摘要
对Fe3＋有超能斯特响应的碳糊电极（试剂石墨粉与液体石腊油混合）作指示电极，在pH＝2．0的盐酸溶液中，用EDTA电位滴定或示波电位滴定Fe3＋。碳糊电极对Fe3＋的电位响应斜率为110mV／decade，检测限5×10-8mol／L，可用EDTA准确滴定2×10－5mol／LFe3＋溶液。本方法简便、准确、灵敏度高。
A carbon paste electrode with super-Nernstian response is used as an indicator electrode to determine Fe(Ⅲ ) by potentiometric titration and oscillographic-potentiometric titration with EDTA in the soIution of hydrochloride at pH= 2. 0. The response slope of carbon paste electrode to Fe(Ⅲ ) is 110 mV/decade, the detection limit is 5× 10-8 mol/L. Thesolution of 2. 0× 10-5 mol/L Fe3+ can be accurately titrated with EDTA. This method is simple, accurate and highly sensitive.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1996年第5期595-598,共4页
Chinese Journal of Analytical Chemistry
关键词
电位滴定
碳糊电极
铁离子
示波电位法
Oscillographic-potentiometric titration, potentiometric titration,carbon paste electrode, iron(Ⅲ )
