THE USE OF L-ASCORBIC ACID IN SPECIATION OF ARSENIC COMPOUNDS IN DRINKING WATER

Arsenic speciation, besides total arsenic content determination, is very important in analysis of water, foodstuffs, and environmental samples, because of varying degrees of toxicity of different species. For such purpose hydride generation atomic absorption spectrometry can be used based on the generation of certain types of hydride, depending on the pH value and pretreatment in different reaction media. In this study, we have investigated the effect of L-ascorbic acid as the reaction medium as well as the pre-reducing agent in speciation of arsenic by hydride generation-atomic absorption spectrometry in order to determine monomethyl arsonic acid (MMA) in the presence of inorganic forms of arsenic.

[1]  M. Guardia,et al.  Non-chromatographic speciation of inorganic arsenic in mushrooms by hydride generation atomic fluorescence spectrometry , 2009 .

[2]  S. Musil,et al.  On-line pre-reduction of pentavalent arsenicals by thioglycolic acid for speciation analysis by selective hydride generation-cryotrapping-atomic absorption spectrometry. , 2008, Spectrochimica acta. Part B, Atomic spectroscopy.

[3]  M. Simon,et al.  Assessment of total arsenic and arsenic species stability in alga samples and their aqueous extracts. , 2008 .

[4]  M. de la Guardia,et al.  Non-chromatographic speciation of toxic arsenic in vegetables by hydride generation-atomic fluorescence spectrometry after ultrasound-assisted extraction. , 2008, Talanta.

[5]  T. Stafilov,et al.  Influence of EDTA, carboxylic acids, amino- and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry , 2008 .

[6]  Jixin Liu,et al.  A new hydride generation system applied in determination of arsenic species with ion chromatography-hydride generation-atomic fluorescence spectrometry (IC-HG-AFS). , 2007, Talanta.

[7]  M. Guardia,et al.  Determination of arsenite, arsenate, monomethylarsonic acid and dimethylarsinic acid in cereals by hydride generation atomic fluorescence spectrometry , 2007 .

[8]  S. V. C. Souza,et al.  In-house method validation : Application in arsenic analysis , 2007 .

[9]  S. Chanthai,et al.  Speciation Analysis of Arsenic (III), Arsenic (V) and Total Arsenic by Continuous Flow HG-AAS in Thai Fruit Wines and Distilled Spirits. , 2007 .

[10]  Ioan Marginean,et al.  Optimisation of analytical parameters in inorganic arsenic (III and V) speciation by hydride generation using L-cysteine as prereducing agent in diluted HCl medium , 2006 .

[11]  P. Niedzielski,et al.  Speciation analysis of inorganic form of arsenic in ground water samples by hydride generation atomic absorption spectrometry with insitu trapping in graphite tube , 2005 .

[12]  G. Stöhrer.  Arsenic: opportunity for risk assessment , 2005, Archives of Toxicology.

[13]  J. Burguera,et al.  Determination of various arsenic species by flow injection hydride generation atomic absorption spectrometry: investigation of the effects of the acid concentration of different reaction media on the generation of arsines , 2001 .

[14]  P. V. Ioannou.  On the Direct Reduction of Arsonic Acids to Arsenoso Compounds: Mechanisms and Preparations , 2000 .

[15]  A. Shraim,et al.  Use of perchloric acid as a reaction medium for speciation of arsenic by hydride generation-atomic absorption spectrometry. , 2000, The Analyst.

[16]  Jorge Loredo,et al.  Geochemical characterisation of mercury mining spoil heaps in the area of Mieres (Asturias, northern Spain) , 1999 .

[17]  A. Shraim,et al.  Speciation of arsenic by hydride generation-atomic absorption spectrometry (HG-AAS) in hydrochloric acid reaction medium. , 1999, Talanta.

[18]  D. Valero,et al.  Arsenic toxicity and accumulation in turnip as affected by arsenic chemical speciation. , 1999, Journal of agricultural and food chemistry.

[19]  D. Vélez,et al.  Rapid and quantitative release, separation and determination of inorganic arsenic [As(III)+As(V)] in seafood products by microwave-assisted distillation and hydride generation atomic absorption spectrometry , 1999 .

[20]  P. Bermejo-Barrera,et al.  Selective medium reactions for the `arsenic(III)', `arsenic(V)', dimethylarsonic acid and monomethylarsonic acid determination in waters by hydride generation on-line electrothermal atomic absorption spectrometry with in situ preconcentration on Zr-coated graphite tubes , 1998 .

[21]  Laurie S. McNeill,et al.  Considerations in As analysis and speciation , 1998 .

[22]  J. Burguera,et al.  On-line cryogenic trapping with microwave heating for the determination and speciation of arsenic by flow injection/hydride generation/atomic absorption spectrometry. , 1998, Talanta.

[23]  M. Moore,et al.  Speciation of arsenic metabolites in the urine of occupational workers and experimental rats using an optimised hydride cold-trapping method. , 1998, The Analyst.

[24]  D. Tsalev,et al.  Fast automated determination of toxicologically relevant arsenic in urine by flow injection-hydride generation atomic absorption spectrometry , 1997 .

[25]  E. Hansen,et al.  Determination of As(III) and As(V) by flow injection-hydride generation-atomic absorption spectrometry via on-line reduction of As(V) by KI , 1997 .

[26]  T. Hung,et al.  Arsenic species in the well water and sediments of the blackfoot disease area in Taiwan , 1996 .

[27]  A. Smith,et al.  Methylation study of a population environmentally exposed to arsenic in drinking water. , 1996, Environmental health perspectives.

[28]  C. Ferreccio,et al.  [Bronchopulmonary cancer in workers exposed to arsenic: a case control study]. , 1996, Revista medica de Chile.

[29]  Paul J. Worsfold,et al.  Heavy metals in soils , 1995 .

[30]  H. Rüssel,et al.  Determination of total arsenic and speciation of arseno-betaine in marine fish by means of reaction — headspace gas chromatography utilizing flame-ionization detection and element specific spectrometric detection , 1994 .

[31]  A. Howard,et al.  Arsenic speciation and distribution in the Carnon Estuary following the acute discharge of contaminated water from a disused mine , 1994 .

[32]  I. Thornton,et al.  Arsenic, antimony and bismuth in soil and pasture herbage in some old metalliferous mining areas in England , 1993, Environmental geochemistry and health.

[33]  J. Fergusson.  The Heavy Elements: Chemistry, Environmental Impact and Health Effects , 1990 .

[34]  V L Henderson,et al.  Exposure to arsenic and respiratory cancer. A reanalysis. , 1987, American journal of epidemiology.

[35]  M. Thompson,et al.  Selective reduction of arsenic species by continuous hydride generation. Part I. Reaction media , 1986 .

[36]  I. Thornton,et al.  Arsenic in garden soils and vegetable crops in Cornwall, England: Implications for human health , 1985, Environmental geochemistry and health.

[37]  A. Kabata-Pendias.  Trace elements in soils and plants , 1984 .

[38]  W. Fritz.  WHO-IARC Monographs on the evaluation of the carcinogenic risk of chemicals to humans. Vol. 23. Einige Metalle und Metall-Verbindungen. 438 Seiten. International Agency for Research on Cancer, Lyon 1980. Preis: 50,00 sfrs; 30,00 US $ , 1982 .

[39]  C. Feldman.  Improvements in the arsine accumulation-helium glow detector procedure for determining traces of arsenic , 1979 .

[40]  W. Fritz.  WHO‐IARC‐Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans, Vol. 17: Some N‐Nitroso‐Compounds. 365 Seiten. International Agency for Research on Cancer, Lyon 1978. Preis: 50.‐ sfrs; 25,‐ US$ , 1979 .

[41]  J. Cannon,et al.  ISOLATION, CRYSTAL STRUCTURE, AND SYNTHESIS OF ARSENOBETAINE, THE ARSENICAL CONSTITUENT OF THE WESTERN ROCK LOBSTER PANULIRUS LONGIPES CYGNUS GEORGE , 1977 .

[42]  S. N. Linzon,et al.  Contamination of vegetation and soil by arsenic emissions from secondary lead smelters , 1977 .