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在乙二胺-8-羟基喹啉底液中,Cu~(2+),Pb~(2+),Cd~(2+),Zn~(2+)能产生灵敏的络合物吸附波,导数峰电位依次为-0.61V,-0.74V,-0.94V,-1.4V(vs SCE)。测定下限均为5×10~(-8)M。线性范围依次为0-3×10~(-6)M,0-4×10~(-6)M,0-6×10~(-6)M和0-1.5×10~(-5)M。应用本法同时测定多种水样的Cu~(2+),Pb~(2+),Cd~(2+),Zn~(2+),结果良好。实验部分 1.主要仪器和试剂:JP-1A型示波极谱仪(成都仪器厂)。铜,铅,镉,锌标准液:以纯金属配制,使用时稀释至所需浓度。混合液I:0.5M 柠檬酸三钠和0.01M Mg~(2+)。混合液
In the reaction of ethylenediamine-8-quinolinol, Cu 2+, Pb 2+, Cd 2+, and Zn 2+ can produce sensitive complex adsorption wave , The derivative peak potentials were -0.61V, -0.74V, -0.94V, -1.4V (vs SCE). The lower limit of determination is 5 × 10 ~ (-8) M. The linear range was 0-3 × 10 -6 M, 0-4 × 10 -6 M, 0-6 × 10 -6 M and 0-1.5 × 10 -5, M. The method was applied to the simultaneous determination of Cu2 +, Pb2 +, Cd2 +, Zn2 + in various water samples with good results. Experimental part 1. The main instruments and reagents: JP-1A-type oscilloscope (Chengdu Instrument Factory). Copper, lead, cadmium, zinc Standard solution: made of pure metal, when used diluted to the desired concentration. Mixture I: 0.5M trisodium citrate and 0.01M Mg ~ (2+). Mixture