摘要
在醋酸－醋酸钠缓冲溶液中，铜（Ⅱ）、铅（Ⅱ）和镉（Ⅱ）与碘（Ⅰ）都可生成稳定络合物，并且能在滴汞电极表面被吸附，产生灵敏的络合吸附波，示波极谱的峰电位（ＶＳＳＣＥ）依次为－０．５３Ｖ．－０．６６Ｖ和－０．８２Ｖ。本法测定上述三种物质的灵敏度均可达到１０－８ｍｏｌ／Ｌ数量级，具峰电流值与铜（Ⅱ）．铅（Ⅱ）和镉的浓度的线性范围依次为６．４ｘ１０－９－３．３ｘ１０－８ｍｏｌ／Ｌ．０－４．１ｘ１０－８ｍｏｌ／Ｌ和０－５ｘ１０－８ｍｏｌ／Ｌ。采用此底液不但灵敏度高，吸附波形好，能同时测定多种物质，而且１２小时内峰电流不发生明显的改变，此法便于在水质监测中应用。本文还对铜（Ⅱ）。
The paper shows that the Cu2+. Pb2+ and Cd2+ .with I-, in HAc-NaAc buffer solution, can produce stable coordinate compounds which adsorbed on the surface of a mercury droping electrode and get the coordinate adsorption waves in high sensitivity. The peak potentials of oscilloplarographic waves ate - 0.52V. - 0.66V and - 0.82V respectively The linear. relationship between peak currents and the concentration of Cu2+.. Pb2+. and Cd2+. hold in the range of 1.6×10-,- 3.2×10-8. 0- 8.1×10-8 and 8.2×10-9- 5.0×10-8mol/L, respectively. The several factors affecting coordinate adsorption waves of Cu2+. Pb2+. and Cd2+. with I - were also discussed in details
出处
《哈尔滨师范大学自然科学学报》
CAS
1997年第1期77-81,共5页
Natural Science Journal of Harbin Normal University
