饱和漆酚冠醚PVC膜铅(Ⅱ)离子选择电极的研究

Lead(Ⅱ) ionselective PVC membrane electrode based on saturated urushiol crown ether

以３′正十五烷基苯并１５冠５为中性载体，制备了ＰＶＣ膜铅离子选择电极，并对电极的性能进行了测试．结果表明，电极的能斯特响应斜率为２８ｍＶ，检测下限为２×１０６ｍｏｌ／Ｌ，线性范围为３×１０６～５×１０２ｍｏｌ／Ｌ，对大多数离子的选择性系数为１０４～１０２．

Lead(Ⅱ) ionselective PVC membrane electrode based on 3′npentadecy1benzo15crown5 was prepared and its electrode behavior was evaluated. The electrode exhibited a linear response to the lead(Ⅱ) ion in the concentration range of 3×10 -6 ～5×10 -2 mol/L with slope of 28 mV per decade and with a detection limit of 2×10 -6 mol/L. Selectivity coefficients of most positive ions were within 10 -2 ～10 -4 .