1
|
Naito Y, Kotani M, Ohmura T. A novel laser desorption/ionization method using through hole porous alumina membranes. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2018; 32:1851-1858. [PMID: 30076645 PMCID: PMC6175246 DOI: 10.1002/rcm.8252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/16/2018] [Accepted: 07/25/2018] [Indexed: 06/01/2023]
Abstract
RATIONALE A novel matrix-free laser desorption/ionization method based on porous alumina membranes was developed. The porous alumina membranes have a two-dimensional (2D) ordered structure consisting of closely aligned straight through holes of sub-micron in diameter that are amenable to mass production by industrial fabrication processes. METHODS Considering a balance between the ion generating efficiency and the mechanical strength of the membranes, the typical values for the hole diameter, open aperture ratio and membrane thickness were set to 200 nm, 50% and 5 μm, respectively. The membranes were coated with platinum on a single side that was exposed to the laser. Evaluation experiments were conducted on the feasibility of this membrane structure for an ionization method using a single peptide and mixed peptides and polyethylene glycol samples and a commercial matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometer in the positive ion mode. RESULTS Results showed a softness of ionization and no sweet spot nature. The capillary action of the through holes with very high aspect ratio enables several loading protocols including sample impregnation from the surface opposite to the laser exposure side. CONCLUSIONS The feasibility study indicates that the through hole porous alumina membranes have several advantages in terms of usefulness over the conventional surface-assisted laser desorption ionization (SALDI) methods. The proposed novel ionization method is termed Desorption Ionization Using Through Hole Alumina Membrane (DIUTHAME).
Collapse
Affiliation(s)
- Yasuhide Naito
- The Graduate School for the Creation of New Photonics Industries1955‐1 Kurematsu‐cho, Nishi‐kuHamamatsu431‐1202Japan
| | | | | |
Collapse
|
2
|
Fu CW, Lirio S, Shih YH, Liu WL, Lin CH, Huang HY. The Cooperativity of Fe3
O4
and Metal-Organic Framework as Multifunctional Nanocomposites for Laser Desorption Ionization Process. Chemistry 2018; 24:9598-9605. [DOI: 10.1002/chem.201800994] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Chung-Wei Fu
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
| | - Stephen Lirio
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
| | - Yung-Han Shih
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
| | - Wan-Ling Liu
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
- College of Science; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
| | - Chia-Her Lin
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
- R&D Center for Membrane Technology; Chung Yuan Christian University; 200 Chung Pei Road, Chung-Li District Taoyuan City 320 Taiwan
| | - Hsi-Ya Huang
- Department of Chemistry; Chung Yuan Christian University; 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan, R.O.C
| |
Collapse
|
3
|
Wang J, Jie M, Li H, Lin L, He Z, Wang S, Lin JM. Gold nanoparticles modified porous silicon chip for SALDI-MS determination of glutathione in cells. Talanta 2017; 168:222-229. [DOI: 10.1016/j.talanta.2017.02.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 02/12/2017] [Accepted: 02/19/2017] [Indexed: 12/30/2022]
|
4
|
Bian J, Olesik SV. Surface-assisted laser desorption/ionization time-of-flight mass spectrometry of small drug molecules and high molecular weight synthetic/biological polymers using electrospun composite nanofibers. Analyst 2017; 142:1125-1132. [DOI: 10.1039/c6an02444k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Polyacrylonitrile/Nafion®/carbon nanotube (PAN/Nafion®/CNT) composite nanofibers were prepared using electrospinning.
Collapse
Affiliation(s)
- Juan Bian
- Department of Chemistry and Biochemistry
- The Ohio State University
- Columbus
- USA
| | - Susan V. Olesik
- Department of Chemistry and Biochemistry
- The Ohio State University
- Columbus
- USA
| |
Collapse
|
5
|
Shih YH, Fu CP, Liu WL, Lin CH, Huang HY, Ma S. Nanoporous Carbons Derived from Metal-Organic Frameworks as Novel Matrices for Surface-Assisted Laser Desorption/Ionization Mass Spectrometry. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:2057-2066. [PMID: 26913971 DOI: 10.1002/smll.201502817] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 02/01/2016] [Indexed: 06/05/2023]
Abstract
Surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) represents a powerful tool for the analysis of biomolecules, synthetic polymers, and even small organic compounds; its performances largely depend on the type of matrix materials utilized. Here, for the first time the employment of nanoporous carbons derived from metal-organic frameworks (MOFs) as novel matrices for SALDI-MS is demonstrated. The nanoporous carbons derived from MOFs not only circumvent the shortcomings of existing matrix materials but also demonstrate much higher efficiency of laser desorption/ionization for various compounds than any other nanoporous carbons reported so far. A new perspective for the development of matrix materials for SALDI-MS application is therefore provided.
Collapse
Affiliation(s)
- Yung-Han Shih
- Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan
| | - Chien-Ping Fu
- Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan
| | - Wan-Ling Liu
- Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan
| | - Chia-Her Lin
- Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan
| | - Hsi-Ya Huang
- Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan
| | - Shengqian Ma
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL, 33620, USA
| |
Collapse
|
6
|
Lee G, Bae SE, Huh S, Cha S. Graphene oxide embedded sol–gel (GOSG) film as a SALDI MS substrate for robust metabolite fingerprinting. RSC Adv 2015. [DOI: 10.1039/c5ra11497g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A graphene oxide embedded sol–gel (GOSG) film was utilized as a substrate for surface-assisted laser desorption/ionization mass spectrometry (SALDI MS).
Collapse
Affiliation(s)
- Gwangbin Lee
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
| | - Sang-Eun Bae
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
| | - Seong Huh
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
| | - Sangwon Cha
- Department of Chemistry
- Hankuk University of Foreign Studies
- Yongin
- Korea
| |
Collapse
|
7
|
Alhmoud HZ, Guinan TM, Elnathan R, Kobus H, Voelcker NH. Surface-assisted laser desorption/ionization mass spectrometry using ordered silicon nanopillar arrays. Analyst 2014; 139:5999-6009. [DOI: 10.1039/c4an01391c] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
8
|
Silina YE, Koch M, Volmer DA. The role of physical and chemical properties of Pd nanostructured materials immobilized on inorganic carriers on ion formation in atmospheric pressure laser desorption/ionization mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2014; 49:468-480. [PMID: 24913399 DOI: 10.1002/jms.3362] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/07/2014] [Accepted: 03/13/2014] [Indexed: 06/03/2023]
Abstract
Fundamental parameters influencing the ion-producing efficiency of palladium nanostructures (nanoparticles [Pd-NP], nanoflowers, nanofilms) during laser irradiation were studied in this paper. The nanostructures were immobilized on the surface of different solid inorganic carrier materials (porous and mono-crystalline silicon, anodic porous aluminum oxide, glass and polished steel) by using classical galvanic deposition, electroless local deposition and sputtering. It was the goal of this study to investigate the influence of both the nanoparticular layer as well as the carrier material on ion production for selected analyte molecules. Our experiments demonstrated that the dimensions of the synthesized nanostructures, the thickness of the active layers, surface disorders, thermal conductivity and physically or chemically adsorbed water influenced signal intensities of analyte ions during surface-assisted laser desorption/ionization (SALDI) while no effects such as plasmon resonance, photoelectric effect or catalytic activity were expected to occur. Excellent LDI abilities were seen for Pd-NPs immobilized on steel, while Pd nanoflowers on porous silicon exhibited several disadvantages; viz, strong memory effects, dependency of the analytical signal on amount of physically and chemically adsorbed water inside porous carrier, reduced SALDI activity from unstable connections between Pd and semiconductor material, decrease of the melting point of pure silicon after Pd immobilization and resulting strong laser ablation of metal/semiconductor complex, as well as significantly changed surface morphology after laser irradiation. The analytical performance of Pd-NP/steel was further improved by applying a hydrophobic coating to the steel surface before galvanic deposition. This procedure increased the distance between Pd-NPs, thus reducing thermal stress upon LDI; it simultaneously decreased spot sizes of deposited sample solutions.
Collapse
Affiliation(s)
- Yuliya E Silina
- Institute of Bioanalytical Chemistry, Department of Chemistry, Saarland University, Saarbrücken, Germany
| | | | | |
Collapse
|
9
|
Abstract
Laser desorption/ionization mass spectrometry (MS) is rapidly growing in popularity as an analytical characterization method in several fields. The technique shot to prominence using matrix-assisted desorption/ionization for large biomolecules (>700 Da), such as proteins, peptides and nucleic acids. However, because the matrix, which consists of small organic molecules, is also ionized, the technique is of limited use in the low-molecular-mass range (<700 Da). Recent advances in surface science have facilitated the development of matrix-free laser desorption/ionization MS approaches, which are referred to here as surface-assisted laser desorption/ionization (SALDI) MS. In contrast to traditional matrix-assisted techniques, the materials used for SALDI-MS are not ionized, which expands the usefulness of this technique to small-molecule analyses. This review discusses the current status of SALDI-MS as a standard analytical technique, with an emphasis on potential applications in proteomics.
Collapse
Affiliation(s)
- Andrew M Dattelbaum
- Materials Science & Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | | |
Collapse
|
10
|
Duan J, Wang H, Cheng Q. On-plate desalting and SALDI-MS analysis of peptides with hydrophobic silicate nanofilms on a gold substrate. Anal Chem 2010; 82:9211-20. [PMID: 20964322 DOI: 10.1021/ac102262m] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report the use of silicate nanofilms for on-plate desalting and subsequently direct laser desorption/ionization-mass spectrometric (LDI-MS) analysis of peptides. A hydrophobic octadecyltrichlorosilane (OTS) monolayer is formed on a calcinated nanofilm on a gold substrate to facilitate sample deposition and interaction with the surface that allows effective removal of MS-incompatible contaminants such as salts and surfactants by simple on-plate washing while the peptides are retained on the spot. By elimination of interferences from matrix-related ions and contaminants, sensitivity of MS analysis has been enhanced over ca. 20 times, leading to improved detection of peptides at the low-femtomolar level. A high recovery rate of the peptides is obtained by using relatively rough nanofilms, which are prepared through a modified layer-by-layer deposition/calcination process. The performance of the films has been investigated with peptide samples in the presence of high salts (NaCl and sodium acetate) and urea. Compared to matrix-assisted laser desorption/ionization analysis with CHCA matrix, LDI with on-plate desalting offers marked improvement for analysis of peptides due to low background ions and reduction of sample complexity. Additionally, selective capture of the hydrophobic components of a protein can be achieved, providing a highly useful strategy for specific peptide enrichment. LDI with on-plate desalting approach has also been successfully applied to peptide analysis from protein digests.
Collapse
Affiliation(s)
- Jicheng Duan
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | | | | |
Collapse
|
11
|
Duan J, Linman MJ, Cheng Q. Ultrathin calcinated films on a gold surface for highly effective laser desorption/ionization of biomolecules. Anal Chem 2010; 82:5088-94. [PMID: 20496922 DOI: 10.1021/ac100132x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report a nanoscale calcinated silicate film fabricated on a gold substrate for highly effective, matrix-free laser desorption ionization mass spectrometry (LDI-MS) analysis of biomolecules. The calcinated film is prepared by a layer-by-layer (LbL) deposition/calcination process wherein the thickness of the silicate layer and its surface properties are precisely controlled. The film exhibits outstanding efficiency in LDI-MS with extremely low background noise in the low-mass region, allowing for effective analysis of low mass samples and detection of large biomolecules including amino acids, peptides, and proteins. Additional advantages for the calcinated film include ease of preparation and modification, high reproducibility, low cost, and excellent reusability. Experimental parameters that influence LDI on calcinated films have been systemically investigated. Presence of citric acid in the sample significantly enhances LDI performance by facilitating protonation of the analyte and reducing fragmentation. The wetting property and surface roughness appear to be important factors that manipulate LDI performance of the analytes. This new substrate presents a marked advance in the development of matrix-free mass spectrometric methods and is uniquely suited for analysis of biomolecules over a broad mass range with high sensitivity. It may open new avenues for developing novel technology platforms upon integration with existing methods in microfluidics and optics.
Collapse
Affiliation(s)
- Jicheng Duan
- Department of Chemistry, University of California, Riverside, California 92521, USA
| | | | | |
Collapse
|
12
|
Recent advances in SALDI-MS techniques and their chemical and bioanalytical applications. Anal Bioanal Chem 2010; 399:2597-622. [DOI: 10.1007/s00216-010-4063-3] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 07/18/2010] [Accepted: 07/23/2010] [Indexed: 10/19/2022]
|
13
|
Medvedovici A, Albu F, David V. HANDLING DRAWBACKS OF MASS SPECTROMETRIC DETECTION COUPLED TO LIQUID CHROMATOGRAPHY IN BIOANALYSIS. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826076.2010.484375] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Andrei Medvedovici
- a Department of Analytical Chemistry, Faculty of Chemistry , University of Bucharest , Bucharest , Romania
| | - Florin Albu
- b Bioanalytical Laboratory , S.C. LaborMed Pharma S.A. , Bucharest , Romania
| | - Victor David
- a Department of Analytical Chemistry, Faculty of Chemistry , University of Bucharest , Bucharest , Romania
| |
Collapse
|
14
|
Piret G, Drobecq H, Coffinier Y, Melnyk O, Boukherroub R. Matrix-free laser desorption/ionization mass spectrometry on silicon nanowire arrays prepared by chemical etching of crystalline silicon. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1354-1361. [PMID: 20067318 DOI: 10.1021/la902266x] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This paper reports on the use of silicon nanowires (SiNWs), easily prepared in a single step by chemical etching of crystalline silicon in HF/AgNO(3) aqueous solution, as a highly sensitive substrate for laser desorption/ionization mass spectrometry (LDI-MS) analysis. The SiNWs' diameter and length depend on the etchant concentration and dissolution time. Optimized LDI substrate consists of nanowires with an average diameter in the range of 20-100 nm and 2.5 mum in length. The optimized SiNWs' surface morphology coupled to a controlled surface chemistry allowed a significant LDI-MS performance through measurements of a broad range of analytes, including small molecules, peptides, and a bovine serum albumin (BSA) digest. A signal-to-noise ratio of 250 was ascertained for a 10 fmol bradykinin pick, in reflector mode acquisition. Likewise, the sutent, a small tyrosine kinase inhibitor, could be observed down to 10 fmol, as compared to 500 fmol limit detection using the classical matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). We have further investigated the optical properties of the nanowires, and our results suggest that they have a small or no effect on the desorption/ionization (D/I) process. On the contrary, the surface morphology and thermal properties of the silicon nanostructures are found to be the essential features contributing to the D/I performance.
Collapse
Affiliation(s)
- Gaëlle Piret
- Institut de Recherche Interdisciplinaire (CNRS-USR 3078), Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France
| | | | | | | | | |
Collapse
|
15
|
LIN CF, LIU JT, LIN CH. Development of Spray Deposition/MALDI-TOFMS and Its Application to the Rapid Screening of Hydrolysis Products Derived from Nitrogen Mustards. ANAL SCI 2009; 25:845-9. [DOI: 10.2116/analsci.25.845] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Chu-Feng LIN
- Department of Chemistry, National Taiwan Normal University
| | - Ju-Tsung LIU
- Forensic Science Center, Military Police Command, Department of Defense
| | | |
Collapse
|
16
|
Lo CY, Lin JY, Chen WY, Chen CT, Chen YC. Surface-assisted laser desorption/ionization mass spectrometry on titania nanotube arrays. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2008; 19:1014-1020. [PMID: 18487059 DOI: 10.1016/j.jasms.2008.04.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2007] [Revised: 04/23/2008] [Accepted: 04/23/2008] [Indexed: 05/26/2023]
Abstract
Titania nanotube arrays (NTA) generated from anodizing processes are tested as the substrate for surface-assisted laser desorption/ionization mass spectrometry (SALDI MS). The background generated from titania NTA is very low, making the approach suitable for the analysis of small molecules. The upper detectable mass is approximately 29 kDa. Homogeneous sample deposition leads to good shot-to-shot reproducibility and suitability for quantitative analysis. Additionally, phosphopeptides can be selectively trapped on the titania NTA substrate, as illustrated by simply depositing a tryptic digest of beta-casein followed by titania NTA SALDI MS analysis. The detection limit for small organics and peptides is in low fmol.
Collapse
Affiliation(s)
- Chun-Yuan Lo
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan
| | | | | | | | | |
Collapse
|
17
|
Gammelgaard B, Gabel-Jensen C, Stürup S, Hansen HR. Complementary use of molecular and element-specific mass spectrometry for identification of selenium compounds related to human selenium metabolism. Anal Bioanal Chem 2008; 390:1691-706. [DOI: 10.1007/s00216-007-1788-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Revised: 11/30/2007] [Accepted: 12/04/2007] [Indexed: 10/22/2022]
|
18
|
Chen Y, Sullards MC, Hoang TT, May SW, Orlando TM. Analysis of organoselenium and organic acid metabolites by laser desorption single photon ionization mass spectrometry. Anal Chem 2007; 78:8386-94. [PMID: 17165831 DOI: 10.1021/ac060827x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A method for analyzing organoselenium and organic acid metabolites using laser desorption from graphite surfaces coupled to vacuum ultraviolet single photon ionization mass spectrometry (LD/SPI MS) is described. The 1-10-fmol sensitivity and linear dynamic range allows quantitative detection of selenomethionine, trimethylselenonium ion, methylselenogalactosamine, and 1beta-methylseleno-N-acetyl-D-galactosamine in complex biological samples such as human urine. In addition, common urinary metabolites such as tartronic, glutaric, orotic, uric, suberic, and hydroxyhippuric acids, are readily detected. Screening and quantitative detection of these organoselenium and organic acid metabolites is achieved within minutes. The results are also consistent with those obtained using high-performance liquid chromatography tandem mass spectrometry techniques. The study demonstrates the viability of matrix-free LD/SPI MS for molecular characterization and quantitative analysis of biological metabolites in the m/z 10-500 range that are present in complex biological fluids.
Collapse
Affiliation(s)
- Yanfeng Chen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
| | | | | | | | | |
Collapse
|
19
|
Lee KH, Chiang CK, Lin ZH, Chang HT. Determining enediol compounds in tea using surface-assisted laser desorption/ionization mass spectrometry with titanium dioxide nanoparticle matrices. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007; 21:2023-30. [PMID: 17534856 DOI: 10.1002/rcm.3058] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We describe the use of titanium dioxide nanoparticles (TiO2 NPs) as selective probes and matrices for the determination of catechins using surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS). The interactions between the enediol compounds and TiO2 NPs were evident by the change in color of the TiO2 NP solution from milky white to orange. Through these interactions, the TiO2 NPs could be used to concentrate enediol compounds, including catechins and ascorbic acid. The limits of detection (LODs) for three catechins--catechin, (-)-epigallocatechin, and (-)-epigallocatechin gallate--at a signal-to-noise ratio of 3 were 0.45, 1.85 and 0.65 microM, respectively. The TiO2 NP matrices provide a number of advantages over conventional organic matrices (e.g. 2',4',6'-trihydroxyacetophenone), including ease of sample preparation, less background noise in the low-mass region, and high repeatability. The applicability of this method was confirmed through the high reproducibility of the determination of the two catechins in tea samples that had not been subjected to any sample preparation procedures (shot-to-shot variation: <10%).
Collapse
Affiliation(s)
- Kun-Hong Lee
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | | | | | | |
Collapse
|
20
|
Chen Y, Vertes A. Adjustable Fragmentation in Laser Desorption/Ionization from Laser-Induced Silicon Microcolumn Arrays. Anal Chem 2006; 78:5835-44. [PMID: 16906730 DOI: 10.1021/ac060405n] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Laser-induced silicon microcolumn arrays (LISMA) were developed as matrix-free substrates for soft laser desorption/ionization mass spectrometry (SLDI-MS). When low-resistivity silicon wafers were irradiated in air, sulfur hexafluoride, or water environment with multiple pulses from a 3 x omega mode-locked Nd:YAG laser, columnar structures were formed on the surface. The radii of curvature of the column tips varied with the processing environment, ranging from approximately 120 nm in water, to <1 mum in SF6, and to approximately 2 mum in air. In turn, these microcolumn arrays were used as matrix-free soft laser desorption substrates. In SLDI-MS experiments with a nitrogen laser, the microcolumn arrays obtained in water environment readily produced molecular ions for peptides and synthetic polymers at low laser fluence. These surfaces demonstrated the best ion yield among the three arrays. The threshold laser fluence and ion yield were comparable to those observed in matrix-assisted laser desorption/ionization. Low-femtomole sensitivity and approximately 6000 Da mass range were achieved. At elevated laser fluence, efficient in-source decay was observed and extensive peptide sequence information was extracted from the resulting mass spectra. The versatility of LISMA was attributed to confinement effects due to the submicrometer morphology and to the surface, thermal, and optical properties of processed silicon.
Collapse
Affiliation(s)
- Yong Chen
- Department of Chemistry, Institute for Proteomics Technology and Applications, George Washington University, Washington, DC 20052, USA
| | | |
Collapse
|
21
|
Chen WY, Chen YC. Affinity-based mass spectrometry using magnetic iron oxide particles as the matrix and concentrating probes for SALDI MS analysis of peptides and proteins. Anal Bioanal Chem 2006; 386:699-704. [PMID: 16685517 DOI: 10.1007/s00216-006-0427-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Revised: 03/06/2006] [Accepted: 03/15/2006] [Indexed: 10/24/2022]
Abstract
Silane-immobilized magnetic iron oxide particles were used as the assisting material in surface-assisted laser desorption/ionization (SALDI) mass spectrometric analysis. This approach can be used to analyze small proteins and peptides. The upper detectable mass range is approximately 16 kDa. The detection limit for peptides is about 20 fmol. Silanized iron oxide particles with negatively charged functionalities can also be used as the affinity probes to selectively trap oppositely charged species from sample solutions by adjusting the pH of the solution. A tryptic digest product of cytochrome C at a concentration as low as 10 nM can be enriched by the particles and directly analyzed by iron oxide SALDI MS without the need for elution steps. Affinity-based mass spectrometry using the bifunctional silanized magnetic iron oxide particles as the SALDI matrix and concentrating probe is demonstrated in this study.
Collapse
Affiliation(s)
- Wei-Yu Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, 300, Taiwan
| | | |
Collapse
|
22
|
Shu YR, Su AK, Liu JT, Lin CH. Screening of Nerve Agent Degradation Products by MALDI-TOFMS. Anal Chem 2006; 78:4697-701. [PMID: 16808484 DOI: 10.1021/ac060007k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel method for the rapid screening of degradation products derived from nerve agents by matrix-assisted laser desorption ionization time-of-flight mass spectrometry is described. Five standard products were selected as model compounds, including isopropyl methylphosphonic acid (IMPA), pinacolyl methylphosphonic acid (PMPA), ethyl methylphosphonic acid (EMPA), isobutyl methylphosphonic acid (i-BuMPA), and cyclohexyl methylphosphonic acid (CHMPA), which are degradation products of Sarin (GB), Soman (GD), VX, Russian VX (RVX), and GF, respectively. For comparison, CHCA (alpha-cyano-4-hydroxycinnamic acid) and DCCA (7-(diethylamino)coumarin-3-carboxylic acid) were used as the MALDI-matrix when the third harmonic generation (355 nm) of a Nd:YAG laser and a hydrogen Raman laser (multifrequency laser) were used, respectively. The method permitted the five nerve agent degradation products to be screened rapidly and successfully, suggesting that it has the potential for use as a routine monitoring tool.
Collapse
Affiliation(s)
- You-Ren Shu
- Department of Chemistry, National Taiwan Normal University, 88 Section 4, Tingchow Road, Taipei, Taiwan
| | | | | | | |
Collapse
|
23
|
Guo Z, Ganawi AAA, Liu Q, He L. Nanomaterials in mass spectrometry ionization and prospects for biological application. Anal Bioanal Chem 2005; 384:584-92. [PMID: 16283267 DOI: 10.1007/s00216-005-0125-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 09/14/2005] [Accepted: 09/15/2005] [Indexed: 10/25/2022]
Abstract
The rapid development of nanotechnology has revolutionized scientific developments in recent decades. Mass spectrometry (MS) measurements are no exception and have benefited greatly from integration of nanomaterials in every step of analysis. This brief review summarizes recent developments in the field with the focus on the use of nanomaterials as alternative media to facilitate analyte ionization in laser-desorption ionization-mass spectrometry (LDI-MS) and secondary ion mass spectrometry (SIMS). The biological applications of both techniques are also detailed. The use of nanomaterials in other aspects of MS analysis, for example in sample clean-up and indirect analyte quantification, is briefly discussed.
Collapse
Affiliation(s)
- Zhong Guo
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | | | | | | |
Collapse
|
24
|
Su AK, Liu JT, Lin CH. Rapid drug-screening and quantitation of 3,4-methylenedioxymethamphetamine in urine by MALDI-TOF mass spectrometry. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.05.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Ren SF, Zhang L, Cheng ZH, Guo YL. Immobilized carbon nanotubes as matrix for MALDI-TOF-MS analysis: applications to neutral small carbohydrates. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2005; 16:333-339. [PMID: 15734326 DOI: 10.1016/j.jasms.2004.11.017] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2004] [Revised: 11/22/2004] [Accepted: 11/22/2004] [Indexed: 05/24/2023]
Abstract
In this work, we reported on the advantages of immobilized carbon nanotubes as a novel MALDI-matrix. Recently, carbon nanotubes have been reported to be an effective MALDI matrix for small molecules (Anal. Chem.2003, 75, 6191), as it can eliminate the interfering matrix peaks as well as form a web morphology to fully disperse the analyte and allow strong ultraviolet absorption for enhanced pulsed laser desorption and ionization. In our study, to overcome the problem that the carbon nanotube matrix may fly off from the target, a type of polyurethane adhesive, NIPPOLAN-DC-205, is introduced to immobilize carbon nanotubes on the target, which enables widespread application of carbon nanotubes as matrix for MALDI-MS analysis. At the same time, the properties of the carbon nanotubes as an efficient matrix remained after immobilization. The presence of NIPPOLAN-DC-205 increases the time for analysis at a particular desorption spot by minimizing the time-consuming search for "hot spots" and facilitating experiments such as post source decay (PSD) which need longer-lasting signals. Moreover, NIPPOLAN-DC-205 produces no interference peaks and can easily be cleaned with acetone. Fast evaporation technology may be used to enhance signal reproducibility in MALDI analysis using carbon nanotubes as matrix. Consequently, the applicability of the carbon nanotube as matrix for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) analysis of low molecular mass analytes is highly improved. The feasibility of the method employing polyurethane is demonstrated by comparison of the results produced from the carbon nanotube matrix with and without immobilization. In addition, neutral small carbohydrates, which are difficult to be ionized normally, can be cationized with high efficiency by MALDI-TOF-MS using the immobilized carbon nanotube matrix. The method was further applied to analyze peptides and detect urine glucose successfully.
Collapse
Affiliation(s)
- Shi-fang Ren
- Shanghai Mass Spectrometry Center, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | | | | | | |
Collapse
|
26
|
Zougagh M, Cano Pavón JM, Garcia de Torres A. Chelating sorbents based on silica gel and their application in atomic spectrometry. Anal Bioanal Chem 2005; 381:1103-13. [PMID: 15703917 DOI: 10.1007/s00216-004-3022-2] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2004] [Revised: 12/03/2004] [Accepted: 12/07/2004] [Indexed: 11/26/2022]
Abstract
This mini-review covers chelating sorbents anchored to silica gel and their analytical applications for the preconcentration, separation and determination of trace metal ions, focussing mainly on the last 20 years. The article summarizes also the experience gathered by our research group in the synthesis and characterization of new modified silica gels "via silanization", and their affinity toward selective extraction and separation of trace elements. The introduction of 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide silica gel (DPTH-gel) and methylthiosalicylate silica gel (TS-gel) chelating sorbents in trace and ultratrace analysis provide vital breakthroughs in preconcentration methods. These home-made materials allow certain analytes to be selectively extracted from complex matrices without matrix interference and good detection limits. The advantages of these new chelating sorbents in comparison with 8-hydroxyquinoline chelating sorbent immobilized on silica gel are discussed.
Collapse
Affiliation(s)
- Mohammed Zougagh
- Department of Analytical Chemistry, University of Córdoba, Campus de Rabanales, Edificio Marie Curie, 14071, Córdoba, Spain
| | | | | |
Collapse
|