Inorganic arsenic speciation in rice products using selective hydride generation and atomic absorption spectrometry (AAS)

2017 ◽  
Vol 133 ◽  
pp. 265-271 ◽  
Author(s):  
Greice Magalhães dos Santos ◽  
Dirce Pozebon ◽  
Camila Cerveira ◽  
Diogo P. de Moraes
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Arsenic Speciation ◽  
Hydride Generation ◽  
Inorganic Arsenic ◽  
Absorption Spectrometry

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.

scholarly journals Determination of inorganic arsenic and its organic metabolites in urine by flow-injection hydride generation atomic absorption spectrometry

1993 ◽  
Vol 39 (8) ◽  
pp. 1662-1667 ◽  
Author(s):  
C P Hanna ◽  
J F Tyson ◽  
S McIntosh
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Injection ◽  
Extraction Procedure ◽  
Hydride Generation ◽  
Inorganic Arsenic ◽  
Absorption Spectrometry ◽  
Urine Specimen ◽  
Separation Procedure

Abstract A method has been developed for the determination of inorganic arsenic [As(III) and As(V)] and its organic metabolites (monomethylarsenic and dimethylarsenic) in urine by flow-injection hydride generation atomic absorption spectrometry. The nontoxic seafood-derived arsenobetaine and arsenocholine species were first separated by a solid-phase extraction procedure. The remaining sample was digested with a mixture of nitric and sulfuric acids and potassium dichromate, followed by attack with hydrogen peroxide. The resulting As(V) was reduced to As(III) with potassium iodide in hydrochloric acid before injection into the flow-injection manifold. The percentage analytical recoveries (mean +/- 95% confidence interval) of various arsenic species added to a urine specimen at 250 micrograms/L were 108 +/- 2, 112 +/- 11, 104 +/- 7, and 95 +/- 5 for As(III), As(V), monomethylarsenic, and dimethylarsenic, respectively. For the determination of arsenic in Standard Reference Material 2670 (toxic metals in human urine), results agreed with the certified value (480 +/- 100 micrograms/L). Analyses of samples for the Centre de Toxicologie du Quebec, containing seafood-derived species, demonstrated the viability of the separation procedure. Detection limits were between 0.1 and 0.2 microgram/L in the solution injected into the manifold, and precision at 10 micrograms/L was between 2% and 3% (CV). These preliminary results show that the method might be applicable to determinations of arsenic in a range of clinical urine specimens.

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