摘要
合成了LaB6和(La0.55Ba0.45)B6两种稀土材料,并用于制备了钢离子敏感电极.与(La0.55Ba0.45)B。铜离子敏感电极相比,LaB6铜离子敏感电极具有更好的选择性和较高的灵敏度.在水和pH=4的邻苯二甲酸氢钾缓冲溶液中,LaB6电极对铜离子的线性响应范围分别为10(-2)~6×10(-6)mol/L和10(-2)~7×10(-6)mol/L,响应斜率和检出限分别为105mV/pC,62mV/pC和2×10(-6)mol/L,4×10(-6)mol/LCu(2+).
In the present work,two rare-earth electrode materials of LaB6 and (La0.55Ba0.45)B6 have been synthesized,and used to fabricate copper ion sensitive electrode.The all solid-state LaB6 copper ion sensitive electrode is more sensitive and selective than the(L0.55Ba0.45)B6 copper ion electrode's.In water,the LaB6 electrode responds linearly to copper ion in the range of 10(-2)~6×10(-6)mol/L,with a slope of 105 mV/pC and detection limit of 2×10(-6) mol/L Cu(2+).In the pH 4.0 of phthalate buffer solution contaning 10(-2)~ 7×10(-6) mol/L Cu(2+), the electrode displaies linear response,with a slope of 62 mV/pC and detection limit of 4×10(-6) mol/L Cu(2+).The mechanism for the copper ion electrode has been also discussed.
出处
《广西师范大学学报(自然科学版)》
CAS
1994年第3期52-58,共7页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金
关键词
电极材料
铜离子
传感器
硼化镧
LaB6
rare-earth electrode material
copper ion sensor