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Cai K, Lin Y, Ma Y, Yang Z, Yu L, Zhang J, Xu D, Zeng R, Gao W. Determination of Residual Diisocyanates and Related Diamines in Biodegradable Mulch Films Using N-Ethoxycarbonylation Derivatization and GC-MS. Molecules 2022; 27:molecules27196754. [PMID: 36235287 PMCID: PMC9572079 DOI: 10.3390/molecules27196754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/06/2022] [Accepted: 10/07/2022] [Indexed: 12/05/2022] Open
Abstract
Diisocyanates are highly reactive compounds with two functional isocyanate groups. The exposure of diisocyanates is associated with severely adverse health effects, such as asthma, inflammation in the respiratory tract, and cancer. The hydrolysis product from diisocyanates to related diamines is also a potential carcinogen. Here, we developed an effective, accurate, and precise method for simultaneous determination of residual diisocyanates and related diamines in biodegradable mulch films, based on N-ethoxycarbonylation derivatization and gas chromatography-mass spectrometry. The method development included the optimization of ultrasonic hydrolysis and extraction, screening of N-ethoxycarbonylation conditions with ethyl chloroformate, evaluation of the diamines degradation, and analysis of the fragmentation mechanisms. Under the optimum experimental conditions, good linearity was observed with R2 > 0.999. The extraction recoveries were found in the range of 93.9−101.2% with repeatabilities and reproducibilities in 0.89−8.12% and 2.12−10.56%, respectively. The limits of detection ranged from 0.0025 to 0.057 µg/mL. The developed method was applied to commercial polybutylene adipate co-terephthalate (PBAT) biodegradable mulch film samples for analysis of the diverse residual diisocyanates and related diamine additives. The components varied greatly among the sample from different origin. Overall, this study provides a reliable method for assessing safety in biodegradable mulch films.
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Affiliation(s)
- Kai Cai
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Yechun Lin
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Yunfei Ma
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Zhixiao Yang
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Lei Yu
- Key Laboratory for Degradation Technologies of Pesticide Residues with Superior Agricultural Products in Guizhou Ecological Environment, Guiyang University, Guiyang 550005, China
| | - Jie Zhang
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Dongqing Xu
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
| | - Rong Zeng
- School of Geography Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Weichang Gao
- Guizhou Academy of Tobacco Science, Upland Flue-Cured Tobacco Quality & Ecology Key Laboratory of CNTC, Guiyang 550081, China
- Correspondence: ; Tel.: +86-0851-84116908
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2
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Kritikos N, Iliou A, Kalampaliki AD, Gikas E, Kostakis IK, Michel BY, Dotsikas Y. Chemometrically Assisted Optimization of Pregabalin Fluorescent Derivatization Reaction with a Novel Xanthone Analogue and Validation of the Method for the Determination of Pregabalin in Bulk via a Plate Reader. Molecules 2022; 27:molecules27061954. [PMID: 35335315 PMCID: PMC8954069 DOI: 10.3390/molecules27061954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/25/2022] [Accepted: 03/14/2022] [Indexed: 02/04/2023] Open
Abstract
Quantitation of chromophore-free analytes is always a challenge. To this purpose, derivatization of the analyte constitutes a common strategy, leading to a product with a strong signal. In the current study, a novel xanthone analogue was utilized for the first time for the derivatization of pregabalin, a model analyte with a primary amine moiety that lacks a chromophore. The fact that only the xanthene-based derivative, formed after the derivatization reaction fluoresces, enables avoiding its chromatographic separation from the reagent and thus reducing the analysis time of a series of samples in 1–2 min via a plate reader. The reaction conditions were optimized via a central composite design (CCD), with fluorescence signal as the measure of the yield. The following factors that affect the derivatization reaction were chosen: (a) temperature, (b) reaction time, and (c) triethylamine solution volume used to drive the reaction to completion. After the identification of the optimal conditions, the method was validated according to ICH guidelines, using a fluorescence plate reader for signal measurement (λex = 540, λem = 615 nm). Finally, the newly developed high-throughput method was applied to the determination of drug content in pregabalin bulk.
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Affiliation(s)
- Nikolaos Kritikos
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
| | - Aikaterini Iliou
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
| | - Amalia D. Kalampaliki
- Division of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (A.D.K.); (I.K.K.)
| | - Evangelos Gikas
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece;
| | - Ioannis K. Kostakis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (A.D.K.); (I.K.K.)
| | - Benoît Y. Michel
- Institut de Chimie de Nice, CNRS, UMR 7272, Université Côte d’Azur, Parc Valrose, CEDEX 2, 06108 Nice, France;
| | - Yannis Dotsikas
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
- Correspondence: ; Tel.: +30-2107274696
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3
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Naguib IA, Ali NA, Elroby FA, Elghobashy MR. Green HPLC-DAD and HPTLC Methods for Quantitative Determination of Binary Mixture of Pregabalin and Amitriptyline Used for Neuropathic Pain Management. J Chromatogr Sci 2021; 59:536-547. [PMID: 33778855 DOI: 10.1093/chromsci/bmab031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Indexed: 11/13/2022]
Abstract
First analytical methods were herein developed for determination of pregabalin (PGB) and amitriptyline (AMT) as an active binary mixture used for management of neuropathic pain whether in pure forms or in human biological fluids (plasma/urine). First method is green high-performance liquid chromatography-diode array detector (HPLC-DAD) after derivatization of PGB with ninhydrin (NIN) on a reversed-phase C18 column using a mobile phase consisting of ethanol:water (97:3%, v/v) pumped isocratically at 0.8 mL/min; AMT were scanned at 215 nm, whereas PGB-NIN was scanned at 580 nm. Second method is High-performance thin-layer chromatography (HPTLC), where PGB and AMT were separated on silica gel HPTLC F254 plates, using ethanol:ethyl acetate:acetone:ammonia solution (8:2:1:0.05, by volume) as a developing system. AMT peaks were scanned at 220 nm, whereas PGB peaks were visualized by spraying 3% (w/v) ethanolic NIN solution and scanning at 550 nm. Linear calibration curves were obtained for human plasma and urine spiked with PGB and AMT over the ranges of 5-100 μg/mL and 0.2-2.5 μg/band for PGB, and 1-100 μg/mL and 0.1-2.0 μg/band for AMT for HPLC-DAD and HPTLC methods, respectively. The suggested methods were validated according to Food and Drug Administration guidelines for bioanalytical methods validation and they can be applied for routine therapeutic drug monitoring for the concerned drugs.
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Affiliation(s)
- Ibrahim A Naguib
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, PO Box 11099, Taif 21944, Saudi Arabia
| | - Nesma A Ali
- Analytical Toxicology Laboratory, Forensic Medicine Authority, Ministry of Justice, Cairo 11647, Egypt
| | - Fadwa A Elroby
- Faculty of Medicine, Forensic Medicine Department, Beni-Suef University, Beni-Suef 62521, Egypt
| | - Mohamed R Elghobashy
- Faculty of Pharmacy, Analytical Chemistry Department, Cairo University, Cairo 11562, Egypt.,Faculty of Pharmacy, October 6 University, October 6 city, Giza 12585, Egypt
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Mohammadian E, Rahimpour E, Foroumadi A, Alizadeh-Sani M, Hasanvand Z, Jouyban A. Derivatization of γ-Amino Butyric Acid Analogues for Their Determination in the Biological Samples and Pharmaceutical Preparations: A Comprehensive Review. Crit Rev Anal Chem 2021; 52:1727-1754. [PMID: 34096806 DOI: 10.1080/10408347.2021.1916733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
γ-Aminobutyric acid (GABA) plays an important role in regulating neuronal excitability. Four structurally related drugs to GABA including pregabalin (PGB), gabapentin (GBP), vigabatrin (VGB), and baclofen are used for the treatment of central nervous system disorders. These drugs are small aliphatic molecules having neither fluorescent nor strong absorbance in the ultraviolet/visible region; therefore, direct determination of these analytes by optical methods is difficult. Additionally, their high boiling point makes gas chromatography impossible. Accordingly, the amine or acid moiety in these drugs is derivatized in order to improve their selectivity and sensitivity during determination in the biological samples. This review focuses on derivatization based methods and their different reactions for determination of PGB, GBP, VGB, and baclofen in the biological samples and pharmaceutical preparations reported between 1980 and 2020. High-performance liquid chromatography methods coupled with different detectors are a commonly used methods for determination of GABA analogs after derivatization. These methods cover 38.89% of all developed methods for determination of GABA analogs.
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Affiliation(s)
- Esmaeil Mohammadian
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elaheh Rahimpour
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Drug Design and Development Research Center, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Alizadeh-Sani
- Student's Scientific Research Center, Department of Food Safety and Hygiene, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Zaman Hasanvand
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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5
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Kumar D, Mishra A, Tarafdar A, Kumar Y, Verma K, Aluko R, Trajkovska B, Badgujar PC. In vitro bioaccessibility and characterisation of spent hen meat hydrolysate powder prepared by spray and freeze-drying techniques. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.03.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Bargel S, Becam J, Chanu L, Lanot T, Martin M, Vaucel J, Willeman T, Fabresse N. Les gabapentinoïdes : une revue de la littérature. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2021. [DOI: 10.1016/j.toxac.2020.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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ESI–LC–MS/MS for Therapeutic Drug Monitoring of Binary Mixture of Pregabalin and Tramadol: Human Plasma and Urine Applications. SEPARATIONS 2021. [DOI: 10.3390/separations8020021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Tramadol (TRM) and pregabalin (PGB) are frequently used in combination for neuropathic pain management. Accordingly, a selective and sensitive high-performance liquid chromatography–electrospray ionization–mass/mass spectrometric (ESI–LC–MS/MS) method is presented for determination of TRM and PGB, whether in pure forms or human biological fluids (plasma/urine), using gabapentin (GBP) (IS) as the internal standard. Chromatographic separation was effected in total run time of 2.5 min, on Phenomenex Luna® Omega 1.6 um polar C18 (LC 150 × 2.1 mm) column with a mobile phase of methanol/water (70:30, v/v), 0.1% (v/v) formic acid at a flow rate of 0.3 mL/min. Ionization of the analytes was obtained using electrospray in the positive ion mode (ESI+). The MS/MS detection was performed by monitoring the fragments for TRM, PGB and GBP on a triple quadrupole mass spectrometer. Assay calibration was over the range of 10–1000 ng mL−1 for TRM and PGB with the correlation coefficients over 0.999 in pure form, human plasma and urine spiked with the studied compounds. Validation data showed the inter-run relative standard deviations (RSDs) were less than 4.3% for TRM and 3.8% for PGB, whereas the intra-run RSDs were less than 3.7% for TRM and 3.6% for PGB. The mean extraction recoveries for TRM and PGB were in the ranges of 86.51–93.38% and 86.20–92.42%. This method was successfully performed on real plasma and urine samples taken from neuropathic patients and proved to be an applicable method for routine therapeutic drug monitoring of the proposed drug combination.
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8
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Zeid AM, Nasr JJM, Belal F, Walash MI, Baba Y, Kaji N. Determination of three antiepileptic drugs in pharmaceutical formulations using microfluidic chips coupled with light-emitting diode induced fluorescence detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:119021. [PMID: 33045480 DOI: 10.1016/j.saa.2020.119021] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/09/2020] [Accepted: 09/26/2020] [Indexed: 06/11/2023]
Abstract
In this study, a facile, sensitive, and precise lab-on-a-chip electrophoretic method coupled with light-emitting diode induced fluorescence (LED-IF) detection was developed to assay three antiepileptic drugs, namely, vigabatrin, pregabalin, and gabapentin, in pharmaceutical formulations. The analytes were derivatised offline for the first time with fluorescine-5-isothiocyanate (FITC) to yield highly fluorescent derivatives with λex/em of 490/520nm. The FITC-labelled analytes were injected, separated, and quantitated by a microfluidic electrophoresis device using fluorescence detection. The labelled analytes were monitored using a blue LED-IF system. The separation conditions were significantly optimised adding specific concentrations of heptakis-(2,6-di-O-methyl)-β-cyclodextrin (HDM-β-CD) and methylcellulose to the buffer solution (40mM borate buffer). HDM-β-CD acted as a selective host for the studied antiepileptic drugs, rendering a high separation efficiency. Methylcellulose was used as an efficient dynamic coating polymer to prevent the labelled drugs from being adsorbed on the inner surfaces of the poly (methylmethacrylate) microchannels. A laboratory-prepared ternary mixture of the three antiepileptic drugs was separated within 100s with acceptable resolution between all the three analytes (Rs>3) and a high number of theoretical plates (N) for each analyte (N≈106 plates/m). The sensitivity of the method was enhanced approximately 80-fold by stacking to yield a detection limit below 0.6ngmL-1 in the concentration range of 2.0-200.0ngmL-1. The method was successfully validated for analysing the studied drugs in their pharmaceutical formulations.
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Affiliation(s)
- Abdallah M Zeid
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Jenny Jeehan M Nasr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Fathalla Belal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Mohamed I Walash
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Yoshinobu Baba
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; ImPACT Research Center for Advanced Nanobiodevices, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; Institute of Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan; College of Pharmacy, Kaohsiung Medical University, 100, Shih-Chuan 1st Rd., Kaohsiung 807, Taiwan, ROC
| | - Noritada Kaji
- Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan
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9
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Shah J, Kotadiya R. A Critical Review on Analytical Methods for Recently Approved FDC Drugs: Pregabalin and Etoricoxib. Crit Rev Anal Chem 2020; 52:1048-1068. [PMID: 33307732 DOI: 10.1080/10408347.2020.1855411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Fixed-dose combinations (FDCs) refer to products containing two or more active ingredients combined in a single dosage form. The FDCs are justified because of several advantages. These are a) potentiating therapeutic efficacy, b) reducing the incidences of adverse drug effects, c) having pharmacokinetic advantages, d) reducing pills burden, e) reducing the dose of individual drugs and f) decreasing the drug resistance development. A recently approved FDC of Pregabalin IP (75 mg) and Etoricoxib (60 mg) recommended to control neuropathic chronic back pain. Analytical methods are available for individual quantitation of pregabalin (PGB) and etoricoxib (ETC), but an effective and reliable analytical method has not been reported for their combination. Thus, the objective of this literature survey was to gather information on various analytical instrumental methods used so far for the individual quantitation of PGB and ETC in various matrices. Such data would be useful to the scientific community to develop a novel analytical method for the analysis of recently approved FDC of PGB and ETC. Various scientific databases were explored to meet the objectives, and the information is synchronized. The reported methods are high-performance liquid chromatography (48% & 53%), hyphenated techniques (54% & 21%), spectroscopy (50% & 34%), and high-performance thin-layer chromatography, or thin-layer chromatography (6% & 13%) for pregabalin and etoricoxib, respectively. All these methods were specific and selective for the analysis of individual drugs.
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Affiliation(s)
- Janvi Shah
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, Gujarat, India
| | - Rajendra Kotadiya
- Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, Gujarat, India
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10
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Mohammadi P, Masrournia M, Es'haghi Z, Pordel M. Determination of four antiepileptic drugs with solvent assisted dispersive solid phase microextraction – Gas chromatography–mass spectrometry in human urine samples. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Naguib IA, Ali NA, Elroby FA, El Ghobashy MR, Abdallah FF. Ecologically evaluated and FDA-validated HPTLC method for assay of pregabalin and tramadol in human biological fluids. Biomed Chromatogr 2020; 35:e5023. [PMID: 33169415 DOI: 10.1002/bmc.5023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/03/2020] [Accepted: 11/04/2020] [Indexed: 11/12/2022]
Abstract
The introduced research presents a novel in vivo quantitative method for assay of mixtures of pregabalin and tramadol as a common combinations approved for treatment of neuropathic pain. Green analytical chemistry is a recently emerging science concerned with control of the use of chemicals harmful to the environment in various analytical methods. Consequently, a green high-performance thin layer chromatography (HPTLC) method was achieved for determination of the mixture in human plasma and urine satisfying both analytical and environmental standards. The separation was achieved on HPTLC sheets using a separating mixture of ethanol-ethyl acetate-acetone-ammonia solution (8:2:1:0.05, by volume) as a mobile phase. The sheets were dried in air then scanned at two wavelengths. For tramadol, 220 nm was chosen; however, pregabalin is an unconjugated drug, so its determination was a challenge. Hence for pregabalin, the plates were sprayed with ethanolic solution of ninhydrin (3%, w/v), to obtain a conjugated complex, which could be assessed at 550 nm. Furthermore, the developed method fulfilled the US Food and Drug Administration validation guidelines, and proved to be useful in therapeutic drug monitoring of this combination. The Eco-scale assessment protocol was implemented to determine the greenness profile of the applied method.
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Affiliation(s)
- Ibrahim A Naguib
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.,Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmad Hegazy St, Beni-Suef, 62541, Egypt
| | - Nesma A Ali
- Toxicology Laboratory, Forensic Medicine Authority, Ministry of Justice, Cairo, 11647, Egypt
| | - Fadwa A Elroby
- Forensic Medicine Department, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Mohamed R El Ghobashy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt.,Faculty of Pharmacy, October 6 University, October 6 City, Giza, Egypt
| | - Fatma F Abdallah
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmad Hegazy St, Beni-Suef, 62541, Egypt
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12
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Temerdashev A, Dmitrieva E, Azaryan A, Gashimova E. A novel approach to the quantification of urinary aryl‐propionamide‐derived SARMs by UHPLC–MS/MS. Biomed Chromatogr 2019; 34:e4700. [DOI: 10.1002/bmc.4700] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/09/2019] [Accepted: 09/13/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Azamat Temerdashev
- Department of Analytical ChemistryKuban State University Krasnodar Russia
| | | | - Alice Azaryan
- Department of Analytical ChemistryKuban State University Krasnodar Russia
| | - Elina Gashimova
- Department of Analytical ChemistryKuban State University Krasnodar Russia
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13
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Derayea SM, Attia TZ, Mohamed Elnady, Nagy DM. Isoindole based fluorophore for the sensitive fluorimetric determination of isobutyl gamma aminobutyric acid. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Dayyih WA, Hamad M, Mallah E, Dayyih AA, Mansoor K, Zakarya Z, Awad R, Arafat T. Establishment and Validation of a Sensitive Method for the Detection of Pregabalin in Pharmacological Formulation by GC/MS Spectrometry. CURR PHARM ANAL 2019. [DOI: 10.2174/1573412914666171228160833] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
A gas chromatography and mass spectrometry (GC/MS) procedure was developed
and validated for the evaluation and quantification of pregabalin (PGN) in pharmaceutical preparations.
</P><P>
Introduction: Pregabalin is a γ-amino-n-butyric acid derivative used as an antiepileptic drug for the
management of fibromyalgia, and has analgesic, anxiolytic, and anticonvulsant activities. Few studies
have been reported on the determination of PGN content in pharmaceutical preparations involving gas
chromatography - mass spectroscopy.
Methods:
Pregabalin was extracted with MSTFA/NH4F/β- mercapto-ethanol at 60°C for 30 min. The
acquired derived molecule of pregabalin was identified by specific ion monitoring mode applying the
analytical ions m/z 232 and 331. Propranolol was used as Internal Standard (IS). The following validation
parameters were taken into consideration: precision, linearity, accuracy, stability, specificity, robustness,
ruggedness, Limit Of Detection (LOD) and Limit Of Quantitation (LOQ).
Results:
The method was selective, precise, sensitive, linear and specific. The linearity of the method
was between 3.5 and 300 ng/ml. The precise values were ≤ 3.62% of both intra- and interday validation.
The LOD accurate values for Intraday and interday validation were in the range of -0. 25 -2.05%. While
LOQ accurate values for intraday and interday were 1.5x10-6 and 3.5 x10-6mg/ml, respectively.
Conclusion:
Therefore, the developed GC-MS method was effectively implemented to identify PGN in
a pharmacological preparation.
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Affiliation(s)
- Wael Abu Dayyih
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
| | - Mohammed Hamad
- Department of Basic Sciences, Collage of Sciences and Health Professions, King Saud Bin Abdulaziz University for Health Sciences, P.O. Box 9515, Jeddah 21423, Saudi Arabia
| | - Eyad Mallah
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
| | - Alice Abu Dayyih
- School of Chemistry, Biology and Pharmacy, Hochschule Fresenius University of Applied Science, Limburger Straße 2, 65510 Idstein, Germany
| | - Kenza Mansoor
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
| | - Zainab Zakarya
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
| | - Riad Awad
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
| | - Tawfiq Arafat
- Department of Pharmaceutical Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy and Medical Sciences, University of Petra, Queen Alia International Road P.O. Box: 961343, Amman, Jordan
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15
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Sargazi HR, Tamizi E, Rahimpour E, Jouyban A. Development of a Micellar Electrokinetic Chromatographic Method with Indirect UV Detection for Pregabalin Determination in Serum Samples. PHARMACEUTICAL SCIENCES 2018. [DOI: 10.15171/ps.2018.43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background: A micellar electrokinetic chromatographic (MEKC)/ indirect UV detection method with hydrodynamic and electrokinetic injection has been developed for the determination of pregabalin in the serum samples. Methods: Separation of the drug was achieved on Agilent capillary electrophorese in less than 5 min using a 50 cm × 75 μm i.d. uncoated fused-silica capillary and a background electrolyte (BGE) consisting of 5-aminosalicylic acid (5-ASA, 10 mmol L-1), cetyl trimethylammonium bromide (CTAB, 1 mmol L-1) and tri-sodium citrate (4% w/v). The influence of various parameters on the separation such as separation voltage, injection time, cassette temperature, pH of BGE and organic modifier was investigated. Results: Method validation shown good linearity (R2> 0.999) in the range of 1.5-100 µg mL-1 of pregabalin. A limit of detection (LOD) of 0.8 μg mL-1 and a limit of quantitation (LOQ) of 2.6 μg mL-1 were reported for pregabalin. Conclusion: The proposed method was found to be suitable and accurate for the determination of pregabalin in serum samples.
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Affiliation(s)
- Hamid Reza Sargazi
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran
| | - Elnaz Tamizi
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elaheh Rahimpour
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center, Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran
- Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz, Iran
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16
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Derayea SM, Attia TZ, Elnady M. Development of spectrofluorimetric method for determination of certain antiepileptic drugs through condensation with ninhydrin and phenyl acetaldehyde. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:48-54. [PMID: 29906646 DOI: 10.1016/j.saa.2018.06.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 06/05/2018] [Accepted: 06/06/2018] [Indexed: 06/08/2023]
Abstract
A new and simple spectrofluorimetric method was developed and validated for determination of gabapentin and pregabalin in their pure forms and pharmaceutical formulations with high sensitivity and selectivity. The proposed method was based on the formation of fluorescent products as a result of condensation reaction of investigated drugs with ninhydrin and phenyl acetaldehyde in Teorell and Stenhagen buffer medium. The fluorescent products had emission maxima at 470 nm after excitation at 375 nm. Parameters affecting the progress of the reaction and stability of the formed products were carefully investigated individually and optimized. The fluorescence-concentration plots were rectilinear over the range of 5.0-25.0 μg ml-1 for gabapentin and 2.0-30.0 μg ml-1 for pregabalin with excellent correlation coefficients (0.9999 for gabapentin and pregabalin). The lower detection limits were 0.45 and 0.19 μg ml-1 for gabapentin and pregabalin, respectively. The developed method has been validated in respect to linearity, accuracy, precision, selectivity and sensitivity. In addition, the proposed method was further applied for quantitative analysis of drugs in their pharmaceutical formulations with high degree of accuracy and precision. The obtained results had an excellent agreement with the reference method, indicating no significant difference in accuracy and precision.
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Affiliation(s)
- Sayed M Derayea
- Department of Analytical Chemistry, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Tamer Z Attia
- Department of Analytical Chemistry, Faculty of Pharmacy, Minia University, Minia, Egypt.
| | - Mohamed Elnady
- Department of Analytical Chemistry, Faculty of Pharmacy, Minia University, Minia, Egypt
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17
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Hitchcock ML, Marginean I. Enantiomeric Identification of Pregabalin by GC-MS via Methylation and S-TPC Chiral Derivatization. J Forensic Sci 2018; 64:406-412. [PMID: 30080926 DOI: 10.1111/1556-4029.13888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/07/2018] [Accepted: 07/12/2018] [Indexed: 11/28/2022]
Abstract
Pregabalin is a Schedule V controlled substance which is defined as the (S) enantiomer of 3-(aminomethyl)-5-methylhexanoic acid. It is used legitimately to treat neuropathy in patients with diabetes as well as for epilepsy and fibromyalgia. Pregabalin is an amino acid and an amphoteric compound, which makes it difficult to analyze using the conventional GC-MS instrumentation found in most forensic drug analysis laboratories. Problems associated with the traditional GC-MS analysis of pregabalin include selective solubility, ring closure to the corresponding lactam in the GC injection port and/or the MS transfer line and difficulty with chiral derivatization due to the presence of a carboxylic acid moiety. Here, we show that these challenges can be overcome by methylating (capping) the carboxylic acid portion of the pregabalin molecule and converting to the corresponding methyl ester. Once the methyl ester is synthesized, chiral derivatization at the amine can be achieved to identify the controlled (S) enantiomer of pregabalin via GC-MS.
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Affiliation(s)
- Michael L Hitchcock
- U.S. Postal Inspection Service National Forensic Laboratory, 22433 Randolph Drive, Dulles, VA, 20104.,Department of Forensic Sciences, George Washington University, Washington, DC, 20007
| | - Ioan Marginean
- Department of Forensic Sciences, George Washington University, Washington, DC, 20007
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18
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19
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Ianni F, Aroni K, Gili A, Sardella R, Bacci M, Lancia M, Natalini B, Gambelunghe C. GC-MS/MS detects potential pregabalin abuse in susceptible subjects' hair. Drug Test Anal 2018; 10:968-976. [PMID: 29214743 DOI: 10.1002/dta.2347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 01/12/2023]
Abstract
Pregabalin, a GABA analogue, binds to the alpha 2 delta subunit of voltage-dependent calcium channels. It is recognised as efficacious in pathologies such as epilepsy, neuropathic pain, and anxiety disorders. Since pregabalin prescriptions have increased worldwide, reports of its abuse have been accumulating, mainly in patients with opioid abuse disorders. The present study investigated potential pregabalin abuse by means of hair analysis, a matrix that provides valuable retrospective information. Half of the pool of 280 susceptible patients had been occasional drug users and were being monitored for driving licence renewals. The other 140 patients had a history of opiate dependency and were monitored to assess compliance with methadone therapy. In view of determining pregabalin in hair samples, it was extracted in methanol, successfully derivatised to give the ethyl chloroformate derivative, and finally pregabalin was analysed by gas chromatography-tandem mass spectrometry. Selectivity, linearity, limit of detection, limit of quantification, recovery, intra- and inter-day precision, and accuracy of the quantification procedure were appraised. Pregabalin limits of detection and quantification were 30 pg/mg and 50 pg/mg, respectively. We found 10.7% of hair samples from methadone patients and 4.29% from occasional drug users were positive to pregabalin without medical prescription. The mean pregabalin concentration in hair was higher than in consumers with medical indications (1.45 ng/mg vs 0.74 ng/mg). These results suggest that pregabalin possesses a significant abuse potential particularly among individuals attending opiate dependence services and that pregabalin abuse is a serious emerging issue, which should be carefully monitored.
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Affiliation(s)
- Federica Ianni
- Drug Chemistry and Technology Section, Department of Pharmaceutics, University of Perugia, Italy
| | - Kyriaki Aroni
- Forensic and Sports Medicine Section, Department of Surgery and Biomedical Science, University of Perugia, Italy
| | - Alessio Gili
- Hygiene and Public Health Section, Department of Experimental Medicine, University of Perugia, Italy
| | - Roccaldo Sardella
- Drug Chemistry and Technology Section, Department of Pharmaceutics, University of Perugia, Italy
| | - Mauro Bacci
- Forensic and Sports Medicine Section, Department of Surgery and Biomedical Science, University of Perugia, Italy
| | - Massimo Lancia
- Forensic and Sports Medicine Section, Department of Surgery and Biomedical Science, University of Perugia, Italy
| | - Benedetto Natalini
- Drug Chemistry and Technology Section, Department of Pharmaceutics, University of Perugia, Italy
| | - Cristiana Gambelunghe
- Forensic and Sports Medicine Section, Department of Surgery and Biomedical Science, University of Perugia, Italy
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20
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Tafesse TB, Mazdeh FZ, Chalipour A, Tavakoli M, Hajimahmoodi M, Amini M. Gas Chromatography–Mass Spectrometry Determination of Pregabalin in Human Plasma Using Derivatization Method. Chromatographia 2018. [DOI: 10.1007/s10337-017-3458-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Nahar L, Smith A, Patel R, Andrews R, Paterson S. Validated Method for the Screening and Quantification of Baclofen, Gabapentin and Pregabalin in Human Post-Mortem Whole Blood Using Protein Precipitation and Liquid Chromatography–Tandem Mass Spectrometry. J Anal Toxicol 2017; 41:441-450. [DOI: 10.1093/jat/bkx019] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 11/13/2022] Open
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22
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Mohamed FA, Bakr MF, Rageh AH, Mostafa AM. The use of separation techniques in the analysis of some antiepileptic drugs: A critical review. J LIQ CHROMATOGR R T 2017. [DOI: 10.1080/10826076.2016.1266654] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Fardous A. Mohamed
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Marwa F. Bakr
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Azza H. Rageh
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Aya M. Mostafa
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
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23
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Direct Separation of Pregabalin Enantiomers Using a Zwitterionic Chiral Selector by High Performance Liquid Chromatography Coupled to Mass Spectrometry and Ultraviolet Detection. Molecules 2016; 21:molecules21111578. [PMID: 27869770 PMCID: PMC6273170 DOI: 10.3390/molecules21111578] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 11/17/2022] Open
Abstract
The chromatographic resolution of pregabalin enantiomers has been often achieved by derivatization of the molecule, in order to reach enough sensitivity at low concentrations of the minor enantiomer present in the active principle. In the present article, the development and optimization of two liquid chromatographic methods are presented for the direct resolution of pregabalin enantiomers on a chiral stationary phase (CSP) containing a zwitterionic selector derived from cinchona alkaloid and sulfonic acid (CHIRALPAK ZWIX). The key parameters for the separation as well as the compatibility of chromatographic conditions with different detection modes (ultraviolet and mass spectrometry) were investigated. The resulting methods were found to be selective, of high performance and low limits of detection (2 µg/mL by UV and 1 ng/mL by MS, respectively) and quantification (6 µg/mL by UV and 5 ng/mL by MS, respectively) for the minor enantiomer which is considered as a chiral impurity.
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24
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Elliott SP, Burke T, Smith C. Determining the Toxicological Significance of Pregabalin in Fatalities. J Forensic Sci 2016; 62:169-173. [DOI: 10.1111/1556-4029.13263] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 04/27/2016] [Accepted: 05/15/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Simon P. Elliott
- Alere Forensics; Malvern Hills Science Park; Geraldine Road Malvern Worcestershire WR14 3SZ U.K
| | - Timothy Burke
- Alere Forensics; Malvern Hills Science Park; Geraldine Road Malvern Worcestershire WR14 3SZ U.K
| | - Christopher Smith
- Alere Forensics; Malvern Hills Science Park; Geraldine Road Malvern Worcestershire WR14 3SZ U.K
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25
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Hložek T, Bursová M, Coufal P, Čabala R. Gabapentin, Pregabalin and Vigabatrin Quantification in Human Serum by GC-MS After Hexyl Chloroformate Derivatization. J Anal Toxicol 2016; 40:749-753. [PMID: 27590034 DOI: 10.1093/jat/bkw070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 06/09/2016] [Accepted: 06/22/2016] [Indexed: 01/27/2023] Open
Abstract
A simple, sensitive and robust method for simultaneous determination of antiepileptic drugs (gabapentin, pregabalin and vigabatrin) in human serum using GC-MS was developed and validated for clinical toxicology purposes. This method employs an emerging class of derivatization agents - alkyl chloroformates allowing the efficient and rapid derivatization of both the amino and carboxylic groups of the tested antiepileptic drugs within seconds. The derivatization protocol was optimized using the Design of Experiment statistical methodology, and the entire sample preparation requires less than 5 min. Linear calibration curves were obtained in the concentration range from 0.5 to 50.0 mg/L, with adequate accuracy (97.9-109.3%) and precision (<12.1%). The method was successfully applied to quantification of selected γ-aminobutyric acid analogs in the serum of patients in both therapeutic and toxic concentration ranges.
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Affiliation(s)
- Tomáš Hložek
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Miroslava Bursová
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic.,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Radomír Čabala
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 121 08 Prague 2, Czech Republic .,Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
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26
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Jain R, Singh R. Applications of dispersive liquid–liquid micro-extraction in forensic toxicology. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.07.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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Ultrasound-assisted dispersive liquid–liquid microextraction followed by GC–MS/MS analysis for the determination of valproic acid in urine samples. Bioanalysis 2015; 7:2451-9. [DOI: 10.4155/bio.15.162] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Valproic acid (VPA) is an anticonvulsant drug used for the treatment of epilepsy and bipolar disorder. A method based on simultaneous derivatization and dispersive liquid–liquid microextraction followed by GC–MS/MS analysis has been developed for the determination of VPA in urine samples. Results: This optimized and validated method shows good linearity with R2 value of 0.999. LOD and LOQ of VPA was found to be 0.4 ng ml-1 and 1.4 ng ml-1, respectively. Recovery of VPA was found to be in the range of 80 to 92%. Conclusion: The developed method can find its wide applicability for the routine analysis of VPA in toxicological and clinical laboratories.
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28
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Dispersive liquid-liquid microextraction: trends in the analysis of biological samples. Bioanalysis 2015; 7:2211-25. [PMID: 26395171 DOI: 10.4155/bio.15.141] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Dispersive liquid-liquid microextraction (DLLME) is a recent microextraction technique that was first developed by Rezaee and co-workers in 2006. It allows the simultaneous extraction and preconcentration of analytes into a micro-volume of extracting solvent based on a ternary solvent system involving an aqueous phase, a nonpolar water immiscible high-density solvent that acts as extraction phase, and a disperser solvent, which is often polar and water miscible. This article presents an overview of DLLME applications in the analysis of biological samples (e.g., plasma and urine). Aside from the classical DLLME applications using high density extraction solvents, recent advances in the use of low density solvents and ionic liquids are also discussed. Although most of the applications deal with the analysis of organic target compounds, a few applications on the bioanalysis of inorganic substances are also included.
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29
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Hložek T, Bursová M, Coufal P, Čabala R. Identification and quantification of acidosis inducing metabolites in cases of alcohols intoxication by GC-MS for emergency toxicology. J Pharm Biomed Anal 2015; 114:16-21. [PMID: 26001161 DOI: 10.1016/j.jpba.2015.04.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/23/2015] [Accepted: 04/27/2015] [Indexed: 11/16/2022]
Abstract
A simple, cost effective, and fast gas chromatography method with mass spectrometry detection (GC-MS) for simultaneous measurement of formic acid, glycolic acid, methoxyacetic acid, ethoxyacetic acid and 2-hydroxyethoxyacetic acid in serum and urine was developed and validated. This multi-analyte method is highly suitable for clinical and emergency toxicology laboratory diagnostic, allowing identification and quantification of five most common acidosis inducing organic acids present in cases of alcohol intoxication. Furthermore, when patients are admitted to emergency unit at late stage of toxic alcohol intoxication, the concentration of parent compound may be already low or not detectable. This new method employs a relatively less used class of derivatization agents - alkyl chloroformates, allowing the efficient and rapid derivatization of carboxylic acids within seconds. The entire sample preparation procedure is completed within 5 min. The optimal conditions of derivatization procedure have been found using chemometric approach (design of experiment). The calibration dependence of the method was proved to be quadratic in the range of 25-3000 mg L(-1), with adequate accuracy (97.3-108.0%) and precision (<12.8%). The method was successfully applied for identification and quantification of the selected compounds in serum of patients from emergency units.
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Affiliation(s)
- Tomáš Hložek
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic.
| | - Miroslava Bursová
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Radomír Čabala
- Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University in Prague and General University Hospital, 121 08 Prague 2, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
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30
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Abstract
Since the complexity origin of biological samples, the research trends have been directed to the development of new miniaturized sample preparation techniques. This review provides a comprehensive survey of past and present microextraction methods followed by GC analysis for preconcentration and determination of various analytes in urine samples. These techniques have been classified in three general groups, including liquid-, solid- and membrane-based techniques. The principal of different microextraction methods that are located in each general group as well as their various extraction modes and the recent developments introduced for them has been presented. Subsequently, a comparison survey has been carried out among different microextraction techniques and finally a future perspective has been predicted based on the existing literature.
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31
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Priez-Barallon C, Carlier J, Boyer B, Benslima M, Fanton L, Mazoyer C, Gaillard Y. Quantification of pregabalin using hydrophilic interaction HPLC-high-resolution MS in postmortem human samples: eighteen case reports. J Anal Toxicol 2014; 38:143-8. [PMID: 24519561 DOI: 10.1093/jat/bku004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pregabalin is a drug for treating epilepsy, anxiety disorders and neuropathic pain. Cases of poisoning are rare, though some have been fatal. Concentrations of pregabalin in postmortem human samples and its distribution have very rarely been documented. As the literature is so scarce, we propose to report the concentrations in autopsy samples of 18 people who had been taking Lyrica(®), including one case of a mixed overdose involving pregabalin. Analysis was carried out using an original Hydrophilic Interaction LIquid Chromatography (HILIC) technique coupled with a high-resolution mass spectrometer (m/z 160.1334 ± 5 ppm). The sensitivity of the technique enables a quick and simple treatment of the samples by protein precipitation. The method was validated in the whole blood with detection and quantification limits of 0.025 and 0.060 µg/mL, respectively. Pregabalin was a likely factor in the cause of death in 3 of the 18 cases. In the other individuals, the concentrations ranged from 0.4 to 17.0 in the peripheral blood, 1.5 to 11.1 in the central blood, 126.6 to 2004.6 in the urine and 10.5 to 58.3 µg/mL in the bile, with median values of 5.6, 4.6, 534.6 and 17.7, respectively.
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Affiliation(s)
- Cédric Priez-Barallon
- 1 Laboratoire LAT LUMTOX, 800 av. Marie Curie, Z.I. Jean Jaurès, La Voulte-sur-Rhône 07800, France
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Pereira J, Silva CL, Perestrelo R, Gonçalves J, Alves V, Câmara JS. Re-exploring the high-throughput potential of microextraction techniques, SPME and MEPS, as powerful strategies for medical diagnostic purposes. Innovative approaches, recent applications and future trends. Anal Bioanal Chem 2014; 406:2101-22. [DOI: 10.1007/s00216-013-7527-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 11/16/2013] [Accepted: 11/20/2013] [Indexed: 11/30/2022]
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33
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Kostić N, Dotsikas Y, Malenović A, Medenica M. Effects of derivatization reagents consisting of n-alkyl chloroformate/n-alcohol combinations in LC–ESI-MS/MS analysis of zwitterionic antiepileptic drugs. Talanta 2013; 116:91-9. [DOI: 10.1016/j.talanta.2013.04.082] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/25/2013] [Accepted: 04/30/2013] [Indexed: 12/24/2022]
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34
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Pauly C, Yegles M, Schneider S. Pregabalin Determination in Hair by Ultra-High-Performance Liquid Chromatography-Tandem Mass Spectrometry. J Anal Toxicol 2013; 37:676-9. [DOI: 10.1093/jat/bkt081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ultrasound assisted dispersive liquid–liquid microextraction followed by injector port silylation: a novel method for rapid determination of quinine in urine by GC–MS. Bioanalysis 2013; 5:2277-86. [DOI: 10.4155/bio.13.188] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Silylation is a widely used derivatization method for the analysis of polar analytes by GC–MS. Ultrasound-assisted dispersive liquid–liquid microextraction (UA-DLLME) is an ecofriendly, rapid and simple microextraction method. For the first time, a novel approach has been developed and applied for the analysis of quinine in urine by combining UA-DLLME with injection port silylation. Results: The LOD and LOQ were found to be 5.4 and 18 ng/ml. The intra- and inter-day precisions were less than 5 and 8%, respectively. Mean recoveries of quinine were found to be in the range of 87 to 96%. Conclusion: Ultrasound-assisted dispersive liquid–liquid microextraction is rapid, simple and consumes less reagent for the analysis of polar analytes such as quinine.
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Development of ultrasound-assisted dispersive liquid–liquid microextraction–large volume injection–gas chromatography–tandem mass spectrometry method for determination of pyrethroid metabolites in brain of cypermethrin-treated rats. Forensic Toxicol 2013. [DOI: 10.1007/s11419-013-0196-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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Quantification of candidate prostate cancer metabolite biomarkers in urine using dispersive derivatization liquid–liquid microextraction followed by gas and liquid chromatography–mass spectrometry. J Pharm Biomed Anal 2013; 81-82:65-75. [DOI: 10.1016/j.jpba.2013.03.019] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/13/2013] [Accepted: 03/26/2013] [Indexed: 11/19/2022]
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38
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Mudiam MKR, Ratnasekhar C. Ultra sound assisted one step rapid derivatization and dispersive liquid-liquid microextraction followed by gas chromatography-mass spectrometric determination of amino acids in complex matrices. J Chromatogr A 2013; 1291:10-8. [PMID: 23602642 DOI: 10.1016/j.chroma.2013.03.061] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 03/19/2013] [Accepted: 03/21/2013] [Indexed: 11/22/2022]
Abstract
A rapid and economical method for the simultaneous determination of 20 amino acids in complex biological and food matrices (hair, urine and soybean seed samples) has been developed using ultrasound assisted dispersive liquid-liquid micro extraction (UA-DLLME). The method involves simultaneous derivatization and extraction followed by gas chromatography-mass spectrometric (GC-MS) analysis of amino acids. The parameters of UA-DLLME were optimized with the aid of design of experiments approach. The procedure involves the rapid injection of mixture of acetonitrile (disperser solvent), trichloroethylene (TCE) (extraction solvent) and ethylchloroformate (derivatization reagent) into the aqueous phase of sample extract containing pyridine. The Plackett-Burman design has indicated that, the factors such as volume of disperser and extraction solvents and pH were found to be significantly affects the extraction efficiency of the method. The optimum conditions of these factors based on central composite design were found to be 250μL of acetonitrile, 80μL of TCE and pH of 10. The limit of detection and limit of quantification were found to be in the range of 0.36-3.68μgL(-1) and 1.26-12.01μgL(-1) respectively. This is the first application of DLLME for the analysis of amino acids in any matrices. The advantages like (i) in situ derivatization and extraction of amino acids without any prior lyophilization and cleanup of sample, (ii) low consumption of extraction solvent, (iii) fast and simple, (iv) cost-effective and (iv) good repeatability make the method amenable for the routine analysis of amino acids in clinical, toxicological, nutritional and quality control laboratories.
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Affiliation(s)
- Mohana Krishna Reddy Mudiam
- Analytical Chemistry Section, CSIR-Indian Institute of Toxicology Research, Mahatma Gandhi Marg, Lucknow 226 001, Uttar Pradesh, India.
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Ferreira AMC, Laespada MEF, Pavón JLP, Cordero BM. In situ aqueous derivatization as sample preparation technique for gas chromatographic determinations. J Chromatogr A 2013; 1296:70-83. [PMID: 23726081 DOI: 10.1016/j.chroma.2013.04.084] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 04/25/2013] [Accepted: 04/29/2013] [Indexed: 10/26/2022]
Abstract
The use of derivatization reactions is a common practice in analytical laboratories. Although in many cases it is tedious and time-consuming, it does offer a good alternative for the determination of analytes not compatible to gas chromatography. Many of the reactions reported in the literature occur in organic medium. However, in situ aqueous derivatization reactions, which can be performed directly in aqueous medium, offer important advantages over those mentioned above, such as no need of a previous extraction step and easy automation. Here we review the most recent developments and applications of in situ aqueous derivatization. The discussion focuses on the derivatization reactions used for the determination of alcohols and phenols, carboxylic acids, aldehydes and ketones, nitrogen-containing compounds and thiols in different aqueous matrices, such as environmental, biological and food samples. Several reactions are described for each functional group (acylation, alkylation, esterification, among others) and, in some cases, the same reagents can be used for several functional groups, such that there is an unavoidable overlap between sections. Finally, attention is also focused on the techniques used for the introduction of the derivatives formed in the aqueous medium into the chromatographic system. The implementation of in situ aqueous derivatization coupled to preconcentration techniques has permitted the enhancement of recoveries and improvements in the separation, selectivity and sensitivity of the analytical methods.
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Affiliation(s)
- Ana María Casas Ferreira
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Ciencias Químicas, Universidad de Salamanca, 37008 Salamanca, Spain
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Rodríguez J, Castañeda G, Muñoz L. Direct determination of pregabalin in human urine by nonaqueous CE-TOF-MS. Electrophoresis 2013; 34:1429-36. [DOI: 10.1002/elps.201200564] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 01/23/2013] [Accepted: 01/24/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Juana Rodríguez
- Department of Analytical Chemistry and Food Technology; University of Castilla-La Mancha; Ciudad Real; Spain
| | - Gregorio Castañeda
- Department of Analytical Chemistry and Food Technology; University of Castilla-La Mancha; Ciudad Real; Spain
| | - Lorena Muñoz
- Department of Analytical Chemistry and Food Technology; University of Castilla-La Mancha; Ciudad Real; Spain
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Molecularly imprinted SPE combined with dispersive liquid–liquid microextraction for selective analysis of telmisartan in biological and formulation samples. Bioanalysis 2013; 5:847-58. [DOI: 10.4155/bio.13.45] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: The present communication describes the combination of molecularly imprinted SPE and dispersive liquid–liquid microextraction for the selective preconcentration and determination of telmisartan (TEL) in rat urine, plasma and pharmaceutical formulation by HPLC. Results: Various factors that can affect the extraction efficiency of molecularly imprinted SPE and dispersive liquid–liquid microextraction were optimized. The LOD and LOQ were found to be 0.19 and 0.63 µg ml-1 in urine, while in plasma it was found to be 0.28 and 0.87 µg ml-1, respectively. The percentage recovery of TEL in different matrices was found to be in the range of 81–97%. Conclusion: The proposed method may find wide applications in clinical, toxicological and QC laboratories for the routine analysis of TEL.
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