流动注射分析用新型钆离子电极  

Gadolinium Ion-selective Electrode and Its Application in Flow Injection Analysis

作　　者：吴金兰[1] 章咏华[1] 

机构地区：[1]中国科学院长春应用化学研究所电分析化学开放研究实验室,长春130022

出　　处：《分析化学》1992年第5期611-615,共5页Chinese Journal of Analytical Chemistry

摘　　要：功能高分子为活性材料,加热压片,制成新型钆电极。其性能较PVC式钆离子选择电极为优。取钆电极膜片制成流通式钆电极,与流动注射仪联用,测得电极斜率59mV,与静态响应相似。每次进样500μl,测定频率每小时60～100次。操作简单,重现性好。A new Gd electrode made by heat-pressed method with functional polymers as active material was developed. The electrode showed very short response time with a slop 60mV/pC. The selectivity, range of pH, internal resistance etc. of the electrode are superior to those of PVC membrane Gd-ion selective electrode. This Gd electrode has been successfully applied to the flow injction analysis with a determination frequency of 60～100 time/h, The linear range of the electrode is 1×10^(-2)～5×10^(-6)mol/L, the detection limit is 2.5×10^(-6)mol/L, and relative standard deviation is 1.5％.

关 键 词：流动注射分析 离子选择电极 钆 

分 类 号：O614.339[理学—无机化学]