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Ablat H, Nurmamat X, Ma X, Xie Q, Zhao Z. Application of infrared spectroscopy and its theoretical simulation to arsenic adsorption processes. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10867. [PMID: 37041692 DOI: 10.1002/wer.10867] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/22/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
Accurate detection and analysis of arsenic pollutants are an important means to enhance the ability to manage arsenic pollution. Infrared (IR) spectroscopy technology has the advantages of fast analysis speed, high resolution, and high sensitivity and can be monitored by real-time in situ analysis. This paper reviews the application of IR spectroscopy in the qualitative and quantitative analysis of inorganic and organic arsenic acid adsorbed by major minerals such as ferrihydrite (FH), hematite, goethite, and titanium dioxide. The IR spectroscopy technique cannot only identify different arsenic contaminants but also obtain the content and adsorption rate of arsenic contaminants in the solid phase. The reaction equilibrium constants and the degree of reaction conversion can be determined by constructing adsorption isotherms or combining them with modeling techniques. Theoretical calculations of IR spectra of mineral adsorbed arsenic pollutant systems based on density functional theory (DFT) and analysis and comparison of the measured and theoretically calculated characteristic peaks of IR spectra can reveal the microscopic mechanism and surface chemical morphology of the arsenic adsorption process. This paper systematically summarizes the qualitative and quantitative studies and theoretical calculations of IR spectroscopy in inorganic and organic arsenic pollutant adsorption systems, which provides new insights for accurate detection and analysis of arsenic pollutants and arsenic pollution control. PRACTITIONER POINTS: This paper reviews the application of infrared spectroscopy in the qualitative and quantitative analyses of inorganic and organic arsenic acid adsorbed by major minerals such as ferrihydrite, hematite, goethite, and titanium dioxide, which can help identify and evaluate the type and concentration of arsenic pollutants in water bodies. In this paper, theoretical calculations of infrared spectra of mineral adsorbed arsenic pollutant systems based on density functional theory reveal the adsorption mechanism of arsenic pollutants in water at the solid-liquid interface and help to develop targeted arsenic pollution control technologies. This paper provides a new and reliable analytical detection technique for the study of arsenic contaminants in water bodies.
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Affiliation(s)
- Hadiya Ablat
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, China
- Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Urumqi, China
| | - Xamsiya Nurmamat
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, China
- Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Urumqi, China
| | - Xiaoyan Ma
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, China
- Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Urumqi, China
| | - Qingqing Xie
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, China
- Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Urumqi, China
| | - Zhixi Zhao
- College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, China
- Xinjiang Key Laboratory of Energy Storage and Photoelectroctalytic Materials, Urumqi, China
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Kretzschmar J, Brendler E, Wagler J. Phenylarsonic acid-DMPS redox reaction and conjugation investigated by NMR spectroscopy and X-ray diffraction. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 92:103837. [PMID: 35248761 DOI: 10.1016/j.etap.2022.103837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
The reaction between 2,3-dimercaptopropane-1-sulfonate (DMPS, unithiol) and four phenylarsonic(V) acids, i.e. phenylarsonic acid (PAA), 4-hydroxy-3-nitrophenylarsonic acid (HNPAA), 2-aminophenylarsonic acid (o-APAA) and 4-aminophenylarsonic acid (p-APAA), is investigated in aqueous solution. The pentavalent arsenic compounds are reduced by DMPS to their trivalent analogs and instantly chelated by the vicinal dithiol, forming covalent As-S bonds within a five-membered chelate ring. The different types and positions of polar substituents at the aromatic ring of the arsonic acids influence the reaction rates in the same way as observed for reaction with glutathione (GSH), as well as the syn/anti molar ratio of the diastereomeric products, which was analyzed using time- and temperature-dependent nuclear magnetic resonance (NMR) spectroscopy. Addition of DMPS to the conjugate formed by a phenylarsonic(V) acid and the biologically relevant tripeptide GSH showed the immediate replacement of GSH by chelating DMPS, underlining the importance of dithiols as detoxifying agent.
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Affiliation(s)
- Jerome Kretzschmar
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany.
| | - Jörg Wagler
- Institute of Inorganic Chemistry, TU Bergakademie Freiberg, 09599 Freiberg, Germany
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Wang Y, Ma D, Zhang G, Wang X, Zhou J, Chen Y, You X, Liang C, Qi Y, Li Y, Wang A. An Electrochemical Immunosensor Based on SPA and rGO-PEI-Ag-Nf for the Detection of Arsanilic Acid. Molecules 2021; 27:molecules27010172. [PMID: 35011402 PMCID: PMC8746453 DOI: 10.3390/molecules27010172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/19/2021] [Accepted: 12/21/2021] [Indexed: 12/02/2022] Open
Abstract
A sensitive electrochemical immunosensor was prepared for rapid detection of ASA based on arsanilic acid (ASA) monoclonal antibody with high affinity. In the preparation of nanomaterials, polyethyleneimine (PEI) improved the stability of the solution and acted as a reducing agent to generate reduced graphene oxide (rGO) with relatively strong conductivity, thereby promoting the transfer of electrons. The dual conductivity of rGO and silver nanoparticles (AgNPs) improved the sensitivity of the sensor. The synthesis of nanomaterials were confirmed by UV-Vis spectroscopy, X-ray diffraction, transmission electron microscopy and scanning electron microscopy. In the optimal experiment conditions, the sensor could achieve the detection range of 0.50–500 ng mL−1 and the limit of detection (LOD) of 0.38 ng mL−1 (S/N = 3). Moreover, the sensor exhibited excellent specificity and acceptable stability, suggesting that the proposed sensor possessed a good potential in ASA detection. Thus, the as-prepared biosensor may be a potential way for detecting other antibiotics in meat and animal-derived foods.
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Affiliation(s)
- Yanwei Wang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Dongdong Ma
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Gaiping Zhang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Xuannian Wang
- School of Life Science and Basic Medicine, Xinxiang University, Xinxiang 453003, China;
| | - Jingming Zhou
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yumei Chen
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Xiaojuan You
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Chao Liang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yanhua Qi
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yuya Li
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Aiping Wang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
- Correspondence:
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Liu Q, Lu X, Peng H, Popowich A, Tao J, Uppal JS, Yan X, Boe D, Le XC. Speciation of arsenic – A review of phenylarsenicals and related arsenic metabolites. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.10.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Development and validation of an indirect competitive enzyme-linked immunosorbent assay for monitoring organoarsenic compounds in edible chicken and pork and feed. Food Chem 2016; 197:821-8. [DOI: 10.1016/j.foodchem.2015.11.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 11/03/2015] [Accepted: 11/12/2015] [Indexed: 11/18/2022]
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P Mangalgiri K, Adak A, Blaney L. Organoarsenicals in poultry litter: detection, fate, and toxicity. ENVIRONMENT INTERNATIONAL 2015; 75:68-80. [PMID: 25461415 DOI: 10.1016/j.envint.2014.10.022] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/24/2014] [Accepted: 10/28/2014] [Indexed: 06/04/2023]
Abstract
Arsenic contamination in groundwater has endangered the health and safety of millions of people around the world. One less studied mechanism for arsenic introduction into the environment is the use of organoarsenicals in animal feed. Four organoarsenicals are commonly employed as feed additives: arsanilic acid, carbarsone, nitarsone, and roxarsone. Organoarsenicals are composed of a phenylarsonic acid molecule with substituted functional groups. This review documents the use of organoarsenicals in the poultry industry, reports analytical methods available for quantifying organic arsenic, discusses the fate and transport of organoarsenicals in environmental systems, and identifies toxicological concerns associated with these chemicals. In reviewing the literature on organoarsenicals, several research needs were highlighted: advanced analytical instrumentation that allows for identification and quantification of organoarsenical degradation products; a greater research emphasis on arsanilic acid, carbarsone, and nitarsone; identification of degradation pathways, products, and kinetics; and testing/development of agricultural wastewater and solid treatment technologies for organoarsenical-laden waste.
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Affiliation(s)
- Kiranmayi P Mangalgiri
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | - Asok Adak
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA; Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Lee Blaney
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
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Kretzschmar J, Brendler E, Wagler J, Schmidt AC. Kinetics and activation parameters of the reaction of organoarsenic(V) compounds with glutathione. JOURNAL OF HAZARDOUS MATERIALS 2014; 280:734-740. [PMID: 25238190 DOI: 10.1016/j.jhazmat.2014.08.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/12/2014] [Accepted: 08/12/2014] [Indexed: 06/03/2023]
Abstract
In this work the kinetics of the reaction of glutathione (GSH) with the organoarsenic(V) compounds phenylarsonic acid (PAA), 4-hydroxy-3-nitrophenylarsonic acid (HNPAA), p-aminophenylarsonic acid (p-APAA) and o-aminophenylarsonic acid (o-APAA) as well as monomethylarsonic acid (MMAA) and dimethylarsinic acid (DMAA) is investigated. The reaction progress is monitored in real time by (1)H NMR, allowing the determination of rate coefficients and half-lives as well as activation parameters. The reaction consists of two steps: redox reaction and conjugation. In all investigated systems the conjugation is fast compared to the redox reaction and, therefore, rate determining. All investigated phenylarsonic acids follow the same rate law, showing overall reaction orders of 3 and half-lives between 47.7 ± 0.2 and 71.0 ± 3.6 min. The methylated compounds react slower, showing half-lives of 76.6 ± 0.4 and 444 ± 10 min for DMAA and MMAA, respectively. Enthalpies of activation range from 20 to 36 (± 2) kJ mol(-1) and the entropies of activation are within -154 and -97(± 7)J mol(-1)K(-1). The results reveal a correlation of the toxicity of the arsenic compound and the reaction rate with GSH. This may pave the way for the estimation of the toxicity of such compounds by simple kinetic studies.
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Affiliation(s)
- Jerome Kretzschmar
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
| | - Erica Brendler
- Institute of Analytical Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
| | - Jörg Wagler
- Institute of Inorganic Chemistry, TU Bergakademie Freiberg, 09596 Freiberg, Germany.
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Monasterio RP, Londonio JA, Farias SS, Smichowski P, Wuilloud RG. Organic solvent-free reversed-phase ion-pairing liquid chromatography coupled to atomic fluorescence spectrometry for organoarsenic species determination in several matrices. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:3566-3574. [PMID: 21388170 DOI: 10.1021/jf104654y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A novel method has been developed to determine As-containing animal feed additives including roxarsone (ROX), p-arsanilic acid (p-ASA) and nitarsone (NIT), as well as other organic As species (dimethylarsonic acid (DMAA) and monomethylarsonic acid (MMAA)) by ion-pairing high-performance liquid chromatography coupled to hydride generation atomic fluorescence spectrometry (IP-HPLC-HG-AFS). A simple isocratic reversed-phase (RP) HPLC method with a mobile phase containing citric acid and sodium hexanesulfonate (pH 2.0) was developed using a C(18) column. The use of an organic solvent free mobile phase turns this methodology into an environmentally friendly alternative. Several ion pair forming agents, such as sodium hexanesulfonate, tetrabutylammonium bisulfate and perfluoroheptanoic acid, were studied. The limits of detection for As species were calculated in standard solution and resulted to be 0.2, 0.5, 0.6, 1.6, and 1.6 μg As L(-1) for MMAA, DMAA, p-ASA, ROX and NIT, respectively. This method exhibited convenient operation, high sensitivity and good repeatability. It was applied to As speciation in different samples including arugula, dog food, dog urine and chicken liver.
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Affiliation(s)
- Romina P Monasterio
- Analytical Chemistry Research and Development Group (QUIANID), LISAMEN-CCT-CONICET-Mendoza, Mendoza, Argentina
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Wang J, Nie L, Zhang L, Zhang C. DETERMINATION OF ARSANILIC ACID IN LIVESTOCK FEEDS BY HPLC USING AN ANION EXCHANGE COLUMN AND ULTRAVIOLET DETECTION. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.551605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jinrong Wang
- a State Key Laboratory on Animal Nutrition , China Agricultural University , Beijing, P. R. China
- b College of Bio-engineering , Henan University of Technology , Zhengzhou, P. R. China
| | - Linghong Nie
- c Department of Food Science and Engineering , Huaiyin Institute of Technology , Huai'an, P. R. China
| | - Liying Zhang
- a State Key Laboratory on Animal Nutrition , China Agricultural University , Beijing, P. R. China
| | - Caiyun Zhang
- b College of Bio-engineering , Henan University of Technology , Zhengzhou, P. R. China
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Wang P, Zhao G, Tian J, Su X. High-performance liquid chromatography-inductively coupled plasma mass spectrometry based method for the determination of organic arsenic feed additives and speciation of anionic arsenics in animal feed. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:5263-5270. [PMID: 20373739 DOI: 10.1021/jf1001205] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A novel method has been developed to detect two organic arsenic animal feed additives including roxarsone and p-arsanilic acid, as well as other arsenic species such as arsenite, dimethylarsinic acid, monomethylarsonic acid, arsenate, and 4-hydroxyphenylarsonic acid, by using high-performance liquid chromatography coupled to an inductively coupled plasma mass spectrometer (HPLC-ICP-MS). The influence of the type and concentrations of ion-pairing reagents on the separation efficiency of the different arsenic compounds was examined. The effects of the mobile phase pH on the retention of arsenic species on the chromatography column were studied. When a gradient elution procedure was used, the best separation of the seven arsenic species could be achieved in <20 min with a mobile phase consisting of 8% methanol and 92% aqueous tetrabutylammonium hydroxide (4 mM, pH 6.25) followed by 92% trifluoroacetic acid aqueous solution (0.1%, pH 2.0). Liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) was used as an assistant tool to screen arsenobetain (AsB) in the feed samples by monitoring the reaction at m/z 179-->120. The extractions of arsenic compounds from formula feed samples were studied, and results showed that the extraction with methanol/water (1:1) mixture yielded the most efficient percent compound recovery and the fastest extraction time for all arsenic species. Under optimum conditions, the limits of detection were <1.7 microg of As kg(-1), and the recoveries of all seven arsenic species were >78.5% with the relative standard deviation of <10%. The ion-pair reversed phase HPLC-ICP-MS method was then successfully applied to the speciation of arsenic in feedstuff and formula feed samples.
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Affiliation(s)
- Peilong Wang
- Institute of Quality Standards and Testing Techniques for Agriculture Products, China Agricultural Academy of Science, Beijing, China
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Determination of arsanilic acid and sulfanilic acid as adulterant in feed additives by reversed-phase high performance liquid chromatography. Se Pu 2010; 28:218-20. [DOI: 10.3724/sp.j.1123.2012.00218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Wang J, Nie L, Fu Z, Wang J. DETERMINATION OF ARSANILIC ACID IN LIVESTOCK FEEDS BY HPLC USING AN ANION EXCHANGE COLUMN AND ULTRAVIOLET DETECTION. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826070903526329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jinrong Wang
- a College of Bio-engineering, Henan University of Technology , Zhengzhou, P. R. China
| | - Linghong Nie
- b Department of Food Science and Engineering , Huaiyin Institute of Technology , Huai'an, P. R. China
| | - Zuolong Fu
- a College of Bio-engineering, Henan University of Technology , Zhengzhou, P. R. China
| | - Jinjin Wang
- a College of Bio-engineering, Henan University of Technology , Zhengzhou, P. R. China
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A review on sequential injection methods for water analysis. Anal Chim Acta 2009; 648:7-22. [DOI: 10.1016/j.aca.2009.06.030] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 06/05/2009] [Accepted: 06/05/2009] [Indexed: 11/21/2022]
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Sugiya K, Harada M, Okada T. Water-ice chip with liquid-core waveguide functionality. Toward lab on ice. LAB ON A CHIP 2009; 9:1037-1039. [PMID: 19350082 DOI: 10.1039/b821382h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A liquid-core waveguide is fabricated with water-ice, which has lower refractive index than most of the solvents, as cladding, and provides a possibility as an ice chip for flow analyses.
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Affiliation(s)
- Kohei Sugiya
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
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Liu J, Yu H, Song H, Qiu J, Sun F, Li P, Yang S. Simultaneous determination of p-arsanilic acid and roxarsone in feed by liquid chromatography-hydride generation online coupled with atomic fluorescence spectrometry. ACTA ACUST UNITED AC 2008; 10:975-8. [PMID: 18688468 DOI: 10.1039/b803210f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, simple and sensitive liquid chromatography-hydride generation online coupled with atomic fluorescence spectrometry (LC-HG-AFS) method was developed for simultaneous determination of p-arsanilic acid (p-ASA) and roxarsone in feed. 20% Methanol aqueous was used as extraction reagent, after preprocessing samples by ultrasonic oscillation, then injected into the chromatography Waters symmetry shield RP18 analytical column (150mm x 4.6mm, 5 microm), finally detected by an atomic fluorescence spectrometer. The calibration curves of analyses were linear over a range of concentrations (0.2-4mg L-1 and the correlation coefficients were higher than 0.9990. The limits of detection were 0.2 mg L-1. The method has been validated by linearity, precision and recovery. p-ASA and roxarsone in feed can be successfully and simultaneously determined using the developed method without a tedious pretreatment procedure.
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Affiliation(s)
- Jianjing Liu
- Institute of Quality Standards and Testing Technology of Agri-products, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
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Abstract
Liquid-core waveguide (LCW) brings about several advantages in CE. This review discusses some aspects of fundamental and practical importance involved in this method. Sensitivity in absorption and fluorescence detection is in general improved by more than one order of magnitude over usual crossbeam detection arrangements; the improvements come from the long light path in absorption detection and low light scattering in fluorescence detection. Versatile instrumental arrangements are another advantage of LCW in CE, leading to several detection schemes, some of which provide information that is not gained by usual capillary-end crossbeam detection, e.g. whole-capillary imaging, simultaneous monitoring of multicapillary separation, and kinetic evaluation. The high potential and perspectives of LCW in CE are discussed based on the state-of-the-art developments.
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Affiliation(s)
- Tetsuo Okada
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan.
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