双臂套索冠醚PVC膜碘离子选择电极  

Iodide Ion Selective PVC Membrane Electrodes Based on Bibrachial Lariat Crown Ethers

作　　者：宋化灿[1] 颜振宁[2] 周稚仙[2] 吴养洁[2] 

机构地区：[1]中山大学化学系,广州广东510275 [2]郑州大学化学系,郑州河南450052

出　　处：《分析测试学报》2002年第3期1-3,共3页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目 (29872034)

摘　　要：研究了两种新型双臂套索冠醚1,10_二(5_氯_8_羟基喹啉_7_亚甲基)_1,10_二氮杂_4,7,16_三氧杂_13,19_二硫杂环二十一烷 (Ⅰ )和1,13_二(5_甲基_8_羟基喹啉_7_亚甲基)_1,13_二氮杂_4,7,10_三氧杂_16,19_二硫杂环二十一烷 (Ⅱ )为载体的PVC膜电极的响应行为 ;实验结果表明 ,两电极均显示阴离子响应 ,其中对碘离子具有优良的能斯特电位响应性能 ,线性范围为10-5～10-1 mol/L ,斜率分别为 -59.1mV/pcI- 和 -57.6mV/pcI- ;电极具有读数稳定 ,重复性好 ,pH值范围宽等优点 ;将该电极用于药品中碘含量的测定 。The response behaviours of two ion selective PVC membrane electrodes were investigated prepared by novel bibrachial lariat crown ethers of 1,10 _ bis(5 _ chloro _ 8 _ hydroxyquinolin _ 7 _ methylene) _ 1,10 _ diaza _ 4,7,16_ trioxa _ 13,19 _ dithiacycloheneicosane(Ⅰ) and 1,13 _ bis _ (5 _ methyl _ 8 _ hydroxyquinolin _ 7 _ methylene _ 1,13 _ diaza_ 4,7,10 _ trioxa _ 16,19 _ dithiacycloheneicosane(Ⅱ) as carriers. The experimental results show that the electrodes exhibit anion response mechanism and have a good Nernstian response for iodide ion. The linear response range of both electrodes is 10-5～10-1 mol/L, and corresponding slope is -59.1 mV/for electrode(Ⅰ) and -57.6 mV/ for electrode(Ⅱ). The two electrodes have advantages of stability, repeatability and wider pH range. The two electrodes were used for the determination of iodine in meglucamine diatrizoate injection, the results are in good agreement with those obtained by the method in pharmacopoeia.

关 键 词：PVC膜 双臂套索冠醚 离子选择电极 碘离子 药品 碘含量测定 

分 类 号：O613.44[理学—无机化学] R927.2[理学—化学]