期刊
FOOD ANALYTICAL METHODS
卷 4, 期 2, 页码 251-257出版社
SPRINGER
DOI: 10.1007/s12161-010-9144-6
关键词
Slurry Sampling; Hydride Generation; Atomic Absorption Spectrometry; Inorganic Arsenic Speciation; Dietary Supplements
资金
- Chinese Education Ministry
- Science Foundation Education Office of Hebei Province [B2008000583]
A new, rapid, and sensitive method was developed for speciation analysis of inorganic arsenic in dietary supplements using slurry sampling hydride generation atomic absorption spectrometry. As(III) content was determined under 1% HCl acidity conditions using both inhibitory effect of 8-hydroxyquinoline (8-HQ) on As(V) and its enhancing effect on As(III). Total inorganic arsenic content was determined under 5% HCl acidity conditions using the enhancing effect of 8-HQ on both As(III) and As(V). The method detection limit (S/N = 3) was 4.0 mu g kg(-1) for As(III) and 4.5 mu g kg(-1) for total inorganic arsenic. This method was validated using the Chinese standard method (GB/T 5009.11-2003), in good agreement with total inorganic arsenic content in real samples. The developed method was successfully applied to the speciation analysis of inorganic arsenic in dietary supplements with satisfactory results.
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