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High Sensitive Spectrophotometric Determination Method of Arsenic from Water
Corresponding Author(s) : Tran Van Chung
Asian Journal of Chemistry,
Vol. 27 No. 10 (2015): Vol 27 Issue 10
Abstract
Arsenic present in water may be determined by many methods such as atomic adsorption spectroscopy, inductively coupled plasma atomic emission spectroscopy, electrochemistry and spectrophotometry with silver diethyldithiocarbamate. This study presents the determination of arsenic present in water by spectrophotometric method based on molybdate reagent. This method is highly sensitive and selective but has not been studied in detail. The obtained results exhibited the experimental optimum conditions for arsenic determination by spectrophotometric method using molybdate reagent. The method consists of two steps (i) arsinization producing AsH3, (ii) AgNO3, H2O2 oxidized AsH3 reacting with molybdate reagent to produce molybdenum blue. The absorbance of molybdenum blue at the wavelength of l = 878 nm has been used for arsenic determination. The limit of detection and limit of quantitation of the method are 2 and 7 ppb respectively
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- P.L. Smedley and D.G. Kinniburgh, Appl. Geochem., 17, 517 (2002); doi:10.1016/S0883-2927(02)00018-5.
- M. Berg, H.C. Tran, T.C. Nguyen, H.V. Pham, R. Schertenleib and W. Giger, Environ. Sci. Technol., 35, 2621 (2001); doi:10.1021/es010027y.
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- A.H. Smith, E.O. Ligas and M. Rahman, Bull. World Health Organ., 78, 1093 (2000).
- P. Elmer, Water and Environmental Analysis (According to US EPA Regulations) (1995).
- A.M. Farnet, L. Qasemian, D. Guiral and E. Ferré, Pedobiologia (Jena), 53, 159 (2010); doi:10.1016/j.pedobi.2009.09.001.
- R.K. Dhar, Y. Zheng, J. Rubenstone and A.van Geen, Anal. Chim. Acta, 526, 203 (2004); doi:10.1016/j.aca.2004.09.045.
- V. Lenoble, V. Deluchat and B. Serpaud, Talanta, 61, 267 (2003); doi:10.1016/S0039-9140(03)00274-1.
- S. Tsang, F. Phu, M.M. Baum and G.A. Poskrebyshev, Talanta, 71, 1560 (2007); doi:10.1016/j.talanta.2006.07.043.
References
P.L. Smedley and D.G. Kinniburgh, Appl. Geochem., 17, 517 (2002); doi:10.1016/S0883-2927(02)00018-5.
M. Berg, H.C. Tran, T.C. Nguyen, H.V. Pham, R. Schertenleib and W. Giger, Environ. Sci. Technol., 35, 2621 (2001); doi:10.1021/es010027y.
WHO, WHO Fact Sheet (2001).
A.H. Smith, E.O. Ligas and M. Rahman, Bull. World Health Organ., 78, 1093 (2000).
P. Elmer, Water and Environmental Analysis (According to US EPA Regulations) (1995).
A.M. Farnet, L. Qasemian, D. Guiral and E. Ferré, Pedobiologia (Jena), 53, 159 (2010); doi:10.1016/j.pedobi.2009.09.001.
R.K. Dhar, Y. Zheng, J. Rubenstone and A.van Geen, Anal. Chim. Acta, 526, 203 (2004); doi:10.1016/j.aca.2004.09.045.
V. Lenoble, V. Deluchat and B. Serpaud, Talanta, 61, 267 (2003); doi:10.1016/S0039-9140(03)00274-1.
S. Tsang, F. Phu, M.M. Baum and G.A. Poskrebyshev, Talanta, 71, 1560 (2007); doi:10.1016/j.talanta.2006.07.043.