1
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Tůma P. Progress in on-line, at-line, and in-line coupling of sample treatment with capillary and microchip electrophoresis over the past 10 years: A review. Anal Chim Acta 2023; 1261:341249. [PMID: 37147053 DOI: 10.1016/j.aca.2023.341249] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/07/2023]
Abstract
The review presents an evaluation of the development of on-line, at-line and in-line sample treatment coupled with capillary and microchip electrophoresis over the last 10 years. In the first part, it describes different types of flow-gating interfaces (FGI) such as cross-FGI, coaxial-FGI, sheet-flow-FGI, and air-assisted-FGI and their fabrication using molding into polydimethylsiloxane and commercially available fittings. The second part deals with the coupling of capillary and microchip electrophoresis with microdialysis, solid-phase, liquid-phase, and membrane based extraction techniques. It mainly focuses on modern techniques such as extraction across supported liquid membrane, electroextraction, single drop microextraction, head space microextraction, and microdialysis with high spatial and temporal resolution. Finally, the design of sequential electrophoretic analysers and fabrication of SPE microcartridges with monolithic and molecularly imprinted polymeric sorbents are discussed. Applications include the monitoring of metabolites, neurotransmitters, peptides and proteins in body fluids and tissues to study processes in living organisms, as well as the monitoring of nutrients, minerals and waste compounds in food, natural and wastewater.
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Affiliation(s)
- Petr Tůma
- Department of Hygiene, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Prague 10, Czech Republic.
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2
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Novel developments in capillary electrophoresis miniaturization, sampling, detection and portability: An overview of the last decade. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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3
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Jeong S, Noulorsaytour X, Valdez JE, Chung DS. Single bubble in-tube microextraction coupled with capillary electrophoresis. Electrophoresis 2021; 43:456-463. [PMID: 34661921 DOI: 10.1002/elps.202100216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 11/10/2022]
Abstract
Headspace (HS) extraction is a sample pretreatment technique for volatile and semivolatile organic compounds in a complex matrix. Recently, in-tube microextraction (ITME) coupled with CE using an acceptor plug placed in the capillary inlet was developed as a simple but powerful HS extraction method. Here, we present single bubble (SB) ITME using a bubble hanging to the capillary inlet immersed in a sample donor solution as a HS of submicroliter volume (∼200 nL). The analytes evaporated to the bubble were extracted into the acceptor phase through the capillary opening, then electrophoresis of the enriched extract was carried out. Since the bubble volume was much smaller than a conventional HS volume (∼1 mL), it was filled with the evaporated analytes rapidly and the analytes could be enriched much faster compared to conventional HS-ITME. Owing to the high surface-to-volume ratio of the SB, 5 min SB-ITME yielded the enrichment factor values similar to those of 10 min HS-ITME. When 5 min SB-ITME at room temperature was applied to a tap water sample, the enrichment factors of 2,4,6-trichlorophenol (TCP), 2,3,6-TCP, and 2,6-dichlorophenol were 53, 41, and 60, respectively, and the LOQs obtained by monitoring the absorbance at 214 nm were 5.6-8.3 ppb, much lower than 200 ppb, the World Health Organization guideline for the maximum permissible concentration of 2,4,6-TCP in drinking water.
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Affiliation(s)
- Sunkyung Jeong
- Department of Chemistry, Seoul National University, Seoul, Korea
| | | | - Joseph E Valdez
- Department of Chemistry, Seoul National University, Seoul, Korea.,Department of Natural Sciences, College of Arts and Sciences, Nueva Vizcaya State University, Bayombong, Philippines
| | - Doo Soo Chung
- Department of Chemistry, Seoul National University, Seoul, Korea
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4
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Zhang J, Yu C, Chen Z, Luo X, Zhao H, Wu F. Zeolitic imidazolate framework-8/ fluorinated graphene coated SiO 2 composites for pipette tip solid-phase extraction of chlorophenols in environmental and food samples. Talanta 2021; 228:122229. [PMID: 33773733 DOI: 10.1016/j.talanta.2021.122229] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/08/2021] [Accepted: 02/13/2021] [Indexed: 01/12/2023]
Abstract
In this work, a novel composite adsorbent was successfully prepared by zeolite imidazolate framework-8/fluorinated graphene layer-by-layer covalently bonded on SiO2 microspheres, and followed to be packed into micro pipette tip for extraction of trace chlorophenols prior to their detection by high performance liquid chromatography (HPLC). The morphology and structure of adsorbent material was characterized by field emission scanning electron microscopy with energy dispersive spectrometer, X-ray diffraction, and N2 adsorption. The parameters including the amount of adsorbent, sampling volume, sampling rate, sample pH, and desorption solvent affected the extraction performance was systematically investigated by pipette tip solid-phase extraction (PT-SPE) coupled with HPLC analysis. Under the optimized condition, the linearity of this method ranged from 20 to 2000 ng mL-1 for chlorophenols (CPs) with determination coefficient higher than 0.99. The limit of detection (at a signal-to-noise ratio of 3) were in the range 2-20 ng mL-1 for tap water and black tea drinks, 0.2-2 μg g-1 for honey. The relative recoveries of the CPs from spiked samples ranged from 71.8% to 104.7%, with relative standard deviations less than 6.2%. The filled extraction tube exhibited good stability and reproducibility. The proposed method has been successfully used to detect CPs in water and drinks with satisfactory recoveries.
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Affiliation(s)
- Juan Zhang
- Schoolof Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Chen Yu
- Schoolof Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Zhipeng Chen
- Schoolof Chemistry and Environmental Engineering, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Xiaogang Luo
- School of Chemical Engineering and Pharmacy, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Haiyan Zhao
- School of Pharmaceutical Sciences, South-central University for Nationalities, Wuhan, 430074, China
| | - Fengshou Wu
- School of Chemical Engineering and Pharmacy, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China.
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5
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Kartsova LA, Makeeva DV, Bessonova EA. Current Status of Capillary Electrophoresis. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820120084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Miková B, Dvořák M, Ryšavá L, Kubáň P. Hollow Fiber Liquid-Phase Microextraction At-Line Coupled to Capillary Electrophoresis for Direct Analysis of Human Body Fluids. Anal Chem 2020; 92:7171-7178. [DOI: 10.1021/acs.analchem.0c00697] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Blanka Miková
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, CZ-60200 Brno, Czech Republic
- Department of Analytical Chemistry, Masaryk University, Kotlářská 2, CZ-60200 Brno, Czech Republic
| | - Miloš Dvořák
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, CZ-60200 Brno, Czech Republic
| | - Lenka Ryšavá
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, CZ-60200 Brno, Czech Republic
- Institute of Food Science and Biotechnology, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, CZ-61200 Brno, Czech Republic
| | - Pavel Kubáň
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 97, CZ-60200 Brno, Czech Republic
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7
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Practical sample pretreatment techniques coupled with capillary electrophoresis for real samples in complex matrices. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115702] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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8
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Yue ME, Lin Q, Xu J, Jiang TF. Headspace in-tube microextraction combined with reverse-flow micellar electrokinetic capillary chromatography for detection of pyrethroid herbicides in fruits. ACTA CHROMATOGR 2019. [DOI: 10.1556/1326.2018.00436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Mei-E Yue
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Qiaoyan Lin
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Jie Xu
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Ting-Fu Jiang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P.R. China
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9
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Jeong S, Shakerian F, Chung DS. Analyte focusing by micelle collapse for liquid extraction surface analysis coupled with capillary electrophoresis of neutral analytes on a solid surface. Electrophoresis 2019; 40:2463-2468. [PMID: 31111964 DOI: 10.1002/elps.201900113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/06/2019] [Accepted: 05/09/2019] [Indexed: 11/06/2022]
Abstract
Liquid extraction surface analysis (LESA) has an advantage of directly sampling analytes on a surface, thus avoiding unnecessary dilution by homogenization of the bulk sample commonly practiced in solid sample analysis. By combining LESA with CE, the additional advantage of separating analytes before detection can be accomplished. For neutral molecules, MEKC needs to be used. Since the detection sensitivity of CE in general suffers from the small capillary dimension, analyte focusing by micelle collapse was employed for enhanced extraction in LESA and sample preconcentration for MEKC. In addition, using a commercial CE instrument, the LESA process was performed much faster and more reliably compared to our first demonstration of LESA-CE using a homemade CE setup. Three neutral water-insoluble pesticides sprayed on an apple skin were directly extracted, preconcentrated, and analyzed by the automated LESA-analyte focusing by micelle collapse-MEKC with high sensitivity in 10 min. The relative standard deviations of the migration times and peak heights were 0.8-2.1 and 1.2-3.0%, respectively when ametryn was used as an internal standard. The limits of detection obtained with UV absorbance at 200 nm were 1.8-6.4 ppb.
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Affiliation(s)
- Sunkyung Jeong
- Department of Chemistry, Seoul National University, Seoul, South Korea
| | - Farid Shakerian
- Department of Chemistry, Seoul National University, Seoul, South Korea
| | - Doo Soo Chung
- Department of Chemistry, Seoul National University, Seoul, South Korea
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10
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Determination of N-acylhomoserine lactones from spoilage bacteria and aquatic product by integrative coupling method of solvent-terminated dispersive liquid-liquid microextraction and micellar electrokinetic capillary chromatography. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Havlikova M, Cabala R, Pacakova V, Bursova M, Bosakova Z. Critical evaluation of microextraction pretreatment techniques - Part 1: Single drop and sorbent-based techniques. J Sep Sci 2018; 42:273-284. [DOI: 10.1002/jssc.201800902] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/02/2018] [Accepted: 10/02/2018] [Indexed: 12/16/2022]
Affiliation(s)
- Martina Havlikova
- Faculty of Science; Department of Analytical Chemistry; Charles University; Prague 2 Czech Republic
| | - Radomir Cabala
- Faculty of Science; Department of Analytical Chemistry; Charles University; Prague 2 Czech Republic
- Toxicology Department; Institute of Forensic Medicine and Toxicology; General University Hospital in Prague and 1st Faculty of Medicine of Charles University; Prague 2 Czech Republic
| | - Vera Pacakova
- Faculty of Science; Department of Analytical Chemistry; Charles University; Prague 2 Czech Republic
| | - Miroslava Bursova
- Faculty of Science; Department of Analytical Chemistry; Charles University; Prague 2 Czech Republic
- Toxicology Department; Institute of Forensic Medicine and Toxicology; General University Hospital in Prague and 1st Faculty of Medicine of Charles University; Prague 2 Czech Republic
| | - Zuzana Bosakova
- Faculty of Science; Department of Analytical Chemistry; Charles University; Prague 2 Czech Republic
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12
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Yue ME, Lin Q, Xu J, Jiang TF. Ionic liquid-based headspace in-tube liquid-phase microextraction coupled with capillary electrophoresis for sensitive detection of phenols. Electrophoresis 2018; 39:1771-1776. [PMID: 29683521 DOI: 10.1002/elps.201800068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/07/2018] [Accepted: 04/15/2018] [Indexed: 12/20/2022]
Abstract
An ionic liquid-based headspace in-tube liquid-phase microextraction (IL-HS-ITLPME) in-line coupled with capillary electrophoresis (CE) is proposed. The method is capable of quantifying trace amounts of phenols in environmental water samples. In the newly developed method, simply by placing a capillary injected with IL in the HS above the aqueous sample, volatile phenols were extracted into the IL acceptor phase in the capillary. After extraction, electrophoresis of the phenols in the capillary was carried out. Extraction parameters such as the extraction time, extraction temperature, ionic strength, volume of the sample solution and IL types were systematically investigated. Under the optimized conditions, enrichment factors for four phenols were from 1510 to 1985. The proposed method provided a good linearity, low limits of detection (below 5.0 ng mL-1 ), and good repeatability of the extractions (RSDs below 6.7%, n = 6). This method was then utilized to analyze two real environmental samples of Xiaoxi Lake and tap water, obtaining acceptable recoveries and precisions. Compared with the usual HS-ITLPME for CE, IL-HS-ITLPME-CE is a simple, low-cost, fast and environmentally friendly pre-concentration technique. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Mei-E Yue
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Qiaoyan Lin
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Jie Xu
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Ting-Fu Jiang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao, P. R. China
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13
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Lee HG, Kwon JY, Chung DS. Sensitive arsenic speciation by capillary electrophoresis using UV absorbance detection with on-line sample preconcentration techniques. Talanta 2018; 181:366-372. [PMID: 29426526 DOI: 10.1016/j.talanta.2018.01.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/10/2018] [Accepted: 01/12/2018] [Indexed: 11/18/2022]
Abstract
The World Health Organization (WHO) guideline states that the total arsenic concentration in drinking water must not exceed 10 ppb. However, arsenic toxicity varies significantly, with inorganic arsenic species being more toxic than organic species. Arsenic speciation is therefore important for evaluating the health risks from arsenic-contaminated drinking water. Capillary electrophoresis provides the necessary high performance separation to determine arsenic species in water, but its sensitivity with absorbance detection is far below than needed. Using a coated capillary, several on-line sample preconcentration techniques such as large volume sample stacking with an electroosmotic flow pump, field amplified sample injection (FASI), transient isotachophoresis (tITP), electrokinetic supercharging (EKS) combining FASI and tITP, and counter flow (CF)-EKS, were therefore investigated. With CF-EKS using phosphate and N-cyclohexyl-2-aminoethanesulfonate as leading and terminating electrolytes, respectively, standard samples of arsenite, arsenate, monomethylarsonic acid, and dimethylarsinic acid were preconcentrated from 6,300- to 45,000-fold. The limits of detection obtained with UV absorbance detection were 0.08-0.3 ppb As. For a spring water sample spiked with the four arsenic species, LODs of 2-9 ppb As were obtained, which are lower than the WHO guideline of 10 ppb total As.
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Affiliation(s)
- Ho Gyun Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Joon Yub Kwon
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Doo Soo Chung
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.
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14
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Breadmore MC, Wuethrich A, Li F, Phung SC, Kalsoom U, Cabot JM, Tehranirokh M, Shallan AI, Abdul Keyon AS, See HH, Dawod M, Quirino JP. Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2014–2016). Electrophoresis 2016; 38:33-59. [DOI: 10.1002/elps.201600331] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 08/09/2016] [Accepted: 08/10/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Michael C. Breadmore
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
- ARC Centre of Excellence for Electromaterials Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
- ASTech, ARC Training Centre for Portable Analytical Separation Technologies, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Alain Wuethrich
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Feng Li
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Sui Ching Phung
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Umme Kalsoom
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Joan M. Cabot
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
- ARC Centre of Excellence for Electromaterials Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Masoomeh Tehranirokh
- ASTech, ARC Training Centre for Portable Analytical Separation Technologies, School of Physical Science University of Tasmania Hobart Tasmania Australia
| | - Aliaa I. Shallan
- Department of Analytical Chemistry, Faculty of Pharmacy Helwan University Cairo Egypt
| | - Aemi S. Abdul Keyon
- Department of Chemistry, Faculty of Science Universiti Teknologi Malaysia Johor Bahru Johor Malaysia
| | - Hong Heng See
- Department of Chemistry, Faculty of Science Universiti Teknologi Malaysia Johor Bahru Johor Malaysia
- Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and industrial Research Universiti Teknologi Malaysia Johor Bahru Johor Malaysia
| | - Mohamed Dawod
- Department of Chemistry University of Michigan Ann Arbor MI USA
| | - Joselito P. Quirino
- Australian Centre of Research on Separation Science, School of Physical Science University of Tasmania Hobart Tasmania Australia
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15
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Study of the mechanism of acetonitrile stacking and its application for directly combining liquid-phase microextraction with micellar electrokinetic chromatography. J Chromatogr A 2016; 1461:161-70. [DOI: 10.1016/j.chroma.2016.06.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 06/17/2016] [Accepted: 06/20/2016] [Indexed: 11/24/2022]
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16
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Headspace in-tube microextraction coupled with micellar electrokinetic chromatography of neutral aromatic compounds. Talanta 2016; 148:729-33. [DOI: 10.1016/j.talanta.2015.11.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/07/2015] [Accepted: 11/14/2015] [Indexed: 11/18/2022]
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17
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Hu L, Shan W, Zhang Y, Li S, Gao H, Lu R, Zhang S, Zhou W. Liquid phase microextraction based on the solidification of a floating ionic liquid combined with high-performance liquid chromatography for the preconcentration of phthalate esters in environmental waters and in bottled beverages. RSC Adv 2016. [DOI: 10.1039/c6ra00788k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Liquid-phase microextraction based on the solidification of floating ionic liquids.
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Affiliation(s)
- Lu Hu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Wanyu Shan
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Ying Zhang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Songqing Li
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Haixiang Gao
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Runhua Lu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Sanbing Zhang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
| | - Wenfeng Zhou
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100194
- China
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18
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Headspace In-Tube Microextraction Coupled with Capillary Electrophoresis for Detection of Bromophenols in Water and Trachypenaeus curvirostris. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0351-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Kokosa JM. Recent trends in using single-drop microextraction and related techniques in green analytical methods. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.04.019] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Tang Q, Shi X, Hou X, Zhou J, Xu Z. Development of molecularly imprinted electrochemical sensors based on Fe3O4@MWNT-COOH/CS nanocomposite layers for detecting traces of acephate and trichlorfon. Analyst 2015; 139:6406-13. [PMID: 25325612 DOI: 10.1039/c4an01514b] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we developed a novel biomimetic electrochemical sensor sensitized with a Fe3O4@carboxyl-functionalized multiwalled carbon nanotube/chitosan nanocomposite layer using a molecularly imprinted film as a recognition element for the rapid detection of acephate and trichlorfon. The performance of the imprinted sensor was investigated using cyclic voltammetry and differential pulse voltammetry, and the results indicated that the sensor exhibited fast responses to both acephate and trichlorfon. The imprinted sensor had good linear current responses to acephate and trichlorfon concentrations in the ranges from 1.0 × 10(-4) to 1.0 × 10(-10) M and 1.0 × 10(-5) to 1.0 × 10(-11) M, respectively. Under optimal conditions, the imprinted sensor had low limits of detection (signal to noise ratio, S/N = 3) of 6.81 × 10(-11) M for acephate and 8.94 × 10(-12) M for trichlorfon. The developed method was successfully applied to detect acephate and trichlorfon spiked in fortified kidney bean and cucumber samples with good recoveries ranging from 85.7% to 94.9% and relative standard deviations of 3.46-5.18%.
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Affiliation(s)
- Qinghua Tang
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
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21
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Shu-jiang L, Zhan-ying C, Yin-zhong C, Shi-lian W, Qi L, Yuan-qing F, Huai-mao J, Xin-jun Z, Yun-gang Z. The breakthrough curve combination for xenon sampling dynamics in a carbon molecular sieve column. Analyst 2015; 140:428-33. [DOI: 10.1039/c4an01766h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the research of xenon sampling and xenon measurements, the xenon breakthrough curve plays a significant role in the xenon concentrating dynamics.
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Affiliation(s)
- Liu Shu-jiang
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Chen Zhan-ying
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Chang Yin-zhong
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Wang Shi-lian
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Li Qi
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Fan Yuan-qing
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Jia Huai-mao
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Zhang Xin-jun
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
| | - Zhao Yun-gang
- CTBT Beijing National Data Centre and Radionuclide Laboratory
- Beijing 100085
- China
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Liquid extraction surface analysis in-line coupled with capillary electrophoresis for direct analysis of a solid surface sample. Anal Chim Acta 2014; 838:45-50. [DOI: 10.1016/j.aca.2014.05.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 05/06/2014] [Accepted: 05/09/2014] [Indexed: 11/19/2022]
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