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本文研究了碲的电位溶出分析。在0.25MHCl介质中加入Cu(Ⅱ),利用碲与铜生成Cu-Te化合物富集到玻碳电极上,以溴水做氧化剂测定碲,测定下限可达2ppb(富集10分钟)。用砷共沉淀分离碲,测定了烟尘、硫酸厂污泥及粮食中碲的含量。实验部分仪器:由ZD-2型自动电位滴定仪,XWC-100F型记录仪组成。XBD-1型旋转玻碳电极为工作电极,Pt及SCE为辅助及参比电极。富集和测量均在搅拌下进行。
This paper studies the tellurium potential dissolution analysis. Cu (Ⅱ) was added into 0.25M HCl medium, and Cu-Te compound was generated from tellurium and copper to enrich the glassy carbon electrode. The content of tellurium was determined by using bromine water as oxidant. The determination limit was up to 2 ppb (10 min enrichment). The arsenic coprecipitation was used to separate tellurium, and the contents of tellurium, smelter sludge and tellurium in grain were measured. Experimental equipment: ZD-2-type automatic potentiometric titrator, XWC-100F-type recorder. XBD-1 rotating glassy carbon electrode is working electrode, Pt and SCE are auxiliary and reference electrode. Enrichment and measurement are carried out with stirring.