选择双硫腙为络合剂、Triton X-114为表面活性剂,以浊点萃取为样品前处理技术,富集水样中的痕量镉并用石墨炉原子吸收光谱法测定。对影响预富集的条件进行讨论并建立最佳条件,此方法可以应用于水样中镉的测定。在最优条件下,镉的检出限为0.015μg/L。 Dithizone was chosen as the complexing agent. Triton X-114 was used as surfactant. Cloud point extraction was used as the sample pretreatment technology. The trace amounts of cadmium in water samples were enriched and determined by graphite furnace atomic absorption spectrometry. The preconcentration conditions were discussed and the optimal conditions were established. This method can be applied to the determination of cadmium in water sample. Under the optimal conditions, the detection limit of cadmium was 0.015μg / L.