本文用强吸附法研制了8-羟基喹啉化学修饰电极,并将其用于人体中痕量锌的分析。由于修饰电极上的8-羟基喹啉能与锌生成疏水性螯合物,从而大大提高了电极的选择性富集效率,使此法具有较高的灵敏度和较好的选择性。在测定血液、头发、指甲等人体样品时,一般不需加镓克服电极上铜锌互化物的生成,就可直接测定锌,方法检出下限为7.6×10~(10mol)/L(受空白所限)。实测人体样品,锌的回收率为93.4±5.7％(X±SD),变异系数CV=6.1％。 In this paper, 8-hydroxyquinoline chemically modified electrode was developed by strong adsorption method and used for the analysis of trace zinc in human body. Since the 8-hydroxyquinoline on the modified electrode can form hydrophobic chelate with zinc, the selective enrichment efficiency of the electrode is greatly improved, and the method has higher sensitivity and better selectivity. In the determination of blood, hair, nails and other human samples, generally do not need to add gallium to overcome the electrode copper and zinc on the formation of intermediates, zinc can be directly measured, the detection limit was 7.6 × 10 ~ (10mol) / L Limited). The measured body samples, zinc recovery was 93.4 ± 5.7% (X ± SD), coefficient of variation CV = 6.1%.