自制碘离子选择性电极及磷石膏中碘的测定  

Preparation of iodide ion-selective electrode and its application on the detection of iodine content of phosphorous gypsum

作　　者：叶志海[1] 肖丹[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《化学传感器》2006年第1期64-67,共4页Chemical Sensors

摘　　要：研制了以碘化银和硫化银混合晶体压片作为敏感膜的碘离子选择性电极。该电极对I-具有优良的响应性能,在浓度测定范围内呈现近能斯特响应,响应范围达1.0×10-1～2.0×10-8mol/L,斜率为-54.6mV/dec。对磷酸生产过程中大量产生的磷石膏废渣中碘的含量分析进行了研究,取得了满意的结果。A home - made iodide ion - selective electrode based on mixed crystal tablet of silver iodide and silver sulfide as sensitive membrane is described, which displays a preferential potentiometric response to iodide. The electrode exhibits near Nemstian potential response with the range of 1.0×10^-1-2.0×10^-8mol/L and a slope of - 54.6 mV/dec. The electrode can be applied to iodide analysis of phosphorous gypsum produced in the phosphorous acid manufacture process, and the result is satisfied.

关 键 词：碘离子选择性电极 磷石膏 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]