Jeong Taejun, Lee Hyo Kyoung, Jeong Dae-Cheol, Jeon Seungwon
Department of Chemistry, Institute of Basic Science, Chonnam National University, Gwangju 500-757, Korea.
Talanta. 2005 Jan 30;65(2):543-8. doi: 10.1016/j.talanta.2004.07.016.
PVC membrane electrodes for lead ion based on N,N'-bis(salicylidene)-2,6-pyridinediamine as membrane carrier were prepared. Among their membranes, a membrane electrode (m-3) containing o-NPOE as a plasticizer and 50mol% additive displays an excellent Nernstian response (29.4mV/decade) and the limit of detection of -loga (M) = 6.04 to Pb(2+) in Pb(NO(3))(2) solutions at room temperature. It has a rapid response time within 10s over the entire concentration range. The proposed electrode revealed good selectivity and response for Pb(2+) over a wide variety of other metal ions in a pH 5.0 buffer solutions, and good reproducibility of base line in subsequent measurements.
制备了基于N,N'-双（水杨醛）-2,6-吡啶二胺作为膜载体的铅离子PVC膜电极。在它们的膜中，含有邻硝基苯基辛醚作为增塑剂和50mol%添加剂的膜电极（m-3）在室温下对硝酸铅溶液中的Pb(2+)显示出优异的能斯特响应（29.4mV/十倍浓度变化），检测限为-loga(M)=6.04。在整个浓度范围内，其响应时间在10秒内。所提出的电极在pH 5.0缓冲溶液中对多种其他金属离子表现出对Pb(2+)的良好选择性和响应，并且在后续测量中基线具有良好的重现性。
