新型全固态铁离子敏感电极研究

A New Type of All Solid-state Electrod for Fe(Ⅲ)Ion

采用稀土电极材料六硼化镧制备了一种新的全固态铁离子敏感电极。研究了该敏感电极在常见介质中对Ｆｅ３＋的响应行为。结果表明，该铁离子敏感电极在１．５ｍｏｌ／ＬＨ３ＰＯ４介质中的线性响应范围、检测下限和响应斜率分别为１．０×１０－５～１．０×１０－１ｍｏｌ／ＬＦｅ３＋，６．０×１０－６ｍｏｌ／ＬＦｅ３＋和６０ｍＶ／ｐＣ，且具有较好的选择性。

A new all Solid-state electrode for Fe(Ⅲ) ion has been fabricated with rare-earth material LaB6 prepared by us. The electrode response behaviour toward Fe(Ⅲ) in several medium was investigated. The results show that the linear tesponse range, detection limit and response slope of the Fe(Ⅲ) ion sensitive electrode in 1. 5 mol/L H3PO4 medium are 10-5～10-1 mol/L, 6×10-6 mol/L Fe3+ and 60 mV/pC rerspectively, and with good selectivity.