陰イオン交換樹脂を用いるテルル(IV)イオン選択性電極の作製とその工業材料分析への適用

概要

論文の詳細を見る
The preparation and application of a coated-graphite tellurium(IV) ion-selective electrode, based on the TeCl_6^<2-> form anion-exchange resin fixed in a poly(vinyl chloride) matrix, are described. The effects of the hydrochloric acid concentration and interference ions were investigated. The electrode showed a near-Nernstian slope of 30 ± 2 mV/decade over a tellurium(W) ion concentration range of 3 × 10^<-4> - 10^<-2> mol dm^<-3> and a response time of 30 s in 6 mol dm^<-3> hydrochloric acid solution. Na^+, K^+ and Ca^<2+> do not interfere, but other ions, such as Bi^<3+>, Cd^<2+>, Fe^<3+>, Ga^<3+>, Sb^<3+>, ClO_4^-, PO_4^<3-> and SO_4^<2->, cause interference. The electrode has been successfully used to determine tellurium in Bi_2Te_3 and CdTe after the separation of tellurium from bismuth or cadmium by the hydroxide precipitation method in the presence of EDTA as a masking reagent for bismuth and cadmium.
社団法人日本分析化学会の論文
2000-10-05