Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7587156 | Food Chemistry | 2016 | 7 Pages |
Abstract
The inorganic fraction of arsenic species, iAs = â[As(III) + As(V)] present in fish samples can be quantified in the presence of other arsenic species also found in fishes, such as: monomethylarsonic acid (MMA), dimethylarsinic acid (DMA) and arsenobetaine (AsB). The toxic arsenic fraction was selected taking into account the dissociation constants of these arsenic species in different hydrogen ions concentration leading to the arsine formation from iAs compounds detected as As(III) by HG AAS. For thus, a microwave assisted extraction was carried out using HCl 1 mol Lâ1 in order to maintain the integrity of the arsenic species in this mild extraction media. Recovery experiments were done for iAs fraction, in the presence of other arsenic species. The recovery values obtained for iAs fraction added were quantitative about 87-107% (for N = 3, RSD ⩽ 3%). The limit of detection (LOD), and the limit of quantification (LOQ), were 5 μg kgâ1 and 16 μg kgâ1 respectively.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Andrea Oliveira, Mario Henrique Gonzalez, Helena Müller Queiroz, Solange Cadore,