Işıldak I, Asan A, Andaç M
Ondokuz Mayis University, Faculty of Education, Department of Chemistry, 55100 Samsun, Turkey.
Talanta. 1999 Jan;48(1):219-24. doi: 10.1016/s0039-9140(98)00241-0.
A simple spectrophotometric flow-injection method is reported for the highly sensitive and fast determination of copper(II). The method is based on the formation of coloured Cu(II)-(4-methylpiperidinedithiocarbamate)(2) complex when the copper solutions are introduced into a tertiary reagent stream containing 4-methylpiperidinedithiocarbamate. The coloured complex is then selectively monitored at 435 nm. To increase interactions between copper(II) and colour forming reagent and preconcentrate of copper(II), a microcolumn containing strong cation exchange resins was placed between injection manifold and spectrophotometer. The system required no mixing chamber and allowed a sample throughput >60 sample h(-1). The calibration graph was linear in the range 5-100 mug l(-1). The detection limit was <0.5 mug l(-1) for 20 mul injection volume of copper(II) ion solution. The developed method was applied to environmental, copper processing water, and ore samples.
报道了一种用于高灵敏度快速测定铜（II）的简单分光光度流动注射法。该方法基于将铜溶液引入含有4-甲基哌啶二硫代碳酸盐的第三试剂流中时形成有色的铜（II）-（4-甲基哌啶二硫代碳酸盐）（2）络合物。然后在435nm处选择性监测有色络合物。为了增加铜（II）与显色剂之间的相互作用并预富集铜（II），在进样歧管和分光光度计之间放置了一个装有强阳离子交换树脂的微柱。该系统无需混合室，样品通量>60个样品/小时（-1）。校准曲线在5-100μg l（-1）范围内呈线性。对于20μl进样体积的铜（II）离子溶液，检测限<0.5μg l（-1）。所开发的方法应用于环境、铜加工用水和矿石样品。
