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关于烟酸根与镉离子在溶液中螯合稳定性的研究尚未见报道。我们首先按文献[1,2]所述方法验证了镉离子-烟酸根体系[μ=0.8(用NaClO_4维持),含硝酸镉5×10~(-4)M的0.1M烟酸根溶液]的电极过程是扩散控制的,电极反应是可逆的。证明了这一体系可以用极谱法进行研究。我们用徐光宪等从极谱半波电势求络离子逐级稳定常数的方法研究了烟酸镉体系。
The study on the chelate stability of nicotinate and cadmium ions in solution has not been reported yet. We first validated the cadmium-nicotinate system [μ = 0.8 (maintained with NaClO_4) and 0.1 M nicotinate solution containing 5 × 10 ~ (-4) M cadmium nitrate) as described in [1,2] The electrode process is diffusion controlled and the electrode reaction is reversible. It is proved that this system can be studied by polarography. We used Xu Guangxian and other polarographic half-wave potentials obtained by step-by-step stable ionic stability of the cadmium nicotinate system.