硫脲在Cu~(2+)-KBr-氨基乙酸体系中,在单描示极谱上有灵敏的队极导数极谱波。峰高与硫脲浓度在1×10~(-8)～5×10~(-7)M范围内有良好的线性关系,检测限可达5×10~(-8)M,本法除S~(2-)、Ag~+、Au~(3+)离子有较大干扰外,其他共存离子的干扰均不大。采用本法测定了以硫脲为添加剂的电镀废水中的硫脲含量。结果尚属满意。研究了极谱波的性质,讨论了极谱波的产生机理。 Thiourea has sensitive polarographic polarographic polarographic polarographic waveforms in single-labeled polarographic spectra in the Cu ~ (2 +) - KBr-glycine system. The peak height and the concentration of thiourea in the range of 1 × 10 -8 ~ 5 × 10 -7 M have a good linear relationship with the detection limit of up to 5 × 10 -8 M, S ~ (2 -), Ag ~ +, Au ~ (3+) ions have a greater interference, the interference of other coexisting ions are not large. Using this method, thiourea content in electroplating wastewater with thiourea as additive was determined. The result is still satisfactory. The properties of polarographic wave were studied, and the mechanism of polarographic wave generation was discussed.