Abstract： In pH 7.7 Na2HPO4-NaH2PO4 buffer solution, the complex formed from Zn and quercetin produced an adsorptive polarographic wave at the peak potential －1.15 V (vs. SCE) and the peak current of the wave increased after addition of KClO3.Values of 2nd derivative of peak current were found to keep linear relationship with the concentration of Zn in the range of 8.0×10-9 -6.0×10-6 mol/L, with its detection limit (3s/N) of 5.0×10-9 mol/L. The results for study of adsorptive and catalytic properties of polarographic wave showed that the wave was adsorptive catalytic wave. The proposed method was used to the analysis of Zn in natural water samples. The results were in consistency with those obtained by AAS. Tests for recovery were carried out by addition of Zn standard solution to the sample as matrix, giving recovery of 95.7%-104.6%.
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