摘要
一种新的磷酸根离子敏感电极研究肖丹，俞汝勤，李军，袁孔铨（湖南大学化学化工系，长沙，４１００８２）关键词磷酸根，离子选择电极，磷酸二氢根磷酸根离子浓度的测定在化学化工、环境保护、生命科学和临床医学等领域有着重要的意义。对磷酸根离子敏感电极的研究和探索...
Near thirty years have passed since the first attempt to develop a selective electrode for phosphate and no substantial progress has been made because all reported electrodes have poor selectivity, reproducibility or short lifetime. In this report, we describe a phosphate ion sensitive electrode based on cobalt, which is easily available for practical application in determination of phosphate concentration. The detection limit of 8×10￣(-6)mol/L and a linear range of response from 1×10￣(-5)mol/L to 1×10￣(-2)mol/L for dihydrogen phosphate activity with a slope of 56mV/dec. are obtained in pH 4.0 buffer solutions. The electrode has an excellent selectivity for the dihydrogen phosphate with respect to many common anions such as sulfale,chloride,nitrate and acetate. The electrode shows a long term stability and reproducibility of response for the dihydrogen phosphate.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第2期193-194,共2页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
磷酸根
离子选择电极
磷酸二氢根
Phosphate, Ion selective electrode,Dihydrogen phosphate
