1 引 言 用电化学方法同时测定多种重金属离子已有一些报道,但在HAc-NaAc溶液中用乙醛酸缩氨基硫脲(GATSC)作配合剂的吸附伏安法同时测定Pb和Cd尚未见报道,在该体系中Pb和Cd的GATSC配合物均产生灵敏的吸附波,峰电位分别是-0,63和-0.43 V(υs.SCE),线性范围分别为1.0×10-8～3.0×10-7和1.0×10-8～6.0×10-7mol/L,该法用于测定农用井水中痕量铅和隔,结果令人满意。 1 Introduction The simultaneous determination of many heavy metal ions by electrochemical methods has been reported. However, simultaneous determination of Pb and Cd by adsorption voltammetry with glyoxylic thiosemicarbazone (GATSC) in HAc-NaAc solution has not been reported Reported that both GATSC complexes of Pb and Cd produced sensitive adsorption waves with peak potentials of -0,63 and -0.43 V (υs.SCE), respectively, with linear ranges of 1.0 × 10 -8 -3.0 × 10-7 and 1.0 × 10-8 ~ 6.0 × 10-7mol / L. The method was applied to the determination of trace lead and septum in well water with satisfactory results.