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在文献[1]工作的基础上,我们发现TlCl_4~-络阴离子与丁基罗丹明B在盐酸介质中形成红色缔合物沉淀,易溶于有机溶剂成膜。本文采用光谱纯碳棒经成型抛光后直接在表面浸涂活性物质PVC膜,制得一种性能优良的新型Tl(Ⅲ)电极。电极在2.5×10~(-3)—6.3×10~(-7)MTlCl_4~-范围内呈Nernst响应,级差53±1mV(18℃),检测限3.54×10~(-7)M,动态响应时间小于
Based on the work in [1], we found that TlCl_4 ~ - complex anion and butyl rhodamine B form a precipitate of red complex in hydrochloric acid medium, which is easily dissolved in organic solvent to form a film. In this paper, the pure carbon rod of the spectrum is directly polished on the surface of the active material PVC film by molding and polishing to prepare a novel Tl (III) electrode with excellent performance. The electrode showed a Nernst response in the range of 2.5 × 10 -3 -6.3 × 10 -7 MTlCl 4 - with a level difference of 53 ± 1 mV (18 ° C) and a detection limit of 3.54 × 10 -7 M, Response time is less than