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Bayatloo MR, Tabani H, Nojavan S, Alexovič M, Ozkan SA. Liquid-Phase Microextraction Approaches for Preconcentration and Analysis of Chiral Compounds: A Review on Current Advances. Crit Rev Anal Chem 2022; 53:1623-1637. [PMID: 35175878 DOI: 10.1080/10408347.2022.2038072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Chirality is a critical issue in pharmaceutics, forensic chemistry, therapeutic drug monitoring, doping control, toxicology, or environmental investigations as enantiomers of a chiral compound can exhibit different activities, i.e., one enantiomer can have the desired effect while the other one can be inactive or even toxic. To monitor enantioselective metabolism or toxicokinetic/toxicodynamic mechanisms in extremely low content in biological or environmental matrices, sample preparation is vital. The present review describes current status of development of liquid-phase microextraction approaches such as hollow fiber liquid-phase microextraction (HF-LPME), electromembrane extraction (EME), dispersive liquid-liquid microextraction (DLLME), and supramolecular solvent-based microextraction (SSME), used for sample preparation of enantiomers/chiral compounds. The advantages and limitations of the above techniques are discussed. Attention is also focused on chiral separation approaches commonly applied to study the stereo-selective metabolism or toxicokinetic/toxicodynamic mechanisms of enantiomers in the biological and environmental samples.
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Affiliation(s)
- Mohammad Reza Bayatloo
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., Evin, Tehran, Iran
| | - Hadi Tabani
- Department of Environmental Geology, Research Institute of Applied Sciences (ACECR), Shahid Beheshti University, Tehran, Iran
| | - Saeed Nojavan
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., Evin, Tehran, Iran
| | - Michal Alexovič
- Department of Medical and Clinical Biophysics, Faculty of Medicine, University of P.J. Šafárik in Košice, Košice, Slovakia
| | - Sibel A Ozkan
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
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2
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Ghorbani M, Mohammadi P, Keshavarzi M, Ziroohi A, Mohammadi M, Aghamohammadhasan M, Pakseresht M. Developments of Microextraction (Extraction) Procedures for Sample Preparation of Antidepressants in Biological and Water Samples, a Review. Crit Rev Anal Chem 2021; 53:1285-1312. [PMID: 34955046 DOI: 10.1080/10408347.2021.2018648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Antidepressants are an important class of drugs to treat various types of depression. The determination of antidepressants is crucial in biological samples to control adverse effects in humans and study pharmacokinetics and bioavailability. Direct measurement of antidepressants in biological and water samples is a considerable challenge for analysts due to their low concentration, the high matrix effects of real samples, and the presence of metabolites of these drugs in biological samples. The challenge leads to using sample preparation processes as a critical step in determining antidepressants. Extraction and microextraction procedures have been widely utilized as sample preparation procedures for these drugs. The purposes of extraction or microextraction methods for antidepressant medications are to preconcentrate the analyte, reduce the matrix effects, increase the selectivity of the procedures, and convert the sample to a suitable format for introducing it into detection systems. In the review, the various extraction and microextraction methods of these drugs in biological, real water, and wastewater samples were investigated. The theory of each technique was briefly addressed to understand the features and factors affecting each method. The extraction and microextraction methods were classified based on their application for antidepressants, and the advantages and disadvantages of each technique were reviewed. The new developments to overcome the limitations of each procedure were discussed. The investigation indicated the number of applications of liquid-phase microextraction for extracting antidepressants has been almost equal to that of solid-phase microextraction.
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Affiliation(s)
- Mahdi Ghorbani
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Parisa Mohammadi
- Cellular and Molecular Research Center, Sabzevar University of Medical Sciences, Faculty of Health, Sabzevar, Iran
| | - Majid Keshavarzi
- Cellular and Molecular Research Center, Sabzevar University of Medical Sciences, Faculty of Health, Sabzevar, Iran
| | - Aliakbar Ziroohi
- Department of biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Morteza Mohammadi
- School of Medicine, Sechenov University of Medical Sciences, Moscow, Russia
| | | | - Maryam Pakseresht
- Department of Chemistry, Faculty of Arts and Sciences, Near East University, Nicosia, Cyprus
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3
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Gjelstad A. Three-phase hollow fiber liquid-phase microextraction and parallel artificial liquid membrane extraction. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.01.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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4
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A review of the application of hollow-fiber liquid-phase microextraction in bioanalytical methods – A systematic approach with focus on forensic toxicology. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1108:32-53. [DOI: 10.1016/j.jchromb.2019.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/10/2018] [Accepted: 01/08/2019] [Indexed: 02/07/2023]
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5
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Nozohour Yazdi M, Yamini Y. Simultaneous speciation of inorganic chromium(III) and chromium(VI) by hollow‐fiber‐based liquid‐phase microextraction coupled with HPLC–UV. J Sep Sci 2017; 40:919-926. [DOI: 10.1002/jssc.201600917] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/28/2016] [Accepted: 12/02/2016] [Indexed: 01/22/2023]
Affiliation(s)
| | - Yadollah Yamini
- Department of Chemistry Faculty of Sciences Tarbiat Modares University Tehran Iran
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6
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Aladaghlo Z, Fakhari AR, Hasheminasab KS. Application of electromembrane extraction followed by corona discharge ion mobility spectrometry analysis as a fast and sensitive technique for determination of tricyclic antidepressants in urine samples. Microchem J 2016. [DOI: 10.1016/j.microc.2016.05.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Alexovič M, Horstkotte B, Solich P, Sabo J. Automation of static and dynamic non-dispersive liquid phase microextraction. Part 2: Approaches based on impregnated membranes and porous supports. Anal Chim Acta 2016; 907:18-30. [DOI: 10.1016/j.aca.2015.11.046] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/29/2015] [Accepted: 11/30/2015] [Indexed: 10/22/2022]
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8
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Yamini Y, Esrafili A, Ghambarian M. Online Injection-Based Hollow Fiber Liquid-Phase Microextraction–High-Performance Liquid Chromatography as a Fully Automatic Sample Processing for Phthalate Esters Analysis. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0247-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Carasek E, Merib J. Membrane-based microextraction techniques in analytical chemistry: A review. Anal Chim Acta 2015; 880:8-25. [DOI: 10.1016/j.aca.2015.02.049] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 02/13/2015] [Accepted: 02/17/2015] [Indexed: 11/16/2022]
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Salt-assisted LLE combined with field-amplified sample stacking in CE for improved determination of beta blocker drugs in human urine. Bioanalysis 2014; 6:319-34. [DOI: 10.4155/bio.13.303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Background: A simple and sensitive CE method was developed and validated for the analysis of some beta blockers in human urine. Methods: In this study, salting-out assisted LLE combined with field-amplified sample stacking method was employed for biological sample clean-up and sensitivity enhancement in CE. Results: Under the optimal conditions good linearity (r2 ≥0.998) was obtained, within 0.025–1 µg/ml for propranolol and metoprolol, and within 0.05–1 µg/ml for carvedilol in urine samples. LODs and LLOQs ranged from 0.005 to 0.015 µg/ml, and from 0.025 to 0.05 µg/ml, respectively. The RSDs of intra- and inter-day analysis of examined compounds were less than 4.0%. The recoveries were in the range of 98–119%. Conclusion: The validated method is successfully applied to determine propranolol, metoprolol and carvedilol in human urine samples obtained from the patients who received these drugs.
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Sobhi HR, Esrafili A, Farahani H, Gholami M, Baneshi MM. Simultaneous derivatization and extraction of nitrophenols in soil and rain samples using modified hollow-fiber liquid-phase microextraction followed by gas chromatography-mass spectrometry. ENVIRONMENTAL MONITORING AND ASSESSMENT 2013; 185:9055-9065. [PMID: 23644691 DOI: 10.1007/s10661-013-3235-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 04/25/2013] [Indexed: 06/02/2023]
Abstract
A simple and sensitive method based on a modified hollow-fiber liquid-phase microextraction followed by gas chromatography-mass spectrometry has been successfully developed for the extraction and simultaneous derivatization of some nitrophenols (NPs) in soil and rain samples. Microwave-assisted solvent extraction was used for the extraction of NPs from the soil, while the rain sample was directly applied to the previously mentioned method. Briefly, in this method, the analytes were extracted from aqueous samples into a thin layer of organic solvent (dodecane + 10% tri-n-octylphosphine oxide) sustained in the pores of a porous hollow fiber. Then, they were back-extracted using a small volume of organic acceptor solution (25 μl; 10 mg/L N-methyl-N-(trimethylsilyl)trifluoroacetamide, as derivatization reagent, in acetonitrile) that was located inside the lumen of the hollow fiber. Under the optimized extraction conditions, enrichment factors of 255 to 280 and limits of detection of 0.1 to 0.2 μg/L (S/N = 3) with dynamic linear ranges of 1-100 μg/L were obtained for the analytes. The accuracy of the approach was tested by the relative recovery experiments on spiked samples, with results ranging from 93 to 113%. The method was shown to be rapid, cost-effective, and potentially interesting for screening purposes.
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12
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Carrier mediated transport solvent bar microextraction for preconcentration and determination of dexamethasone sodium phosphate in biological fluids and bovine milk samples using response surface methodology. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 931:148-56. [DOI: 10.1016/j.jchromb.2013.05.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 05/12/2013] [Accepted: 05/21/2013] [Indexed: 11/18/2022]
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13
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Srinivas NR. Role of Stereoselective Assays in Bioequivalence Studies of Racemic Drugs: Have We Reached a Consensus? J Clin Pharmacol 2013; 44:115-9. [PMID: 14747419 DOI: 10.1177/0091270003262098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The existence of stereoselectivity in metabolism and drug disposition, coupled with the existence of genetic polymorphisms and modulation of enantiomeric kinetics via special delivery systems, provides some compulsion to assess bioequivalence using stereoselective data. However, examination of the literature suggests that nonstereoselective data are commonly used for the bioequivalence assessment of drug racemates.
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Affiliation(s)
- Nuggehally R Srinivas
- Dr. Reddy's Research Laboratories-Discovery Research, Bollaram Road, Miyapur, Hyderabad, India
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Hollow-fiber liquid-phase microextraction and chiral LC–MS/MS analysis of venlafaxine and its metabolites in plasma. Bioanalysis 2013; 5:721-30. [DOI: 10.4155/bio.13.22] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: An enantioselective analytical method was developed and validated for determination of venlafaxine and its metabolites O-desmethylvenlafaxine and N-desmethylvenlafaxine in plasma samples. The method employed LC–MS/MS analysis and hollow-fiber liquid-phase microextraction (HF LPME) for sample preparation. Results: After HF LPME optimization the following condition was established: sample volume of 4 ml, sample agitation at 1750 rpm, 20 min of extraction, 0.1 mol/l acetic acid as acceptor phase, 1-octanol as organic phase and donor phase pH adjustment to 10. Under these conditions, the method was linear over the concentration range of 5–500 ng/ml with quantification limits of 5 ng/ml. Conclusion: The use of HF LPME for sample preparation provided suitable recoveries, efficient clean-up and low consumption of organic solvent.
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Sarafraz-Yazdi A, Abedi MR, Es'haghi Z. PRE-CONCENTRATION AND DETERMINATION OF β-BLOCKERS USING CARBON NANOTUBE-ASSISTED PSEUDO-STIRBAR HOLLOW FIBER SOLID-/LIQUID-PHASE MICROEXTRACTION AND HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY WITH FLUORESCENCE DETECTION. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2012.673212] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ali Sarafraz-Yazdi
- a Department of Chemistry , Ferdowsi University of Mashhad , I.R. of Iran
| | - Mohamad Reza Abedi
- a Department of Chemistry , Ferdowsi University of Mashhad , I.R. of Iran
- b Department of Applied Chemistry, Quchan Branch , Islamic Azad University , Quchan , I.R. of Iran
| | - Zarrin Es'haghi
- c Department of Chemistry , Payame Noor University , Tehran , I.R. of Iran
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16
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Esrafili A, Yamini Y, Ghambarian M, Ebrahimpour B. Automated preconcentration and analysis of organic compounds by on-line hollow fiber liquid-phase microextraction-high performance liquid chromatography. J Chromatogr A 2012; 1262:27-33. [PMID: 22999199 DOI: 10.1016/j.chroma.2012.09.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Revised: 09/01/2012] [Accepted: 09/03/2012] [Indexed: 10/27/2022]
Abstract
The present work describes the first automated instrument, based on on-line hollow fiber liquid-phase microextraction (HF-LPME)-high performance liquid chromatography (HPLC), for the preconcentration and determination of organic compounds in various matrices. Using an automated syringe pump for loading the supported liquid membrane and acceptor solvents, a platform lift for moving the sample vial, a sampling loop for on-line injection of the extract to HPLC, along with an electronic board with an AVR microcontroller for storage of data and instrument programs, a sample preparation-HPLC method was developed that allowed sample extraction and extract injection to be carried out completely automatically. Pyridine and pyridine derivatives were chosen for the development and for testing the applicability of the automated instrument. The limits of detection (3 times the S/N) ranged from 0.5 to 1.0 μgL(-1). Effective preconcentration of the analytes was also achieved (preconcentration factors of between 40 and 220). The main advantages of the method developed are minimum sample manipulation, full automation, suitable extraction time, low solvent consumption, and ease of use. The applicability of the on-line automated HF-LPME/HPLC-UV instrument was validated for quantitative extraction and determination of pyridines in cigarette smoke.
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Affiliation(s)
- Ali Esrafili
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
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17
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Kanimozhi S, Basheer C, Neveliappan S, Ang K, Xue F, Lee HK. Investigation of bioaccumulation profile of oestrogens in zebrafish liver by hollow fibre protected liquid phase microextraction with gas chromatography–mass spectrometric detection. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 909:37-41. [DOI: 10.1016/j.jchromb.2012.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Revised: 09/24/2012] [Accepted: 10/03/2012] [Indexed: 01/07/2023]
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18
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Kohler I, Schappler J, Rudaz S. Microextraction techniques combined with capillary electrophoresis in bioanalysis. Anal Bioanal Chem 2012; 405:125-41. [PMID: 22965532 DOI: 10.1007/s00216-012-6367-y] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 08/14/2012] [Accepted: 08/19/2012] [Indexed: 11/28/2022]
Abstract
Over the past two decades, many environmentally sustainable sample-preparation techniques have been proposed, with the objective of reducing the use of toxic organic solvents or substituting these with environmentally friendly alternatives. Microextraction techniques (MEs), in which only a small amount of organic solvent is used, have several advantages, including reduced sample volume, analysis time, and operating costs. Thus, MEs are well adapted in bioanalysis, in which sample preparation is mandatory because of the complexity of a sample that is available in small quantities (mL or even μL only). Capillary electrophoresis (CE) is a powerful and efficient separation technique in which no organic solvents are required for analysis. Combination of CE with MEs is regarded as a very attractive environmentally sustainable analytical tool, and numerous applications have been reported over the last few decades for bioanalysis of low-molecular-weight compounds or for peptide analysis. In this paper we review the use of MEs combined with CE in bioanalysis. The review is divided into two sections: liquid and solid-based MEs. A brief practical and theoretical description of each ME is given, and the techniques are illustrated by relevant applications.
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Affiliation(s)
- Isabelle Kohler
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Bd d'Yvoy 20, 1211 Geneva 4, Switzerland
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Farhadi K, Hatami M, Matin AA. Microextraction techniques in therapeutic drug monitoring. Biomed Chromatogr 2012; 26:972-89. [PMID: 22767149 DOI: 10.1002/bmc.2774] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 05/11/2012] [Indexed: 11/08/2022]
Abstract
Therapeutic drug monitoring (TDM), as part of clinical process of medical treatments, is commonly used to maintain 'therapeutic' drug concentrations. TDM is useful to identify the causes of unwanted or unexpected responses, to prevent unnecessary diagnostic testing, to improve clinical outcomes, and even to save lives. The determination of drug concentration in blood samples requires an excellent sample preparation procedure. Recent trends in sample preparation include miniaturization, automation, high-throughput performance, on-line coupling with analytical instruments and low-cost operation through extremely low or no solvent consumption. Microextraction techniques, such as liquid- and solid-phase microextraction, have these advantages over the traditional techniques. This paper reviews the recent developments in microextraction techniques used for drug monitoring in serum, plasma or blood samples.
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Affiliation(s)
- Khalil Farhadi
- Department of Chemistry, Faculty of Science, Urmia University, Iran.
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20
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Electromembrane extraction combined with gas chromatography for quantification of tricyclic antidepressants in human body fluids. Anal Chim Acta 2012; 725:51-6. [DOI: 10.1016/j.aca.2012.02.048] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2012] [Revised: 02/27/2012] [Accepted: 02/29/2012] [Indexed: 11/22/2022]
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21
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Developments in hollow fiber based liquid-phase microextraction: principles and applications. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0773-x] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Pena-Abaurrea M, Ramos L. Miniaturization of Analytical Methods. CHALLENGES IN GREEN ANALYTICAL CHEMISTRY 2011. [DOI: 10.1039/9781849732963-00107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This chapter highlights miniaturization in sample preparation as a valuable alternative for green analytical chemistry. The current state of the art is discussed on the basis of examples selected from representative application areas, including biomedical, environmental and food analysis, and involving conventional instrumental techniques for final determination of the target compounds. The emphasis is on those techniques and approaches that have already demonstrated their practicality by the analysis of real-life samples, and in particular on those dealing with the accurate determination of minor organic components. The potential of recent developments in this field for sample treatment simplification and complete hyphenation of analytical processes are discussed and the most pressing remaining limitations evaluated.
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Affiliation(s)
- Miren Pena-Abaurrea
- Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry CSIC, Juan de la Cierva 3, 28006 Madrid Spain
| | - Lourdes Ramos
- Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry CSIC, Juan de la Cierva 3, 28006 Madrid Spain
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Sensitive determination of phenylarsenic compounds based on a dual preconcentration method with capillary electrophoresis/UV detection. J Chromatogr A 2011; 1218:4779-87. [DOI: 10.1016/j.chroma.2011.05.058] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 05/13/2011] [Accepted: 05/17/2011] [Indexed: 11/17/2022]
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Abstract
Liquid-phase microextraction (LPME) emerged in the mid-to-late 1990s, facing up to the main shortcomings of the classical liquid-liquid extraction. Since its origin, this new technique has been in continuous development driven by its successful and widespread use in the analytical sciences. Its inherent properties, such as low sample volume requirement, high preconcentration factors achieved and excellent sample clean-up, make LPME a very useful technique for bioanalytical sample preparation. This review focuses on the main LPME-related techniques, predominantly single-drop microextraction and supported hollow-fiber LPME, paying particular attention to the bioanalytical applications. A general view of the essential trends, including the description of promising extraction modes and solvents, is also highlighted.
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Caslavska J, Thormann W. Stereoselective determination of drugs and metabolites in body fluids, tissues and microsomal preparations by capillary electrophoresis (2000–2010). J Chromatogr A 2011; 1218:588-601. [DOI: 10.1016/j.chroma.2010.08.072] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 08/20/2010] [Accepted: 08/25/2010] [Indexed: 10/19/2022]
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26
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Breadmore MC, Dawod M, Quirino JP. Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2008-2010). Electrophoresis 2010; 32:127-48. [PMID: 21171119 DOI: 10.1002/elps.201000412] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 09/15/2010] [Accepted: 09/16/2010] [Indexed: 01/22/2023]
Abstract
Capillary electrophoresis has been alive for over two decades now; yet, its sensitivity is still regarded as being inferior to that of more traditional methods of separation such as HPLC. As such, it is unsurprising that overcoming this issue still generates much scientific interest. This review continues to update this series of reviews, first published in Electrophoresis in 2007, with an update published in 2009 and covers material published through to June 2010. It includes developments in the fields of stacking, covering all methods from field-amplified sample stacking and large volume sample stacking, through to ITP, dynamic pH junction and sweeping. Attention is also given to on-line or in-line extraction methods that have been used for electrophoresis.
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Affiliation(s)
- Michael C Breadmore
- Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Hobart, TAS, Australia.
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Xu L, Basheer C, Lee HK. Solvent-bar microextraction of herbicides combined with non-aqueous field-amplified sample injection capillary electrophoresis. J Chromatogr A 2010; 1217:6036-43. [DOI: 10.1016/j.chroma.2010.07.072] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 07/26/2010] [Accepted: 07/28/2010] [Indexed: 12/22/2022]
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Highly sensitive chiral analysis of amino acids by in-line single drop microextraction and capillary electrophoresis with laser-induced fluorescence detection. Anal Chim Acta 2010; 677:37-42. [DOI: 10.1016/j.aca.2010.03.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2009] [Revised: 03/02/2010] [Accepted: 03/24/2010] [Indexed: 11/18/2022]
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29
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Wang GY, Chen J, Shi YP. Hollow-fiber liquid-phase microextraction combined with high-performance liquid chromatography for analysis of melamine in milk products. ACTA CHROMATOGR 2010. [DOI: 10.1556/achrom.22.2010.2.12] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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30
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Simultaneous extraction of acidic and basic drugs at neutral sample pH: a novel electro-mediated microextraction approach. J Chromatogr A 2010; 1217:6661-7. [PMID: 20488447 DOI: 10.1016/j.chroma.2010.04.066] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 04/20/2010] [Accepted: 04/22/2010] [Indexed: 11/22/2022]
Abstract
The simultaneous extraction of acidic and basic analytes from a particular sample is a challenging task. In this work, electromembrane extraction (EME) of acidic non-steroidal anti-inflammatory drugs and basic β-blockers in a single step was carried out for the first time. It was shown that by designing an appropriate compartmentalized membrane envelope, the two classes of drugs could be electrokinetically extracted by a 300 V direct current electrical potential. This method required only a very short 10-min extraction time from a pH-neutral sample, with a small amount (50 μL) of organic solvent (1-octanol) as the acceptor phase. Analysis was carried out using gas chromatography-mass spectrometry after derivatization of the analytes. Extraction parameters such as extraction time, applied voltage, pH range, and concentration of salt added were optimized. The proposed EME technique provided good linearity with correlation coefficients from 0.982 to 0.997 over a concentration range of 1-200 μg L⁻¹. Detection limits of the drugs ranged between 0.0081 and 0.26 μg L⁻¹, while reproducibility ranged from 6 to 13% (n=6). Finally, the application of the new method to wastewater samples was demonstrated.
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31
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Hollow fiber-liquid-phase microextraction of fungicides from orange juices. J Chromatogr A 2010; 1217:1989-94. [DOI: 10.1016/j.chroma.2010.01.077] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 01/20/2010] [Accepted: 01/27/2010] [Indexed: 11/20/2022]
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Choi K, Kim J, Jang YO, Chung DS. Direct chiral analysis of primary amine drugs in human urine by single drop microextraction in-line coupled to CE. Electrophoresis 2010; 30:2905-11. [PMID: 19691052 DOI: 10.1002/elps.200800829] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Three-phase single drop microextraction (SDME) was in-line coupled to chiral CE of weakly basic amine compounds including amphetamine. SDME was used for the matrix isolation and sample preconcentration in order to directly analyze urine samples with the minimal pretreatment of adding NaOH. A small drop of an acidic aqueous acceptor phase covered with a thin layer of octanol was formed at the tip of a capillary by simple manipulation of the liquid handling functions of a commercial CE instrument. While the saline matrix of the urine sample was blocked by the octanol layer, the basic analytes in a basic aqueous donor phase were concentrated into the acidic acceptor drop through the octanol layer by the driving force of the pH difference between the two aqueous phases. The enantiomers of the enriched amines were resolved by using (+)-(18-crown-6)-tetracarboxylic acid as a chiral selector for the subsequent CE separation. From 10 min SDME with the agitation of the donor phase by a small stirrer retrofit to the CE instrument, enrichment factors were about a 1000-fold, yielding the LOD of 0.5 ng/mL for amphetamine. This low LOD value as well as the convenience of in-line coupled SDME make the proposed scheme well suited for the demanding chiral analysis of amphetamine-type stimulants.
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Affiliation(s)
- Kihwan Choi
- Department of Chemistry, Seoul National University, Seoul, Korea
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33
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da Fonseca P, Bonato PS. Chiral HPLC analysis of venlafaxine metabolites in rat liver microsomal preparations after LPME extraction and application to an in vitro biotransformation study. Anal Bioanal Chem 2009; 396:817-24. [DOI: 10.1007/s00216-009-3271-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2009] [Revised: 10/27/2009] [Accepted: 10/27/2009] [Indexed: 10/20/2022]
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34
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Solid drop based liquid-phase microextraction. J Chromatogr A 2009; 1217:2337-41. [PMID: 19962710 DOI: 10.1016/j.chroma.2009.11.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 11/10/2009] [Accepted: 11/10/2009] [Indexed: 11/21/2022]
Abstract
Solid drop based liquid-phase microextraction (SDLPME) is a novel sample preparation technique possessing obvious advantages of simple operation with a high pre-concentration factor, low cost and low consumption of organic solvent. SDLPME coupled with gas chromatography (GC), high-performance liquid chromatography (HPLC), and atomic absorption spectrometry (AAS) has been widely applied to the analyses of a different variety of samples. The basic principles, parameters affecting the extraction efficiency, and the latest applications of SDLPME are reviewed in this article.
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35
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Recent developments and applications of microextraction techniques in drug analysis. Anal Bioanal Chem 2009; 396:339-64. [DOI: 10.1007/s00216-009-3076-2] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 08/12/2009] [Accepted: 08/17/2009] [Indexed: 10/20/2022]
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36
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Hollow fiber supported ionic liquid membrane microextraction for determination of sulfonamides in environmental water samples by high-performance liquid chromatography. J Chromatogr A 2009; 1216:6259-66. [DOI: 10.1016/j.chroma.2009.06.025] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Revised: 05/25/2009] [Accepted: 06/05/2009] [Indexed: 11/20/2022]
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37
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Chiral determination of antidepressant drugs and their metabolites in biological samples. Bioanalysis 2009; 1:221-37. [DOI: 10.4155/bio.09.13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The determination of chiral drugs and their metabolites in biological samples is key to gaining a full understanding of enantioselective drug action and disposition, as well as establishing the advantages of using racemate or isolated enantiomers. In this review, methods published in the last 8 years regarding the analysis of chiral antidepressant drugs and their metabolites in biological fluids (e.g., plasma, urine and cerebrospinal fluid) are reviewed. The importance and interest in analyzing the enantiomers of the active compound and its metabolites in biological samples are also discussed.
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Lin SC, Whang CW. Capillary electrophoretic separation of tricyclic antidepressants using a polymer-coated capillary and β-cyclodextrin as an electrolyte additive. J Sep Sci 2008; 31:3921-9. [DOI: 10.1002/jssc.200800426] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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de Santana FJM, Lanchote VL, Bonato PS. Capillary electrophoretic chiral determination of mirtazapine and its main metabolites in human urine after enzymatic hydrolysis. Electrophoresis 2008; 29:3924-32. [DOI: 10.1002/elps.200800053] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Vera Lúcia Lanchote
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Pierina Sueli Bonato
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
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Lee J, Lee HK, Rasmussen KE, Pedersen-Bjergaard S. Environmental and bioanalytical applications of hollow fiber membrane liquid-phase microextraction: A review. Anal Chim Acta 2008; 624:253-68. [DOI: 10.1016/j.aca.2008.06.050] [Citation(s) in RCA: 346] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 06/26/2008] [Accepted: 06/27/2008] [Indexed: 11/30/2022]
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41
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Pedersen-Bjergaard S, Rasmussen KE. Liquid-phase microextraction with porous hollow fibers, a miniaturized and highly flexible format for liquid–liquid extraction. J Chromatogr A 2008; 1184:132-42. [PMID: 17889886 DOI: 10.1016/j.chroma.2007.08.088] [Citation(s) in RCA: 353] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 08/24/2007] [Accepted: 08/31/2007] [Indexed: 11/16/2022]
Abstract
Since 1999, substantial research has been devoted to the development of liquid-phase microextraction (LPME) based on porous hollow fibers. With this technology, target analytes are extracted from aqueous samples, through a thin supported liquid membrane (SLM) sustained in the pores in the wall of a porous hollow fiber, and further into a microL volume of acceptor solution placed inside the lumen of the hollow fiber. After extraction, the acceptor solution is directly subjected to a final chemical analysis by liquid chromatography (HPLC), gas chromatography (GC), capillary electrophoresis (CE), or mass spectrometry (MS). In this review, LPME will be discussed with focus on extraction principles, historical development, fundamental theory, and performance. Also, major applications have been compiled, and recent forefront developments will be discussed.
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42
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Wille SMR, Van Hee P, Neels HM, Van Peteghem CH, Lambert WE. Comparison of electron and chemical ionization modes by validation of a quantitative gas chromatographic-mass spectrometric assay of new generation antidepressants and their active metabolites in plasma. J Chromatogr A 2007; 1176:236-45. [PMID: 18022628 DOI: 10.1016/j.chroma.2007.10.096] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Revised: 10/25/2007] [Accepted: 10/29/2007] [Indexed: 11/30/2022]
Abstract
A gas chromatographic-mass spectrometric method (GC-MS) for the simultaneous determination of the 'new' antidepressants (mirtazapine, viloxazine, venlafaxine, trazodone, citalopram, mianserin, reboxetine, fluoxetine, fluvoxamine, sertraline, maprotiline, melitracen, paroxetine) and their active metabolites (desmethylmirtazapine, O-desmethylvenlafaxine, m-chlorophenylpiperazine, desmethylcitalopram, didesmethylcitalopram, desmethylmianserin, desmethylfluoxetine, desmethylsertraline, desmethylmaprotiline) in plasma using different ionization modes was developed and validated. Sample preparation consisted of a strong cation exchange mechanism and derivatisation with heptafluorobutyrylimidazole. The GC separation was performed in 24.8 min. Identification and quantification were based on selected ion monitoring in electron (EI) and chemical ionization (CI) modes. Calibration by linear and quadratic regression for electron and chemical ionization, respectively, utilized deuterated internal standards and a weighing factor 1/x(2). Limits of quantitation were established between 5 and 12.5 ng/ml in EI and positive ionization CI (PICI), and 1 and 6.25 ng/ml in negative ionization CI (NICI). During validation stability, sensitivity, precision, accuracy, recovery, and selectivity were evaluated for each ionization mode and were demonstrated to be acceptable for most compounds. While it is clear that not all compounds can be quantitated either due to chromatographic (trazodone) or derivatisation problems (O-desmethylvenlafaxine), this method can quantitate most new antidepressants (ADs) in the therapeutic range using EI. PICI and NICI lead to higher selectivity. Moreover, NICI is of interest for small sample volumes and high sensitivity requirements. This paper draws the attention to the pros and cons of the different ionization modes in the GC-MS analysis of these antidepressants in plasma.
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Affiliation(s)
- Sarah M R Wille
- Laboratory of Toxicology, Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium
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43
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Shariati S, Yamini Y, Darabi M, Amini M. Three phase liquid phase microextraction of phenylacetic acid and phenylpropionic acid from biological fluids. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 855:228-35. [PMID: 17537682 DOI: 10.1016/j.jchromb.2007.05.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 04/28/2007] [Accepted: 05/04/2007] [Indexed: 11/28/2022]
Abstract
Three phase liquid phase microextraction (three phase LPME) technique coupled with HPLC-UV has been applied as a sensitive and efficient sample preparation method to determine phenylacetic acid (PAA) as a biomarker of depressive disorders and phenylpropionic acid (PPA) in biological fluids. The compounds were extracted from 3.0 ml aqueous solution with the adjustment of pH at a fixed value in the range of 2.0-3.5 (donor solution) into an organic phase (1-hexanol) layered on the surface of the donor solution and finally back-extracted into 4.0 microl of the acceptor microdrop (pH 11.1) located at the end of the microsyringe needle. After a prescribed back-extraction time, the acceptor microdrop was withdrawn into the microsyringe and then directly injected into the HPLC system. In order to achieve maximum extraction efficiency, different parameters affecting the extraction conditions were optimized. At the optimum conditions (donor solution: 2.3M Na(2)SO(4), pH 2.0-3.5; organic membrane: 95 microl of 1-hexanol; acceptor solution: 4.0 microl of 0.1M NH(3)/NH(4)(+) with pH 11.1; donor solution temperature: 45-50 degrees C; extraction time: 20 min and back-extraction time: 12 min), up to 110-fold enrichment factor was obtained. The calibration curve for these analytes was linear in the range of 1-5000 microg/l with r(2)>0.998. The intraday and interday RSD% were below 6.5% and the limits of detection (LODs) for both analytes were 0.2 microg/l (based on S/N=3). The proposed technique is a low cost, simple and sensitive method with highly clean-up effect. Finally, this technique was successfully utilized for the detection of target analytes in human urine, serum and plasma.
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Affiliation(s)
- Shahab Shariati
- Department of Chemistry, Faculty of Sciences, Tarbiat Modarres University, Tehran, Iran
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44
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Bårdstu KF, Ho TS, Rasmussen KE, Pedersen-Bjergaard S, Jönsson JA. Supported liquid membranes in hollow fiber liquid-phase microextraction (LPME) – Practical considerations in the three-phase mode. J Sep Sci 2007; 30:1364-70. [PMID: 17623480 DOI: 10.1002/jssc.200600486] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In this work, three-phase liquid-phase microextraction (LPME) based on a supported liquid membrane (SLM) sustained in the wall of a hollow fiber was investigated with special focus on optimization of the experimental procedures in terms of recovery and repeatability. Recovery data for doxepin, amitriptyline, clomipramine, and mianserin were in the range of 67.8-79.8%. Within-day repeatability data for the four basic drugs were in the range of 4.1-7.7%. No single factor was found to be responsible for these variations, and the variability was caused by several factors related to the LPME extractions as well as to the final HPLC determination. Although the volume of the SLM varied within 0.4-3.1% RSD depending on the preparation procedure, and the volume of the acceptor solution varied within 4.8% RSD, both recoveries and repeatability were found to be relative insensitive to these variations. Thus, the handling of microliters of liquid in LPME was not a very critical factor, and the preparation of the SLM was accomplished in several different ways with comparable performance. Reuse of hollow fibers was found to suffer from matrix effects due to built-up of analytes in the SLM, whereas washing of the hollow fibers in acetone was beneficial in terms of recovery, especially for the extraction of the most hydrophobic substances. Several of the organic solvents used in the literature as SLM suffered from poor long-term stability, but silicone oil AR 20 (polyphenylmethylsiloxane), 2-nitrophenyl octyl ether (NPOE), and dodecyl acetate (DDA) all extracted with unaltered performance even after 60 days of storage at room temperature.
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45
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de Oliveira ARM, Cardoso CD, Bonato PS. Stereoselective determination of hydroxychloroquine and its metabolites in human urine by liquid-phase microextraction and CE. Electrophoresis 2007; 28:1081-91. [PMID: 17295421 DOI: 10.1002/elps.200600420] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Liquid-phase microextraction based on polypropylene hollow fibers and CE were applied for the chiral determination of hydroxychloroquine (HCQ) and its metabolites (desethylchloroquine, DCQ; desethylhydroxychloroquine, DHCQ; bisdesethylchloroquine, BDCQ) in human urine. The analytes were extracted from 3 mL of urine spiked with the internal standard (metoprolol) and alkalinized with 250 muL of 2 M NaOH. The analytes were extracted into 1-octanol impregnated in the pores of the hollow fiber, and into an acid acceptor solution inside the hollow fiber. The electrophoretic separations were carried out in 100 mmol/L Tris buffer (pH adjusted to 9.0 with phosphoric acid) containing 1% w/v S-beta-CD and 30 mg/mL HP-beta-CD with a constant voltage of +18 kV. The method was linear over the concentration range of 10-1000 ng/mL for each HCQ stereoisomer and 21-333 ng/mL for each metabolite stereoisomer. Within-day and between-day assay precision and accuracy for the analytes were studied at three concentration levels for each stereoisomer and were lower than 15%. The developed method was applied for the determination of the cumulative urinary excretion of HCQ, DCQ, and DHCQ after oral administration of rac-HCQ to a health volunteer. The results obtained are in agreement with previous literature data.
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46
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Breadmore MC. Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips. Electrophoresis 2007; 28:254-81. [PMID: 17149782 DOI: 10.1002/elps.200600463] [Citation(s) in RCA: 160] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Poor sensitivity is considered to be one of the major limitations of electrophoretic separation methods, particularly when compared to traditional liquid chromatographic techniques. To address this issue, various in-line preconcentration techniques have been developed over the past 15 years, ranging in power and complexity, and there are now a number of well understood approaches routinely capable of providing a 10,000- to 100,000-fold increase in sensitivity, as well as several that can be pushed above a million. Furthermore, these have been achieved with particularly troublesome and often difficult samples, such as those having high salinity from a biological or environmental origin. This review will discuss the most common methods for improving the sensitivity of CE, CEC and microchip version of these, with particular attention to those approaches developed over the last five years.
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Affiliation(s)
- Michael C Breadmore
- Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia.
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47
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Zhang J, Lee HK. Application of liquid-phase microextraction and on-column derivatization combined with gas chromatography–mass spectrometry to the determination of carbamate pesticides. J Chromatogr A 2006; 1117:31-7. [PMID: 16626723 DOI: 10.1016/j.chroma.2006.03.102] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 03/21/2006] [Accepted: 03/22/2006] [Indexed: 11/25/2022]
Abstract
A method has been established for the determination of five carbamate pesticides in water samples using liquid-phase microextraction (LPME) followed by on-column derivatization and gas chromatography-mass spectrometric (GC-MS) determination. Trimethylphenylammonium hydroxide (TMPAH) and trimethylsulfonium hydroxide (TMSH) were used as derivatization reagent for extracts prior to GC-MS analysis as carbamate pesticides are thermally labile compounds. Parameters that affect the extraction efficiency (selection of organic solvent and extraction time) and derivatization efficiency (choice of derivatization reagent and concentration of derivatization reagent) were investigated. The proposed method provided good enrichment factors up to 224, with reproducibility ranging from 4.86 to 7.81%, and good linearity from 1 to 400 microg/L. The limits of detection (LODs) ranged between 0.2 and 0.8 microg/L (S/N = 3) using GC-MS with selective ion monitoring. This method was applied to the determination of carbamate pesticides in tap water and waste water.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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48
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Ma M, Kang S, Zhao Q, Chen B, Yao S. Liquid-phase microextraction combined with high-performance liquid chromatography for the determination of local anaesthetics in human urine. J Pharm Biomed Anal 2006; 40:128-35. [PMID: 16076540 DOI: 10.1016/j.jpba.2005.06.023] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2004] [Revised: 06/21/2005] [Accepted: 06/21/2005] [Indexed: 11/23/2022]
Abstract
A simple liquid-phase microextraction (LPME) device combined with high-performance liquid chromatography (HPLC) is presented for the simultaneous analysis of local anaesthetics, lidocaine, bupivacaine, and tetracaine, from human urine sample. An organic solvent showed good compatibility with the mobile phase of the HPLC, o-dibutyl phthalate, was selected. Local anaesthetics are extracted from 6 ml of the feed aqueous solution and human urine sample into a water-immiscible organic solvent suspended at the needle tip of the microsyringe, then the organic solvent was directly introduced to a reversed-phase HPLC system. The kind of the organic extraction solvent, the stirring rate, the pH value of the aqueous feed solution, and the extraction time have been discussed. Under the optimized extraction conditions, high enrichment factors (more than 86.0-fold) and significant sample clean-up for all of studied local anaesthetics were achieved within 30 min. The detection limits (lower than 0.05 microg/ml) were comparable with previously reported gas chromatography methods. This method was applied to specimen of patient who was treated with extradural anaesthesia of lidocaine, bupivacaine, and tetracaine, and revealed that simultaneous determination of above three local anaesthetics in human urine was possible.
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Affiliation(s)
- Ming Ma
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
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49
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Sarafraz Yazdi A, Es'haghi Z. Surfactant enhanced liquid-phase microextraction of basic drugs of abuse in hair combined with high performance liquid chromatography. J Chromatogr A 2005; 1094:1-8. [PMID: 16257282 DOI: 10.1016/j.chroma.2005.07.110] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2005] [Revised: 07/17/2005] [Accepted: 07/25/2005] [Indexed: 11/22/2022]
Abstract
The aim of this study was to evaluate the performance of a technique for simultaneous testing of hydrophilic abuse drugs in hair. The analysis of, codeine and methadone in morphine hair included incubation in methanol (5h, 50 degrees C), Surfactant enhanced liquid-phase microextraction (SE-LPME) and HPLC analysis. This study has demonstrated that SE-LPME constitute a real alternative to the other liquid-phase microextraction methods, for pre-concentration and extraction of hydrophilic drugs in biological samples and has shown the advantages of these optimized methodologies over the traditional microextraction techniques. For these drugs recoveries in the range of 57.5-93.7 were obtained from hair. The drugs were enriched by a factor of 61-128 during SE-LPME. Linearity (r2, 0.9982-0.9997) was obtained in the range of 50-500 microg/l for morphine and 10-500 microg/l for codeine and methadone.
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Affiliation(s)
- Ali Sarafraz Yazdi
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Azadi Sq., Mashhad, Khorasan 91775, Iran.
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50
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de Santana FJM, de Oliveira ARM, Bonato PS. Chiral liquid chromatographic determination of mirtazapine in human plasma using two-phase liquid-phase microextraction for sample preparation. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.06.030] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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