Determination of arsenic (III) and arsenic (V) in freshwater biological samples from Thailand by solvent extraction and neutron activation

Zwicker, R.; Zwicker, B.; Laoharojanaphand, S.; Chatt, A.

doi:10.1007/s10967-010-0670-x

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…Rice is cultivated on 159 million ha and it is estimated that, for 3 billion people, 35-60% of their dietary calorie intake is through rice consumption (Fageria, 2007;GRISP, 2012;Vasudevan, Mathad, Doddagoudar, & Shakuntala, 2014). The toxicity of As is dependent on the chemical form present (Gong, Lu, Ma, Watt, & Le, 2002;Juskelis, Li, Nelson, & Cappozzo, 2013;Syu, Huang, Jiang, Lee, & Lee, 2015;Zwicker, Zwicker, Laoharojanaphand, & Chatt, 2011). Inorganic arsenic species (iAs) are classified as a class I carcinogen (IARC, 2004;Munera-Picazo et al, 2014;Weinber, 2004), and are more toxic and carcinogenic than organic species (Ammann, 2011;Henke, 2009).…”

Section: Introductionmentioning

confidence: 99%

Comparison of on-site field measured inorganic arsenic in rice with laboratory measurements using a field deployable method: Method validation

et al. 2018

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A commercial arsenic field kit designed to measure inorganic arsenic (iAs) in water was modified into a field deployable method (FDM) to measure iAs in rice. While the method has been validated to give precise and accurate results in the laboratory, its on-site field performance has not been evaluated. This study was designed to test the method on-site in Malawi in order to evaluate its accuracy and precision in determination of iAs on-site by comparing with a validated reference method and giving original data on inorganic arsenic in Malawian rice and rice-based products. The method was validated by using the established laboratory-based HPLC-ICPMS. Statistical tests indicated there were no significant differences between on-site and laboratory iAs measurements determined using the FDM (p = 0.263, ά = 0.05) and between on-site measurements and measurements determined using HPLC-ICP-MS (p = 0.299, ά = 0.05). This method allows quick (within 1 h) and efficient screening of rice containing iAs concentrations on-site.

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Section: Introductionmentioning

confidence: 99%

Comparison of on-site field measured inorganic arsenic in rice with laboratory measurements using a field deployable method: Method validation

et al. 2018

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“…Recently, sample separation and pretreatment procedures such as solid phase extraction (SPE) [3][4][5][6][7], solvent extraction [8], and cloud point extraction (CPE) [9][10][11] have been used prior to determination of As species. The most versatile and simple method for preconcentration and extraction, i.e., CPE, is based on the observation that most non-ionic surfactants form micelles in aqueous solutions, and the solutions become turbid when heated to the cloud point temperature.…”

Section: Introductionmentioning

confidence: 99%

Cloud point extraction for trace inorganic arsenic speciation analysis in water samples by hydride generation atomic fluorescence spectrometry

Wang

Zhong

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…So, in spite of developments in modern analytical instruments, preconcentration processes are needed for environmental samples. For the speciation of As(III) and As(V), the separation and preconcentration methods reported in the literature are usually based on hydride generation, 10,11 liquid-liquid extraction, 12 solid phase extraction [13][14][15][16][17] and coprecipitation 18,19 etc. However, disadvantages such as their time consuming nature, unsatisfactory enrichment factors, the large amounts of organic solvents required and the production of secondary wastes limit their applications.…”

Section: Introductionmentioning

confidence: 99%

Application of multi-factorial experimental design to successfully model and optimize inorganic arsenic speciation in environmental water samples by ultrasound assisted emulsification of solidified floating organic drop microextraction

et al. 2014

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Ultrasound assisted emulsification of solidified floating organic drop microextraction (USAE-SFODME), combined with electrothermal atomic absorption spectrometry (ETAAS), was developed for the preconcentration and determination of trace amounts of As(III) and As(V) in environmental water samples. At pH ¼ 1, As(III) formed complexes with ammonium pyrrolidine dithiocarbamate (APDC) and these were extracted into the fine droplets of 1-dodecanol (extraction solvent) which were dispersed with the aid of ultrasonication into the water sample solution. After extraction, the organic phase was separated by centrifugation, and was solidified by transferring into an ice bath. The solidified solvent was transferred to a vial and melted quickly at room temperature. As(III) was determined in the melted organic phase while As(V) remained in the aqueous layer. Total inorganic As was determined after the reduction of the pentavalent forms of arsenic with sodium thiosulphate and potassium iodide. The concentration of As(V) was calculated as the difference between the concentrations of total inorganic As and As(III). The variables of interest in the USAE-SFODME method, such as the volume of extraction solvent, pH, concentration of APDC (chelating agent), sonication time and salt effect were optimized using multivariate optimization approaches. A fractional factorial design (FFD) for screening and a central composite design for optimizing the significant variables were applied. A mathematical model was presented that successfully predicts changes in the response, depending on the input variables. Under the optimum conditions, the proposed method has been successfully used for the determination of inorganic arsenic in different environmental water samples and certified reference material (NIST RSM 1643e).

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Determination of arsenic (III) and arsenic (V) in freshwater biological samples from Thailand by solvent extraction and neutron activation

Cited by 15 publications

References 24 publications

Comparison of on-site field measured inorganic arsenic in rice with laboratory measurements using a field deployable method: Method validation

Comparison of on-site field measured inorganic arsenic in rice with laboratory measurements using a field deployable method: Method validation

Cloud point extraction for trace inorganic arsenic speciation analysis in water samples by hydride generation atomic fluorescence spectrometry

Application of multi-factorial experimental design to successfully model and optimize inorganic arsenic speciation in environmental water samples by ultrasound assisted emulsification of solidified floating organic drop microextraction

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