Determination of trace cadmium in geosamles by graphite furnace atomic absorption spectrometry with slurry sampling

A method for the determination of trace cadmium in geosamples by graphite fuenace atomic absorption spectrometry(GFAAS) with slurry sampling has been presented.The influence of GAAS operation conditions,matrix modifiers and slurry stability agents have been studied.The liner range for determination of cadmium was 0~4.0 μg·L~(-1).Experimental condition limit was 2.1 pg·g~(-1),the raletive standard deviation was less than 5.5% (RSD,n=4) and the recovery rate was 95%～99%.The proposed method was rapid,simple and accurate.It has been applied to determine trace cadmium in national standard samples with satisfactory results.