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Hansen M, Havnen H, Andreassen TN, Spigset O, Hegstad S. Quantitative determination of R/S-methadone in human serum using ultra-high performance supercritical fluid chromatography-tandem mass spectrometry: A method for routine use. Drug Test Anal 2024; 16:708-716. [PMID: 38600723 DOI: 10.1002/dta.3693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 03/12/2024] [Accepted: 03/20/2024] [Indexed: 04/12/2024]
Abstract
Methadone has two enantiomers, which exhibit differences in pharmacological effects, with R-methadone being the active and S-methadone the inactive enantiomer. A robust, simple and rapid method for chiral separation of the two enantiomers in serum samples using ultra-high performance supercritical fluid chromatography-tandem mass spectrometry (UHPSFC-MSMS) has been developed and validated. Enantiomeric separation was achieved using a Chiralpak IH-3 column with a mobile phase consisting of CO2 and 30mM ammonium acetate in methanol/water (98/2, v/v). Runtime was 4 minutes. Sample preparation was semi-automated using a Hamilton ML Star robot with protein precipitation, and phospholipid removal was carried out using a Waters OSTRO™ 96-well plate. The calibration range was 50.0-1,500 nM for each enantiomer. The between-assay relative standard deviations were in the range of 1.2-3.6%. Matrix effects ranged from 99% to 115% corrected with internal standard. The method has been implemented in our laboratory and has proven to be a robust and reliable method for determining the ratio of R/S-methadone in authentic patient samples.
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Affiliation(s)
- Miriam Hansen
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway
| | - Hilde Havnen
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway
| | | | - Olav Spigset
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Solfrid Hegstad
- Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway
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2
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Feng J, Zhong Q, Zhou T. Online Pressure Change Focusing-Supercritical Fluid Selective Extraction Chromatography for Analyzing Chiral Drugs in Microliter-Scale Plasma Samples. Anal Chem 2022; 94:16222-16230. [DOI: 10.1021/acs.analchem.2c03892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jieqing Feng
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou510006, China
| | - Qisheng Zhong
- Guangzhou Analytical Center, Shimadzu (China) Co., Ltd., Guangzhou510010, China
| | - Ting Zhou
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou510006, China
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3
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Pang B, Jiang Y. Progress in pretreatment of methadone: an update since 2015. Prep Biochem Biotechnol 2022; 53:109-119. [PMID: 35369846 DOI: 10.1080/10826068.2022.2056900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Methadone, a µ-opioid receptor agonist, is widely used in pain-relieving and treating opioid dependence. If not strictly controlled, as an opioid substitute, it can lead to abuse and cause more severe withdrawal responses than heroin. Also, overdose or abuse of this drug in clinical use may provide severe side effects such as apnea, circulatory collapse, cardiac arrest, and even death. For these reasons, simple, rapid, and efficient methods have been developed for the pretreatment of methadone. This review presents a comprehensive conclusion of the pretreatment methods used for methadone in various sample matrices, focusing on the developments since 2015. Traditionally used pretreatment methods like solid-phase extraction and liquid-liquid extraction are discussed and newly developed methods like solid-phase microextraction and liquid-liquid microextraction along with new materials applied are focused.
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Affiliation(s)
- Bo Pang
- China Medical University-The Queen's University of Belfast Joint College, China Medical University, Shen Yang, China
| | - Yinru Jiang
- China Medical University-The Queen's University of Belfast Joint College, China Medical University, Shen Yang, China
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4
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Shan X, Zhang L, Yang B. Review of LC techniques for determination of methadone and its metabolite in the biological samples. Prep Biochem Biotechnol 2021; 51:953-960. [PMID: 34365899 DOI: 10.1080/10826068.2021.1952598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Methadone (MTD) is a synthetic analgesic drug used for treating opioid dependence and effectively used clinically for patients with severe pain. The abuse of MTD may lead to poisoning, disorder in the central nervous system and even death. The regular monitoring of MTD in biological matrices including serum, plasma and urine samples is an effective way to control abuse of MTD. In this manner, the selection of analytical monitoring of MTD in biological matrices is of paramount importance. This study was conducted to review high-performance liquid chromatography (HPLC) techniques carried out on MTD and its main metabolite 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP) in the biological samples during 2015-June 2021.
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Affiliation(s)
- Xiaoyue Shan
- Hangzhou Occupational Disease Prevention and Control Hospital, Hangzhou, China
| | - Lei Zhang
- Hangzhou Occupational Disease Prevention and Control Hospital, Hangzhou, China
| | - Bingsheng Yang
- Hangzhou Occupational Disease Prevention and Control Hospital, Hangzhou, China
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5
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Huang CL, Chiang YC, Chang WC, Su YT, Yang JC, Cheng WC, Lane HY, Ho IK, Ma WL. Add-On Selective Estrogen Receptor Modulators for Methadone Maintenance Treatment. Front Endocrinol (Lausanne) 2021; 12:638884. [PMID: 34434167 PMCID: PMC8381776 DOI: 10.3389/fendo.2021.638884] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 07/15/2021] [Indexed: 11/13/2022] Open
Abstract
Methadone maintenance treatment (MMT) remains the cornerstone for the management of opiate abuse. However, MMT can be associated with complex factors, including complications during the tolerance phase, the inability of some patients to maintain treatment effects during the tapering or abstinence phases, and the development of methadone dependence. Previous studies have revealed a sex disparity in MMT efficacy, showing that women undergoing MMT experiencing an increase in psychological symptoms compared with men and suggesting a link between disparate responses and the effects of estrogen signaling on methadone metabolism. More specifically, estradiol levels are positively associated with MMT dosing, and the expression of a single-nucleotide polymorphism (SNP) associated with estrogen receptor (ER) regulation is also associated with MMT dosing. In addition to performing mechanistic dissections of estrogen signaling in the presence of methadone, past studies have also proposed the targeting of estrogen signaling during MMT. The present report provides an overview of the relevant literature regarding sex effects, including differences in sex hormones and their potential impacts on MMT regimens. Moreover, this article provides a pharmacological perspective on the targeting of estrogen signals through the use of selective ER modulators (SERMs) during MMT. Preliminary preclinical experiments were also performed to evaluate the potential effects of targeting estrogen signaling with tamoxifen on methadone metabolism.
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Affiliation(s)
- Chieh-Liang Huang
- Tsaotun Psychiatric Center, Ministry of Health and Welfare, Taichung, Taiwan
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
| | - Yao-Chang Chiang
- Department of Nursing, Division of Basic Medical Sciences, Chang Gung University of Science and Technology, Chiayi County, Taiwan
| | - Wei-Chun Chang
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
| | - Yu-Ting Su
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
| | - Juan-Cheng Yang
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
| | - Wei-Chung Cheng
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
| | - Hsien-Yuan Lane
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
| | - Ing-Kang Ho
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
| | - Wen-Lung Ma
- Sex Hormone Research Center, Center for Drug Abuse and Addiction, Chinese Medicine Research and Development Center, Department of Psychiatry, Department of OBS & GYN, China Medical University Hospital, Taichung, Taiwan
- Graduate Institute of Biomedical Sciences, School of Medicine, China Medical University, Taichung, Taiwan
- Department of Nursing, Asia University, Taichung, Taiwan
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6
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A Sensitive LC-MS/MS Assay for the Quantification of Methadone and its Metabolites in Dried Blood Spots: Comparison With Plasma. Ther Drug Monit 2019; 42:118-128. [PMID: 31318842 DOI: 10.1097/ftd.0000000000000674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Methadone, a synthetic narcotic, is widely used both in adults and children for pain control and as a replacement drug in opioid use disorder to prevent craving and withdrawal. To support clinical pharmacokinetic trials in neonates, infants, and children, the authors developed and validated a novel, automated, highly sensitive liquid chromatography-electrospray-tandem mass spectrometry ionization (LC-ESI-MS/MS) method for the quantification of methadone and its metabolites, 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP) and 2-ethyl-5-methyl-3,3-diphenylpyraline (EMDP), in samples collected as dried blood spots. METHODS Blood was spiked with different concentrations of methadone, EDDP, and EMDP, and blood drops were applied to filter paper cards. Punches of 6.4 mm were removed from the cards, and 600 µL of protein precipitation solution (methanol/0.2M ZnSO4, 7:3, vol/vol) containing the internal standards (methadone-d9 and EDDP-d5) at a concentration of 1 mcg/L was added. The extracts were analyzed using LC-ESI-MS/MS in combination with online extraction. The mass spectrometer was run in the positive multiple reaction monitoring mode, and the total run time was 3.2 minutes. RESULTS For the dried blood spots, the assay has a lower limit of quantification of 0.1 mcg/L for methadone, EDDP, and EMDP. The range of reliable response for methadone for the ion transition m/z = 310.2→265.1 was 0.1-100 mcg/L and for the ion transition m/z = 310.2→223.1 5-1000 mcg/L. For EDDP, on the range of reliable response for the ion transition, m/z = 278.2→234.3 was 0.1-100 mcg/L and for the ion transition m/z = 278.2→186.1 5-1000 mcg/L. The calibration range for EMDP was 0.1-100 mcg/L. Accuracy (85%-115%) and imprecision (<15%) met predefined acceptance criteria. DISCUSSION This assay allows for the measurement of small volume blood samples without the need for an intravenous blood draw, and thus, it is suitable for pharmacokinetics studies and therapeutic drug monitoring in pediatric patients.
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Victorri-Vigneau C, Verstuyft C, Bouquié R, Laforgue EJ, Hardouin JB, Leboucher J, Le Geay B, Dano C, Challet-Bouju G, Grall-Bronnec M. Relevance of CYP2B6 and CYP2D6 genotypes to methadone pharmacokinetics and response in the OPAL study. Br J Clin Pharmacol 2019; 85:1538-1543. [PMID: 30907440 DOI: 10.1111/bcp.13936] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/07/2019] [Accepted: 03/17/2019] [Indexed: 02/07/2023] Open
Abstract
AIMS Our study aimed to evaluate the impacts of the cytochrome P450 (CYP) 2B6-G516T and CYP2D6 genetic polymorphisms on pharmacokinetic and clinical parameters in patients receiving methadone maintenance treatment. METHODS Opioid PhArmacoLogy (OPAL) was a clinical survey of the sociodemographic characteristics, history and consequences of pathology associated with methadone maintenance treatment response and current addictive comorbidities. A subgroup of 72 methadone patients was genotyped. RESULTS When comparing the three CYP2B6 genotype groups, the methadone (R)- and (S)-methadone enantiomer concentrations/doses (concentrations relative to doses) were different (P = .029, P = .0019). The CYP2D6 phenotypes did not seem to be relevant with regard to methadone levels. On multivariate analysis, neither the CYP2B6 genotype nor the CYP2D6 phenotype explained the (R)-methadone concentration/dose values (P = .92; P = .86); the (S)-methadone concentration/dose values (P = .052; P = .95 [although there was a difference between the TT group and GT and GG groups {P = .019}]); or opiate cessation (P = .12; P = .90). CONCLUSION The genotyping of CYP2B6 G516T could be an interesting tool to explore methadone intervariability.
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Affiliation(s)
- Caroline Victorri-Vigneau
- INSERM UMR_S1178, Team "Depression and Antidepressants", Medicine Faculty, CESP, Paris-Sud University, Le Kremlin Bicêtre, France.,INSERM UMR 1246, SPHERE, Methods in Patient-Centered Outcomes and Health Research, Nantes and Tours University, Nantes and Tours, France.,Clinical Pharmacology Department, CHU Nantes, Nantes, France
| | - Céline Verstuyft
- INSERM UMR_S1178, Team "Depression and Antidepressants", Medicine Faculty, CESP, Paris-Sud University, Le Kremlin Bicêtre, France.,Molecular Genetics, Pharmacogenetics and Hormonology Departments, Bicêtre Hospital, Group Paris-Sud, AP-HP, Le Kremlin Bicêtre, France
| | - Régis Bouquié
- Clinical Pharmacology Department, CHU Nantes, Nantes, France
| | - Edouard-Jules Laforgue
- INSERM UMR 1246, SPHERE, Methods in Patient-Centered Outcomes and Health Research, Nantes and Tours University, Nantes and Tours, France.,Clinical Pharmacology Department, CHU Nantes, Nantes, France.,Addictology and Psychiatry Department, CHU Nantes, Nantes, France
| | - Jean-Benoit Hardouin
- INSERM UMR 1246, SPHERE, Methods in Patient-Centered Outcomes and Health Research, Nantes and Tours University, Nantes and Tours, France
| | | | | | - Corine Dano
- Addictology department, CHU Angers, Angers, France
| | - Gaëlle Challet-Bouju
- INSERM UMR 1246, SPHERE, Methods in Patient-Centered Outcomes and Health Research, Nantes and Tours University, Nantes and Tours, France.,Addictology and Psychiatry Department, CHU Nantes, Nantes, France
| | - Marie Grall-Bronnec
- INSERM UMR 1246, SPHERE, Methods in Patient-Centered Outcomes and Health Research, Nantes and Tours University, Nantes and Tours, France.,Addictology and Psychiatry Department, CHU Nantes, Nantes, France
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Ribeiro C, Santos C, Gonçalves V, Ramos A, Afonso C, Tiritan ME. Chiral Drug Analysis in Forensic Chemistry: An Overview. Molecules 2018; 23:E262. [PMID: 29382109 PMCID: PMC6017579 DOI: 10.3390/molecules23020262] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/19/2018] [Accepted: 01/25/2018] [Indexed: 12/11/2022] Open
Abstract
Many substances of forensic interest are chiral and available either as racemates or pure enantiomers. Application of chiral analysis in biological samples can be useful for the determination of legal or illicit drugs consumption or interpretation of unexpected toxicological effects. Chiral substances can also be found in environmental samples and revealed to be useful for determination of community drug usage (sewage epidemiology), identification of illicit drug manufacturing locations, illegal discharge of sewage and in environmental risk assessment. Thus, the purpose of this paper is to provide an overview of the application of chiral analysis in biological and environmental samples and their relevance in the forensic field. Most frequently analytical methods used to quantify the enantiomers are liquid and gas chromatography using both indirect, with enantiomerically pure derivatizing reagents, and direct methods recurring to chiral stationary phases.
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Affiliation(s)
- Cláudia Ribeiro
- Institute of Research and Advanced Training in Health Sciences and Technologies , Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal.
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal.
| | - Cristiana Santos
- Institute of Research and Advanced Training in Health Sciences and Technologies , Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal.
| | - Valter Gonçalves
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Ana Ramos
- Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), Faculty of Engineering of the University of Porto, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal.
| | - Carlos Afonso
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal.
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Maria Elizabeth Tiritan
- Institute of Research and Advanced Training in Health Sciences and Technologies , Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), Rua Central de Gandra, 1317, 4585-116 Gandra PRD, Portugal.
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal.
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
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Chiang YC, Wang RY, Huang CL, Chen SH, Ho WJ, Lane HY, Ho IK, Yang HT, Ma WL. Reduced dosing and liability in methadone maintenance treatment by targeting oestrogen signal for morphine addiction. J Cell Mol Med 2017; 21:3552-3564. [PMID: 28699698 PMCID: PMC5706516 DOI: 10.1111/jcmm.13266] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Accepted: 05/02/2017] [Indexed: 11/29/2022] Open
Abstract
Methadone maintenance treatment (MMT) is the major tapering therapy for morphine addictive patients. There have gender differences reported in response to MMT. This study discovered that the estrogen‐response element single nucleotide polymorphism (ERE‐SNP; rs16974799, C/T) of cytochrome 2B6 gene (cyp2b6; methadone catabolic enzyme) responded differently to MMT dosing. Oestradiol was associated with high MMT dosing, high enantiomer (R‐ or S‐) of 2‐ethylidene‐1,5‐dimethyl‐3,3‐dipheny‐pyrrolidine (EDDP; methadone metabolite) to methadone ratio and increased drug‐seeking behaviour, implicating oestradiol‐CYP‐EDDP/methadone axis decreasing MMT efficacy. In mouse model, oestrogen mitigates methadone antinociceptive response, facilitates methadone catabolism and up‐regulates methadone‐associated metabolizing enzymes. Oestrogen also ablates chronic methadone administration‐induced rewarding response. Mechanism dissection revealed the CC genotype of CYP2B6‐ERE‐SNP exerts higher ERE sequence alignment score, higher estrogenic response as compared to TT genotype. At last, preclinical study via targeting estrogen signal that tamoxifen (TMX; selective estrogen receptor modulator, SERM) could facilitate the tolerance phase rewarding response of methadone. Strikingly, TMX also reduces tapering/abstinence phases methadone liability in mice. In conclusion, this study demonstrates altering methadone metabolism through targeting estrogen signals might be able to free morphine addictive patients from the addiction of opioid replacement therapy. Therefore, the add‐on therapy clinical trial introducing SERM in MMT regimen is suggested.
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Affiliation(s)
- Yao-Chang Chiang
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan.,Department of Nursing, Division of Basic Medical Sciences, Chang Gong University of Science and Technology, Chiayi County, Taiwan
| | - Ruey-Yun Wang
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan.,Department of Public Health, China Medical University, Taichung, Taiwan
| | - Chieh-Liang Huang
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan.,Department of Psychiatry, China Medical University Hospital, Taichung, Taiwan
| | - Shue-Hwa Chen
- Sex Hormone Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Wen-Jing Ho
- Sex Hormone Research Center, China Medical University Hospital, Taichung, Taiwan
| | - Hsien-Yuan Lane
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan.,Department of Psychiatry, China Medical University Hospital, Taichung, Taiwan.,Department of Nutrition, China Medical University, Taichung, Taiwan
| | - Ing-Kang Ho
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan
| | - Hwei-Ting Yang
- Graduate Institution of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Wen-Lung Ma
- Center for Drug Abuse and Addiction, Brain Disease Research Center, China Medical University, Taichung, Taiwan.,Department of Psychiatry, China Medical University Hospital, Taichung, Taiwan.,Sex Hormone Research Center, China Medical University Hospital, Taichung, Taiwan.,Department of Nursing, Asia University, Taichung, Taiwan
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10
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Rong L, Liu Q, Wang J, Zeng H, Yang H, Chen X. Enantioseparation of (RS)-ibuprofen by closed recycling high-speed counter-current chromatography using hydroxypropyl-β-cyclodextrin as chiral selector. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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George R, Lobb M, Haywood A, Khan S, Hardy J, Good P, Hennig S, Norris R. Quantitative determination of the enantiomers of methadone in human plasma and saliva by chiral column chromatography coupled with mass spectrometric detection. Talanta 2016; 149:142-148. [DOI: 10.1016/j.talanta.2015.11.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/17/2015] [Accepted: 11/17/2015] [Indexed: 10/22/2022]
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