Determination of Trace Arsenic by Hydride Generation Atomic Fluorescence Spectrometry in Ground Water

In this work,a sensitive and robust analytical procedure for the determination of arsenic in ground water(Yangtse Rive,Hanjiang River,Easte Lake,Moshui Lake) by hydride generation atomic fluorescence spectrometry has been developed.The conditions of instrumentation and vapor generation of arsenic were optimized.The interferences of coexisting ions were investigated carefully.Five hundred milligrams per liter of Fe3+,Pb2+,Mn2+,Cu2+,Ca2+,Na+,K+,Mg2+ do not interfere with the determination of As.Under optimal conditions,the detection limits for arsenic was determined to be 0.092 ng/mL.The precision for twelve replicate determinations at the 7.27 ng/mL of arsenic was 3.82%.Good agreement has been demonstrated between results obtained by the methods and content of the national standard product.The proposed method was successfully applied to the determination of arsenic in Wuhan continental water.