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高铼酸根离子选择电极国内外都有报道,活性材料采用四苯钟盐、季铵盐及亮绿等,线性下限一般为5×10~(-6)M,国产季铵盐三庚基十二烷基碘化铵已用于制备BF_4~-、TaF_6~-等电极,但尚未见制备ReO_4~-电极的报道。本文用此种季铵盐制成一种PVC膜ReO_4~-电极,线性下限为2×10~(-6)M。用于电位滴定法测定高铼酸钾产品中的铼,手续简便,相对标准偏差为0.2%。
Rhenium ion selective electrode has been reported both at home and abroad, the active material using tetracene bell salt, quaternary ammonium salt and bright green, the lower limit of the general is 5 × 10 ~ (-6) M, the domestic quaternary ammonium salt Dialkylammonium iodide has been used to prepare BF_4 ~ -, TaF_6 ~ - and other electrodes, but no report has been prepared ReO_4 ~ - electrode. In this paper, a quaternary ammonium salt was used to make a PVC membrane ReO_4 ~ - electrode with a linear lower limit of 2 × 10 ~ (-6) M. For potentiometric titration of rhenium in high-rhenium products, the procedure is simple and the relative standard deviation is 0.2%.