摘要
利用合成的新型硫氮氧杂大环化合物为载体制备了ＰＶＣ膜汞（Ⅱ）修饰电极．该电极对汞（Ⅱ）的线性响应范围为８×１０－６～６×１０－３ｍｏｌ·ｌ－１，对大多数金属离子的选择性系数小于１×１０－３．还研究了修饰电极的各种性能，讨论了修饰电极的响应机理，并将修饰电极应用于直接电位法和电位滴定法的测定中．
The PVC membrane mercury-modified electrode is prepared using an O,N,S-donor macrocycle which was systhesized lately.The electrode gives a linear response within the concentration range of 8 × 10-6-6×10-3mol·L-1 of Hg(Ⅱ).The selectiveity coefficients of the electrode are less than 1 × 10-3 for most other metal ions.The are response mechanism and characteristics are studied.The electrode has been used successfully in potentiometric titration and direct potentiometry.
基金
国家自然科学基金
