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在pH9.50的1.60 mol/L NH_3·H_2O-NH_4Cl缓冲液体系中,铜(Ⅱ)-2-氨基-4-苯基噻唑-3,5-二溴水杨醛络合物在单扫描示波极谱仪上于-0.36 V(vs.SCE)处产生一灵敏的吸附还原波,其2.5次微分吸附波灵敏度高,波形好.峰值e_(pp)与铜(Ⅱ)浓度在4.0×10~(-8)～6.5×10~(-6)mol/L范围内呈良好的线性关系;其检测限为1.0×10~(-8)mol/L Cu(Ⅱ).该法用于合金试样中微量铜测定,结果较好.本文对络合物的组成及波的性质进行了探讨.
The complex of copper (Ⅱ) -2-amino-4-phenylthiazole-3,5-dibromosalicylaldehyde in a 1.60 mol / L NH_3 · H_2O-NH_4Cl buffer at pH9.50 The polarographic absorption wave at -0.36 V (vs.SCE) produces a sensitive adsorption-reduction wave with a 2.5-fold differential adsorption wave with high sensitivity and good waveform. The peak e_ (pp) and copper (II) ~ (-8) ~ 6.5 × 10 ~ (-6) mol / L with a detection limit of 1.0 × 10 ~ (-8) mol / L Cu (Ⅱ) The determination of trace copper in the sample shows good results. The composition of the complex and the nature of the wave are discussed in this paper.