleaning open port sampling interface introduced here fills this void. METHODS The open port sampling interface used a vertically aligned, co-axial tube arrangement enabling solvent delivery to the sampling end of the device through the tubing annulus and solvent aspiration down the center tube and into the ionization source of the mass spectrometer via the commercial APCI emitter probe. The solvent delivery rate to the interface was set to exceed the aspiration rate, creating a continuous sampling interface along with a constant, self-cleaning spillover of solvent from the top of the probe. RESULTS Using the open port sampling interface with positive ion mode APCI and a hybrid quadrupole time-of-flight mass spectrometer, rapid, direct sampling and analysis possibilities are exemplified with plastics, ballpoint and felt tip ink pens, skin, and vegetable oils. These results demonstrated that the open port sampling interface could be used as a simple, versatile and self-cleaning system to rapidly introduce multiple types of unprocessed, sometimes highly concentrated and complex, samples into a solvent flow stream for subsequent ionization and analysis by mass spectrometry. The basic setup presented here could be incorporated with any self-aspirating liquid introduction ionization source (e.g., ESI, APCI, APPI, ICP, etc.) or any type of atmospheric pressure sampling-ready mass spectrometer system. CONCLUSIONS The open port sampling interface provides a means to introduce and quickly analyze unprocessed solid or liquid samples with the liquid introduction atmospheric pressure ionization source without fear of sampling interface or ionization source contamination.
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Affiliation(s)
| | - Vilmos Kertesz
- Organic and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
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30
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Abstract
A novel paper spray ionization platform utilizing a three-dimensional paper cone tip for rapid chemical fingerprinting of raw solid materials.
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Affiliation(s)
- Purum Kim
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
| | - Sangwon Cha
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
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