Sequential Determination of Arsenic,Tin and Antimony in Beverage by Atomic Fluorescence Spectrometry

[Objective] To establish a method for sequential determination of arsenic,tin and antimony in beverage by hydride generation-atomic fluorescence spectrometry.[ Methods] In a sample digestion,the content of arsenic,tin and antimony were determined by hydride generation-atomic fluorescence spectrometry using L-Cysteine as the prereduction agent.[Results]Under the best conditions(1%HCI,2.0%KBH4,2.0%L-Cysteine)for the given method,there was no interference when determining the content of arsenic,tin and antimony in the presence of 40 mL/L Fe3+,Pb2+,50 mg/L Cu2+,Mn2+,Zn2+,Se4+, Hg+,Bi3+,and 10 mg/L Cr6+,and Cd2+.The recovery rates were in the ranges of 91.3%-97.0%,92.5%-106.1%,and 90.0%-106.2% respectively.The detection limits were 0.35,0.35,and 0.31 μg/L respectively.[ Conclusion] This method is of characteristic that less reagent,less pollution,lower detection limit,wider linear range and less interference,therefore it is applicable to the determination of arsenic,tin and antimony in beverages.