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Naing NN, Lee HK. Microextraction and analysis of contaminants adsorbed on atmospheric fine particulate matter: A review. J Chromatogr A 2020; 1627:461433. [DOI: 10.1016/j.chroma.2020.461433] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 11/26/2022]
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Luo D, Fang Z, Zhao X, Ma Y, Ye J, Chu Q. Salt-effect enhanced hollow-fiber liquid-phase microextraction of glutathione in human saliva followed by miniaturized capillary electrophoresis with amperometric detection. Electrophoresis 2020; 41:328-334. [PMID: 31884689 DOI: 10.1002/elps.201900390] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 12/19/2022]
Abstract
A hollow-fiber liquid-phase microextraction (HF-LPME) method was established for purification and enrichment of glutathione (GSH) in human saliva followed by a miniaturized capillary electrophoresis with amperometric detection system (mini-CE-AD). Based on regulating isoelectric point and increasing salt effect to modify donor phase, HF-LPME could provide high enrichment efficiency for GSH up to 471 times, and the extract was directly injected for mini-CE-AD analysis. The salt-effect enhanced HF-LPME/mini-CE-AD method has been successfully applied to saliva analysis, and acceptable LOD (0.46 ng/mL, S/N = 3) and recoveries (92.7-101.3%) could be obtained in saliva matrix. The sample pretreatment of this developed method was simple and required no derivatization, providing a potential alternative for non-invasive fluid analysis using portable instrument.
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Affiliation(s)
- Dan Luo
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
| | - Zhonghui Fang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
| | - Xiaoshuang Zhao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
| | - Yaolu Ma
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
| | - Jiannong Ye
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
| | - Qingcui Chu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, P. R. China
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Azeem HA, Tolcha T, Hyberg PE, Essén S, Stenström K, Swietlicki E, Sandahl M. Extending the scope of dispersive liquid-liquid microextraction for trace analysis of 3-methyl-1,2,3-butanetricarboxylic acid in atmospheric aerosols leading to the discovery of iron(III) complexes. Anal Bioanal Chem 2019; 411:2937-2944. [PMID: 30931501 PMCID: PMC6522453 DOI: 10.1007/s00216-019-01741-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 02/20/2019] [Accepted: 03/01/2019] [Indexed: 11/30/2022]
Abstract
3-Methyl-1,2,3-butanetricarboxylic acid (MBTCA) is a secondary organic aerosol and can be used as a unique emission marker of biogenic emissions of monoterpenes. Seasonal variations and differences in vegetation cover around the world may lead to low atmospheric MBTCA concentrations, in many cases too low to be measured. Hence, an important tool to quantify the contribution of terrestrial vegetation to the loading of secondary organic aerosol may be compromised. To meet this challenge, a dispersive liquid–liquid microextraction (DLLME) method, known for the extraction of hydrophobic compounds, was extended to the extraction of polar organic compounds like MBTCA without compromising the efficiency of the method. The extraction solvent was fine-tuned using tri-n-octyl phosphine oxide as additive. A multivariate experimental design was applied for deeper understanding of significant variables and interactions between them. The optimum extraction conditions included 1-octanol with 15% tri-n-octyl phosphine oxide (w/w) as extraction solvent, methanol as dispersive solvent, 25% NaCl dissolved in 5 mL sample (w/w) acidified to pH 2 using HNO3, and extraction time of 15 min. A limit of detection of 0.12 pg/m3 in air was achieved. Furthermore, unique complexation behavior of MBTCA with iron(III) was found when analyzed with ultra-high-performance liquid chromatography coupled with electrospray ionization–quadrupole time-of-flight mass spectrometry (UHPLC–ESI–QToF). A comprehensive overview of this complexation behavior of MBTCA was examined with systematically designed experiments. This newly discovered behavior of MBTCA will be of interest for further research on organometallic photooxidation chemistry of atmospheric aerosols. a) Additive assisted DLLME and MBTCA complexes with Fe(III), b) A good quality figure is attached in ppt format to facilitate editable objects ![]()
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Affiliation(s)
- Hafiz Abdul Azeem
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00, Lund, Sweden.
| | - Teshome Tolcha
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00, Lund, Sweden.,Department of Chemistry, Addis Ababa University, 1000, Addis Ababa, Ethiopia
| | - Petter Ekman Hyberg
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00, Lund, Sweden
| | - Sofia Essén
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00, Lund, Sweden
| | - Kristina Stenström
- Department of Physics, Division of Nuclear Physics, Lund University, Box 118, 221 00, Lund, Sweden
| | - Erik Swietlicki
- Department of Physics, Division of Nuclear Physics, Lund University, Box 118, 221 00, Lund, Sweden
| | - Margareta Sandahl
- Department of Chemistry, Center for Analysis and Synthesis, Lund University, P.O. Box 124, 221 00, Lund, Sweden
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Tributyl phosphate assisted hollow-fiber liquid-phase microextraction of short-chain fatty acids in microbial degradation fluid using capillary electrophoresis-contactless coupled conductivity detection. J Pharm Biomed Anal 2018; 154:191-197. [PMID: 29550708 DOI: 10.1016/j.jpba.2018.02.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/24/2018] [Accepted: 02/26/2018] [Indexed: 12/26/2022]
Abstract
A tributyl phosphate assisted hollow-fiber liquid-phase microextraction coupled with capillary electrophoresis-contactless coupled conductivity detection (HF-LPME/CE-C4D) method has been developed for trace analysis of common short-chain fatty acids (SCFAs) without derivatization. Under the optimum conditions, ten SCFAs including a pair of isomers were well separated from their homologous FAs and the main coexisting inorganic anions within 40 min. Tributyl phosphate assisted HF-LPME produced excellent purification and enrichment for the model sample with high-salt matrix, microbial degradation fluid, and the limits of detection could reach 0.072-0.67 ng/mL (S/N = 3). Owing to its high sensitivity, good linearity, and acceptable recovery, this proposed method provided a sensitive and environment-friendly alternative for trace analysis of SCFAs in complicated samples.
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Bahrami A, Ghamari F, Yamini Y, Ghorbani Shahna F, Moghimbeigi A. Hollow Fiber Supported Liquid Membrane Extraction Combined with HPLC-UV for Simultaneous Preconcentration and Determination of Urinary Hippuric Acid and Mandelic Acid. MEMBRANES 2017; 7:membranes7010008. [PMID: 28208685 PMCID: PMC5371969 DOI: 10.3390/membranes7010008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/03/2017] [Accepted: 02/10/2017] [Indexed: 11/16/2022]
Abstract
This work describes a new extraction method with hollow-fiber liquid-phase microextraction based on facilitated pH gradient transport for analyzing hippuric acid and mandelic acid in aqueous samples. The factors affecting the metabolites extraction were optimized as follows: the volume of sample solution was 10 mL with pH 2 containing 0.5 mol·L−1 sodium chloride, liquid membrane containing 1-octanol with 20% (w/v) tributyl phosphate as the carrier, the time of extraction was 150 min, and stirring rate was 500 rpm. The organic phase immobilized in the pores of a hollow fiber was back-extracted into 24 µL of a solution containing sodium carbonate with pH 11, which was placed inside the lumen of the fiber. Under optimized conditions, the high enrichment factors of 172 and 195 folds, detection limit of 0.007 and 0.009 µg·mL−1 were obtained. The relative standard deviation (RSD) (%) values for intra- and inter-day precisions were calculated at 2.5%–8.2% and 4.1%–10.7%, respectively. The proposed method was successfully applied to the analysis of these metabolites in real urine samples. The results indicated that hollow-fiber liquid-phase microextraction (HF-LPME) based on facilitated pH gradient transport can be used as a sensitive and effective method for the determination of mandelic acid and hippuric acid in urine specimens.
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Affiliation(s)
- Abdulrahman Bahrami
- Excellence Centre of Occupational Health, Research Center for Health Sciences, School of Public Health, Hamadan University of Medical Sciences, Hamadan 6517838736, Iran.
| | - Farhad Ghamari
- Department of Occupational Health, School of Public Health, Arak University of Medical Sciences, Arak 3819693345, Iran.
| | - Yadollah Yamini
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran 1411713116, Iran.
| | - Farshid Ghorbani Shahna
- Excellence Centre of Occupational Health, Research Center for Health Sciences, School of Public Health, Hamadan University of Medical Sciences, Hamadan 6517838736, Iran.
| | - Abbas Moghimbeigi
- Department of Biostatistics and Epidemiology, School of Public Health and Center of Health Research, Hamedan University of Medical Sciences, Hamedan 6517838736, Iran.
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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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van Pinxteren D, Teich M, Herrmann H. Hollow fibre liquid-phase microextraction of functionalised carboxylic acids from atmospheric particles combined with capillary electrophoresis/mass spectrometric analysis. J Chromatogr A 2012; 1267:178-88. [DOI: 10.1016/j.chroma.2012.06.097] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 06/11/2012] [Accepted: 06/24/2012] [Indexed: 11/24/2022]
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Preparation of magnetic poly(diethyl vinylphosphonate-co-ethylene glycol dimethacrylate) for the determination of chlorophenols in water samples. J Chromatogr A 2012; 1265:24-30. [DOI: 10.1016/j.chroma.2012.09.083] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 09/11/2012] [Accepted: 09/21/2012] [Indexed: 11/21/2022]
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Hyder M, Jönsson JÅ. Hollow-fiber liquid phase microextraction for lignin pyrolysis acids in aerosol samples and gas chromatography–mass spectrometry analysis. J Chromatogr A 2012; 1249:48-53. [DOI: 10.1016/j.chroma.2012.06.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 06/11/2012] [Accepted: 06/14/2012] [Indexed: 11/26/2022]
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