scholarly journals The use of L-ascorbic acid in speciation of arsenic compounds in drinking water

2009 ◽  
pp. 165-175 ◽  
Author(s):  
Aleksandar Stanic ◽  
Sasa Jovanic ◽  
Nikola Marjanovic ◽  
Zvonimir Suturovic
Keyword(s):  
Ascorbic Acid ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Ph Value ◽  
Arsenic Speciation ◽  
Hydride Generation ◽  
Reaction Medium ◽  
Absorption Spectrometry ◽  
Arsenic Content ◽  
Arsonic Acid

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.

Arsenic content of Spanish cows' milk determined by dry ashing hydride generation atomic absorption spectrometry

1994 ◽  
Vol 61 (1) ◽  
pp. 83-89 ◽  
Author(s):  
M. Luisa Cervera ◽  
J. Carlos Lopez ◽  
Rosa Montoro
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Milk Powder ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Arsenic Content ◽  
Experimental Conditions ◽  
Milk Samples ◽  
Dry Ashing ◽  
Interference Study

SummaryThe arsenic content of cows' milk consumed in Spain was determined. A procedure using dry ashing hydride generation atomic absorption spectrometry was developed for the purpose. Experimental conditions for the destruction of organic matter were established and an interference study was carried out. The method developed has a detection limit of 0·1 ng/g, a relative SD of 5%, and a recovery (mean ± CSI) of 100 ± 4%. The accuracy of the method was checked by analysis of a certified sample of IAEA milk powder (mean ± CSI: certified, 4·85 ± 0·32 ng/g; found, 5·04 ± 0·81 ng/g). The proposed procedure was used to analyse cows' milk samples. The extremely low arsenic levels found do not present toxicological problems.

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