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本文研究了Cu(Ⅱ)在8-羟基喹啉修饰玻碳电极上的阳极溶出伏安特性。电极过程为不可逆过程。当底液为0.1MHAc-0.1MNaAc溶液,预电解电位为-0.6V(Vs.Ag-AgCl)时,铜的阳极溶出峰高比未修饰的纯玻碳电极提高约5倍。检出限可低至0.05ng/ml.150倍Cu(Ⅱ)浓度的Fe~(3+)、50倍的Zn~(2+)、Mn~(2+)、Cr~(3+)、Tl~+,25倍的Co~(2+)、Sn~(2+)、Ni~(2+)、Bi~(3+)、Pb~(2+),5倍的Sb~(3+)、Cd~(2+)和2倍的Hg~(2+)对铜的溶出峰不影响。本法测定了尿铜,对4ng/ml的Cu(Ⅱ)测得回收率为96—109％。
In this paper, the anodic stripping voltammetry of Cu (Ⅱ) on 8-hydroxyquinoline modified glassy carbon electrode was studied. Electrode process is irreversible process. When the bottom solution is 0.1MHAc-0.1M NaCl solution and the pre-electrolysis potential is -0.6V (Vs. Ag-AgCl), the anodic dissolution peak of copper is about 5 times higher than that of unmodified pure glassy carbon electrode. The detection limit could be as low as 0.05ng / ml.150times of Fe3 +, 50times Zn2 +, Mn2 +, Cr3 +, Cu2 + (2 +), Sn 2+, Ni 2+, Bi 3+, Pb 2+, and Sb + ), Cd ~ (2+) and 2 times Hg ~ (2+) did not affect the dissolution peak of copper. Urine copper was determined by this method. The recovery of Cu (II) at 4 ng / ml was 96-109%.