Determination of Antimony in Beverage by Hydride Generation Atomic Fluorescence Spectrometry

Objective To establish a method for determination of antimony in beverage by hydride generation-atomic fluorescence spectrometry.Methods The content of antimony was determined by hydride generation-atomic fluorescence spectrometry while L-cysteine as the reducing-agent.Results In the best conditions (1%HCl,2%KBH4,2% L-cysteine) for the given method,there was no interference when determining the content of antimony in the presence of 40 mg/L Fe~(3+),Pb~(2+),50 mg/L Cu~(2+),Mn~(2+),Zn~(2+),Sn~(2+),Se~(4+),Hg~(2+),As~(3+),Bi~(3+) and 10 mg/L Cr~(6+),Cd~(2+).The linear regression equation was y=65.1 x+13.2 for this method in the case 0-60.0μg/ml.The related coefficient (r) was 0.999 9,the detection hmit was 0.35μg/L,the recovery rate was in the range of 89.50%-103.75%.The RSDs were 1.51% and 1.22%.Compared with the national standard methods,no significant difference was seen between the results (P0.05).Conclusion This method is of characteristic that less reagent,less pollution, lower detection limit,higher sensitivity and reproducibility,wider linear range,less interference and is applicable to the determination of antimony in beverage.