Abstract: The various test conditions and effect factors for determination of cadmium were discussed and a method for thedirect determination of cadmium tee samples by using graphite furnace atomic absorption spectrometry with solid suspensionsampling was developed. Agar sol is used as a suspending agent. Ground and sieved sample is suspended homogeneously in the0.15% agar sol and injected into the graphite furnace by an autosampler, and cadmium in the samples are determined directly byusing matrix modifier techniques without chemical treatment. Thus, the tedious chemical pretreatment is omitted. The detectionlimit for cadmium was 0.065μg/L under optimum conditions. The linear range was 0～10μg/L. The relative standard deviationwas less than 5% and the recoveries of cadmium in tea standard samples were 94%～106%. The results show that the methodis accurate, simple, rapid with no interference. It has been applied to the determination of tea standard sample with satisfactoryresults.

Key words: Solid suspension sampling, Graphite furnace atomic absorption spectrometry, Tea, cadmium