Determination of Trace Arsenic in Geological Samples by Flow Injection Hydride Generation Vapor Store and Pulsed Sampling Atomic Fluorescence Speetrometry

A method for the determination of trace arsenic in geological samples by flow injection hydride generation vapor store and pulsed sampling atomic fluorescence spectrometry has been developed. The performances of two kinds of vapor store system have been compared with.The analytical sensitivity of arsenic has incrested by 1760 percent,The detection limit is 0.32ng/mL and relative standard deviation (RSD)2.1%.Analytical results of geological stsndard reference materials are satisfactory.