[Determination of inorganic arsenic in food by hybrid generation-atomic fluorescence spectrometry (HG-AFS)].
A hybrid generation-atomic fluorescence spectrometry method (HG-AFS) was developed for determining total inorganic arsenic, As(III) and As(V). The inorganic arsenic in food extracted by 6 mol/L HCl and total inorganic arsenic could be determined in 2 mol/L HCl. As(III) was determined selectively in mixtures of As(III) with As(V) by the different acidities of As(III) and As(V) at hybrid generation. The linear correlation ranges of total inorganic arsenic and As(III) are 0-400 micrograms/ml and 0-300 micrograms/ml respectively. The RSD of inorganic arsenic is 1.93% and As(III) is 2.49%. The detection limits are 1.6 and 1.1 micrograms/ml for inorganic arsenic and As(III) respectively. There is no interference in the determination of general food samples.
Gu
W
W
Institute of Food Hygiene and Inspection, Ministry of Public Health, Beijing 100021, China.
Yang
H
H
D001151:Arsenic / Q000032:analysis*; D005506:Food Contamination; D013050:Spectrometry, Fluorescence / Q000379:methods
D001151:Arsenic