Abstract

Diffuse reflectance spectroscopy was used to study the interaction of sodium diethyldithiocarbamate (DEDTC) with copper ions adsorbed on the disks of a PANF–KU-2 fibrous cation exchanger. The conditions for obtaining the substrate in the Cu-form are determined. The dependence of the analytical signal on the adsorption conditions of DEDTC was studied: the pH of the solution, the contact time of the solution with the substrate, the volume of the solution, and the concentration of DEDTC in the solution. Diffuse reflectance spectra of the PANF–KU-2–Cu substrate and the complex of DEDTC with Cu in the PANF–KU-2 phase were recorded. The best analytical signal was observed at 450 nm. A probability of the formation of Cu(DEDTC) and Cu(DEDTC)₂ complexes on the adsorbent surface depending on the concentration of DEDTC in the solution was noted. The PANF–KU-2–Cu substrate can be used for the adsorption and determination of 0.1–0.6 µg/mL of DEDTC in alkaline solutions (pH 7–10) by measuring the diffuse reflectance coefficient of disks at 450 nm. The procedure was tested on model solutions of tap water.

中文翻译：

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漫反射光谱法测定铜型纤维阳离子交换剂固相中的二乙基二硫代氨基甲酸酯

摘要

漫反射光谱法用于研究二乙基二硫代氨基甲酸钠（DEDTC）与吸附在PANF-KU-2纤维阳离子交换剂盘上的铜离子的相互作用。确定获得Cu形式的基板的条件。研究了分析信号对DEDTC吸附条件的依赖性：溶液的pH值，溶液与底物的接触时间，溶液的体积以及溶液中DEDTC的浓度。记录了PANF–KU-2–Cu底物的漫反射光谱以及PANF–KU-2相中DEDTC与Cu的络合物。在450 nm处观察到最佳分析信号。Cu（DEDTC）和Cu（DEDTC）₂形成的可能性注意到取决于溶液中DETTC的浓度，吸附剂表面上的络合物。通过在450 nm处测量圆盘的漫反射系数，可以将PANF–KU-2–Cu底物用于在碱性溶液（pH 7–10）中吸附和测定0.1–0.6 µg / mL的DEDTC。该程序在自来水的模型溶液上进行了测试。