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Mishra P, Navariya S, Gupta P, Singh BP, Chopra S, Shrivastava S, Agrawal VV. A novel approach to low-cost, rapid and simultaneous colorimetric detection of multiple analytes using 3D printed microfluidic channels. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231168. [PMID: 38234445 PMCID: PMC10791535 DOI: 10.1098/rsos.231168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 12/07/2023] [Indexed: 01/19/2024]
Abstract
This research paper presents an inventive technique to swiftly create microfluidic channels on distinct membrane papers, enabling colorimetric drug detection. Using a modified DIY RepRap 3D printer with a syringe pump, microfluidic channels (µPADs) are crafted on a flexible nylon-based substrate. This allows simultaneous detection of four common drugs with a single reagent. An optimized blend of polydimethylsiloxane (PDMS) dissolved in hexane is used to create hydrophobic channels on various filter papers. The PDMS-hexane mixture infiltrates the paper's pores, forming hydrophobic barriers that confine liquids within the channels. These barriers are cured on the printer's hot plate, controlling channel width and preventing spreading. Capillary action drives fluid along these paths without spreading. This novel approach provides a versatile solution for rapid microfluidic channel creation on membrane papers. The DIY RepRap 3D printer integration offers precise control and faster curing. The PDMS-hexane solution accurately forms hydrophobic barriers, containing liquids within desired channels. The resulting microfluidic system holds potential for portable, cost-effective drug detection and various sensing applications.
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Affiliation(s)
- Piyush Mishra
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sagar Navariya
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Priyanshi Gupta
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
| | - Bhupendra Pratap Singh
- Liquid Crystal Research Laboratory, Department of Physics, University of Lucknow, Lucknow 226007, India
- Department of Electro-Optical Engineering, National United University, Miao-Li-360, Taiwan
| | - Samridhi Chopra
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Swapnil Shrivastava
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
| | - Ved Varun Agrawal
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India
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Ishizaki A, Ozawa K, Kataoka H. Simultaneous analysis of carcinogenic N-nitrosamine impurities in metformin tablets using on-line in-tube solid-phase microextraction coupled with liquid chromatography-tandem mass spectrometry. J Chromatogr A 2023; 1710:464416. [PMID: 37804578 DOI: 10.1016/j.chroma.2023.464416] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/23/2023] [Accepted: 09/26/2023] [Indexed: 10/09/2023]
Abstract
Contamination of active pharmaceutical ingredients (APIs) and pharmaceutical preparations with carcinogenic N-nitrosamines has led to recalls of these products and supply shortages to patients. The present study describes the development of a highly sensitive method for simultaneous analysis of seven N-nitrosamines using on-line in-tube solid-phase microextraction (IT-SPME) coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) to determine their actual contamination in metformin tablets. Using a Carboxen 1006 PLOT capillary as the extraction device for IT-SPME, these compounds were efficiently extracted and concentrated 6‒24-fold by subjecting 40 µL of sample to 25 repeated draw/eject cycles at a rate of 0.2 mL/min. The seven N-nitrosamines were separated within 11 min by gradient elution with 0.1 % formic acid solution and acetonitrile as the mobile phase using a CAPCELL PAK C18 MGII column and detected by multiple reaction monitoring in positive ion mode. The calibration curve showed linearity in the range 0.2‒50 ng/mL and detection limits (S/N = 3) in the range 3‒112 pg/mL. The intra-day and inter-day precisions were less than 5.5 % and 7.0 % (n = 6), respectively, with accuracies ranging from 93‒117 %. Following ultrasonic extraction with water, centrifugation and filtration of the supernatant liquid through a membrane filter, the N-nitrosamine impurities in metformin tablets could be analyzed by IT-SPME/LC‒MS/MS. Their limits of quantification (S/N = 10) were 0.1‒5.1 pg/mg API and recoveries ranged from 87‒102 %. Analysis of eight metformin tablets from eight manufacturers showed that 5.8‒7.5 pg/mg N-nitrosodimethylamine were present in three tablets, with no other N-nitrosamines detected in any of the eight tablets. This method may be useful in testing for N-nitrosamine impurities in pharmaceutical preparations.
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Affiliation(s)
- Atsushi Ishizaki
- School of Pharmacy, Shujitsu University, Nishigawara, Okayama 703-8516, Japan
| | - Kazutaka Ozawa
- School of Pharmacy, Shujitsu University, Nishigawara, Okayama 703-8516, Japan
| | - Hiroyuki Kataoka
- School of Pharmacy, Shujitsu University, Nishigawara, Okayama 703-8516, Japan.
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TARAWNEH IN, SHMEIS RA, ALFUQAHA SM, AL OMARI MM. Determination of N-nitrosodimethyl amine impurity in valsartan by HPLC and LC-MS/MS methods. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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Development of a Sensitive Screening Method for Simultaneous Determination of Nine Genotoxic Nitrosamines in Active Pharmaceutical Ingredients by GC-MS. Int J Mol Sci 2022; 23:ijms232012125. [PMID: 36292981 PMCID: PMC9603764 DOI: 10.3390/ijms232012125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/30/2022] [Accepted: 10/04/2022] [Indexed: 11/19/2022] Open
Abstract
A worldwide crisis with nitrosamine contamination in medical products began in 2018. Therefore, trace-level analysis of nitrosamines is becoming an emerging topic of interest in the field of quality control. A novel GC-MS method with electron ionization and microextraction was developed and validated for simultaneous determination of nine carcinogenic nitrosamines (NDMA, NMEA, NDEA, NDBA, NMOR, NPYR, NPIP, NDPA, and N-methyl-npz) in active pharmaceutical ingredients (APIs): cilostazol, sunitinib malate, and olmesartan medoxomil. The method was validated according to the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) guidelines, demonstrating good linearity in the range of LOQ up to 21.6 ng/mL (120% of specification limit). The limits of detection for the nine nitrosamines were determined to be in the range 0.15–1.00 ng/mL. The developed trace level GC-MS method turned out to be specific, accurate, and precise. The accuracy of all the tested APIs ranged from 94.09% to 111.22% and the precision evaluated by repeatability, intermediate precision, and system precision was RSD ≤ 7.65%. Nitrosamines were not detected in cilostazol and sunitinib, whereas in olmesartan medoxomil NDEA was detected at the level of LOQ. The novel protocol was successfully applied for nitrosamines determination in selected APIs and can be used for the routine quality control of APIs under Good Manufacturing Practices rules, ensuring the safety and effectiveness of pharmaceutical products.
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Chen Y, Xie Y, Li L, Wang Z, Yang L. Advances in mass spectrometry imaging for toxicological analysis and safety evaluation of pharmaceuticals. MASS SPECTROMETRY REVIEWS 2022:e21807. [PMID: 36146929 DOI: 10.1002/mas.21807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/27/2022] [Accepted: 08/08/2022] [Indexed: 06/16/2023]
Abstract
Safety issues caused by pharmaceuticals have frequently occurred worldwide, posing a tremendous threat to human health. As an essential part of drug development, the toxicological analysis and safety evaluation is of great significance. In addition, the risk of pharmaceuticals accumulation in the environment and the monitoring of the toxicity from natural medicines have also received ongoing concerns. Due to a lack of spatial distribution information provided by common analytical methods, analyses that provide spatial dimensions could serve as complementary safety evaluation methods for better prediction and evaluation of drug toxicity. With advances in technical solutions and software algorithms, mass spectrometry imaging (MSI) has received increasing attention as a popular analytical tool that enables the simultaneous implementation of qualitative, quantitative, and localization without complex sample pretreatment and labeling steps. In recent years, MSI has become more attractive, powerful, and sensitive and has been applied in several scientific fields that can meet the safety assessment requirements. This review aims to cover a detailed summary of the various MSI technologies utilized in the biomedical and pharmaceutical area, including technical principles, advantages, current status, and future trends. Representative applications and developments in the safety-related issues of different pharmaceuticals and natural medicines are also described to provide a reference for pharmaceutical research, improve rational clinical medicine use, and ensure public safety.
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Affiliation(s)
- Yilin Chen
- The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yanqiao Xie
- The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Linnan Li
- The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhengtao Wang
- The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Li Yang
- The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Wichitnithad W, Sudtanon O, Srisunak P, Cheewatanakornkool K, Nantaphol S, Rojsitthisak P. Development of a Sensitive Headspace Gas Chromatography-Mass Spectrometry Method for the Simultaneous Determination of Nitrosamines in Losartan Active Pharmaceutical Ingredients. ACS OMEGA 2021; 6:11048-11058. [PMID: 34056258 PMCID: PMC8153937 DOI: 10.1021/acsomega.1c00982] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 04/02/2021] [Indexed: 05/19/2023]
Abstract
Nitrosamine impurities in angiotensin II receptor antagonists (sartans) containing a tetrazole group represent an urgent concern for active pharmaceutical ingredient (API) manufacturers and global regulators. Regarding safety, API manufacturers must develop methods to monitor the levels of each nitrosamine impurity before individual batch release. In this study, we developed and validated a sensitive, selective, and high-throughput method based on headspace gas chromatography-mass spectrometry (HS-GC-MS) for the simultaneous determination of four nitrosamines in losartan potassium API with simple sample preparation. N-Nitrosodimethylamine (NDMA, m/z 74), N-nitrosodiethylamine (NDEA, m/z 102), N-nitrosoethylisopropylamine (EIPNA, m/z 116), and N-nitrosodiisopropylamine (DIPNA, m/z 130) levels were quantified using an electron impact, single quadrupole mass spectrometer under a selected-ion-monitoring acquisition method. The method was validated according to the Q2(R1) ICH guidelines. The calibration curves of the assay ranged from 25 to 5000 ng/mL with limits of quantitation of 25 ppb for NDMA and NDEA and 50 ppb for DIPNA and EIPNA. The accuracy of the developed method ranged from -7.04% to 7.25%, and the precision %CV was ≤11.5. Other validation parameters, including specificity, stability, carryover, and robustness, met the validation criteria. In conclusion, the developed method was successfully applied for the determination of nitrosamines in losartan potassium APIs.
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Affiliation(s)
- Wisut Wichitnithad
- Department
of Analytical Development, Pharma Nueva
Co., Ltd., Vibhavadi
Rangsit Road, Bangkok 10900, Thailand
- Department
of Clinical Development, Pharma Nueva Co.,
Ltd., Vibhavadi Rangsit
Road, Bangkok 10900, Thailand
| | - Orawan Sudtanon
- Department
of Analytical Development, Pharma Nueva
Co., Ltd., Vibhavadi
Rangsit Road, Bangkok 10900, Thailand
| | - Pawadee Srisunak
- Department
of Analytical Development, Pharma Nueva
Co., Ltd., Vibhavadi
Rangsit Road, Bangkok 10900, Thailand
| | - Kamonrak Cheewatanakornkool
- Department
of Analytical Development, Pharma Nueva
Co., Ltd., Vibhavadi
Rangsit Road, Bangkok 10900, Thailand
| | - Siriwan Nantaphol
- Department
of Clinical Development, Pharma Nueva Co.,
Ltd., Vibhavadi Rangsit
Road, Bangkok 10900, Thailand
| | - Pornchai Rojsitthisak
- Department
of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Phayathai, Bangkok 10330, Thailand
- Natural
Products for Ageing and Chronic Diseases Research Unit, Chulalongkorn University, Phayathai, Bangkok 10330, Thailand
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7
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Kay JE, Corrigan JJ, Armijo AL, Nazari IS, Kohale IN, Torous DK, Avlasevich SL, Croy RG, Wadduwage DN, Carrasco SE, Dertinger SD, White FM, Essigmann JM, Samson LD, Engelward BP. Excision of mutagenic replication-blocking lesions suppresses cancer but promotes cytotoxicity and lethality in nitrosamine-exposed mice. Cell Rep 2021; 34:108864. [PMID: 33730582 PMCID: PMC8527524 DOI: 10.1016/j.celrep.2021.108864] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/05/2021] [Accepted: 02/23/2021] [Indexed: 02/07/2023] Open
Abstract
N-Nitrosodimethylamine (NDMA) is a DNA-methylating agent that has been discovered to contaminate water, food, and drugs. The alkyladenine DNA glycosylase (AAG) removes methylated bases to initiate the base excision repair (BER) pathway. To understand how gene-environment interactions impact disease susceptibility, we study Aag-knockout (Aag-/-) and Aag-overexpressing mice that harbor increased levels of either replication-blocking lesions (3-methyladenine [3MeA]) or strand breaks (BER intermediates), respectively. Remarkably, the disease outcome switches from cancer to lethality simply by changing AAG levels. To understand the underlying basis for this observation, we integrate a suite of molecular, cellular, and physiological analyses. We find that unrepaired 3MeA is somewhat toxic, but highly mutagenic (promoting cancer), whereas excess strand breaks are poorly mutagenic and highly toxic (suppressing cancer and promoting lethality). We demonstrate that the levels of a single DNA repair protein tip the balance between blocks and breaks and thus dictate the disease consequences of DNA damage.
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Affiliation(s)
- Jennifer E Kay
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Joshua J Corrigan
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Amanda L Armijo
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Ilana S Nazari
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Ishwar N Kohale
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Precision Cancer Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | | | | | - Robert G Croy
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Dushan N Wadduwage
- The John Harvard Distinguished Science Fellows Program, Harvard University, Cambridge, MA 02138, USA; Center for Advanced Imaging, Harvard University, Cambridge, MA 02138, USA
| | - Sebastian E Carrasco
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | | | - Forest M White
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Precision Cancer Medicine, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - John M Essigmann
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Leona D Samson
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 01239, USA
| | - Bevin P Engelward
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 01239, USA; Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, MA 01239, USA.
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8
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Řemínek R, Foret F, Chung DS. Application of capillary electrophoresis-nano-electrospray ionization-mass spectrometry for the determination of N-nitrosodimethylamine in pharmaceuticals. Electrophoresis 2021; 42:334-341. [PMID: 33368407 DOI: 10.1002/elps.202000303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 11/09/2022]
Abstract
After a presence of highly hepatotoxic and potentially carcinogenic N-nitrosodimethylamine was detected in certain lots of sartan, ranitidine, metformin, and other pharmaceuticals, local regulatory authorities issued recalls of suspected products, and concerns of the pharmacotherapy safety were widely discussed. Since then, testing of a representative sample of each produced lot of these pharmaceuticals is required as a part of quality control processes. Hence, an interface-free CE-nanoESI system coupled with MS detection was employed for the development of a simple and economical method for quantitative detection of this contaminant in the valsartan drug substances and finished formulations used as model matrices. In this arrangement, a fused-silica capillary was used as both a separation column and a nanoESI emitter providing high ionization efficiency and sensitivity. The optimized procedure was found to have sufficient selectivity, linearity, accuracy, and precision. The established LOD and LOQ values were 0.3 and 1.0 ng/mL, respectively. The practical applicability of the method was tested by analyses of commercially available Valsacor® tablets. The results obtained prove that the developed procedure represents a promising alternative to currently available GC- and LC-based methods. Furthermore, after an adjustment of the separation conditions, the CE-nanoESI/MS system can be conceptually used for the determination of NDMA in other suspected pharmaceuticals.
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Affiliation(s)
- Roman Řemínek
- Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Brno, Czech Republic
| | - František Foret
- Institute of Analytical Chemistry of the Czech Academy of Sciences, v. v. i., Brno, Czech Republic
| | - Doo Soo Chung
- Department of Chemistry, Seoul National University, Seoul, Korea
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9
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Abe Y, Yamamoto E, Yoshida H, Usui A, Tomita N, Kanno H, Masada S, Yokoo H, Tsuji G, Uchiyama N, Hakamatsuka T, Demizu Y, Izutsu KI, Goda Y, Okuda H. Temperature-Dependent Formation of N-Nitrosodimethylamine during the Storage of Ranitidine Reagent Powders and Tablets. Chem Pharm Bull (Tokyo) 2020; 68:1008-1012. [DOI: 10.1248/cpb.c20-00431] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Shaik KM, Sarmah B, Wadekar GS, Kumar P. Regulatory Updates and Analytical Methodologies for Nitrosamine Impurities Detection in Sartans, Ranitidine, Nizatidine, and Metformin along with Sample Preparation Techniques. Crit Rev Anal Chem 2020; 52:53-71. [PMID: 32691615 DOI: 10.1080/10408347.2020.1788375] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Khaja Moinuddin Shaik
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER-Guwahati), Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Govt. of India, Guwahati, Sila Katamur (Halugurisuk), P.O.: Changsari, Dist: Kamrup, Assam, India-781101
| | - Bhaskar Sarmah
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER-Guwahati), Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Govt. of India, Guwahati, Sila Katamur (Halugurisuk), P.O.: Changsari, Dist: Kamrup, Assam, India-781101
| | - Gaurav Suresh Wadekar
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER-Guwahati), Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Govt. of India, Guwahati, Sila Katamur (Halugurisuk), P.O.: Changsari, Dist: Kamrup, Assam, India-781101
| | - Pramod Kumar
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER-Guwahati), Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Govt. of India, Guwahati, Sila Katamur (Halugurisuk), P.O.: Changsari, Dist: Kamrup, Assam, India-781101
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11
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Neyer P, Bernasconi L, Fuchs JA, Allenspach MD, Steuer C. Derivatization-free determination of short-chain volatile amines in human plasma and urine by headspace gas chromatography-mass spectrometry. J Clin Lab Anal 2019; 34:e23062. [PMID: 31595561 PMCID: PMC7031570 DOI: 10.1002/jcla.23062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/17/2019] [Accepted: 09/21/2019] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Short-chain volatile amines (SCVA) are an interesting compound class playing crucial roles in physiological and toxicological human settings. Dimethylamine (DMA), trimethylamine (TMA), diethylamine (DEA), and triethylamine (TEA) were investigated in detail. METHODS Headspace gas chromatography coupled to mass spectrometry (HS-GC-MS) was used for the simultaneous qualitative and quantitative determination of four SCVA in different human body fluids. Four hundred microliters of Li-heparin plasma and urine were analyzed after liberation of volatile amines under heated conditions in an aqueous alkaline and saline environment. Target analytes were separated on a volatile amine column and detected on a Thermo DSQ II mass spectrometer scheduled in single ion monitoring mode. RESULTS Chromatographic separation of selected SCVA was done within 7.5 minutes. The method was developed and validated with respect to accuracy, precision, recovery and stability. Accuracy and precision criteria were below 12% for all target analytes at low and high levels. The selected extraction procedure provided recoveries of more than 92% from both matrices for TMA, DEA and TEA. The recovery of DMA from Li-heparin plasma was lower but still in the acceptable range (>75%). The newly validated method was successfully applied to plasma and urine samples from healthy volunteers. Detected concentrations of endogenous metabolites DMA and TMA are comparable to already known reference ranges. CONCLUSION Herein, we describe the successful development and validation of a reliable and broadly applicable HS-GC-MS procedure for the simultaneous and quantitative determination of SCVA in human plasma and urine without relying on derivatization chemistry.
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Affiliation(s)
- Peter Neyer
- Institute of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - Luca Bernasconi
- Institute of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - Jens A Fuchs
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Christian Steuer
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
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12
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Rapid and efficient high-performance liquid chromatography analysis of N-nitrosodimethylamine impurity in valsartan drug substance and its products. Sci Rep 2019; 9:11852. [PMID: 31413326 PMCID: PMC6694186 DOI: 10.1038/s41598-019-48344-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 08/02/2019] [Indexed: 01/31/2023] Open
Abstract
In July 2018, certain valsartan-containing drugs were voluntary recalled in Japan owing to contamination with N-nitrosodimethylamine (NDMA), a probable human carcinogen. In this study, an HPLC method was developed for the quantitative detection of NDMA simultaneously eluted with valsartan. Good linearity with a correlation coefficient (R2) > 0.999 was achieved over the concentration range of 0.011-7.4 µg/mL. The limits of detection and quantification were 0.0085 μg/mL and 0.0285 μg/mL, respectively. When the recalled valsartan samples were subjected to this method, the observed NDMA contents were in agreement with the reported values, indicating that our method achieved sufficient linearity, accuracy, and precision to detect NDMA in valsartan drug substances and products. Moreover, six samples (valsartan drug substances and tablet formulations), which had a possibility for NDMA contamination, were analyzed; none of the samples contained NDMA at detectable levels. Our method would be useful for the rapid screening and quantification of NDMA impurity in valsartan drug substances and products.
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