伪极谱法测定锌在氟化物体系中形成配合物的稳定常数

The Determination of the Stabiloty Constant of the Complex for Zn￣(2+) in NaF System by the Method of the Pseudo-Polarogram

伪极谱法是阳极溶出伏安技术的一个新领域，是形态分析有效的方法之一．实验表明Ｚｎ在ＮａＦ体系中的伪极谱行为属于半可逆，在Ｚｎ￣（２＋）浓度为２×１０￣（－８）ｍｏｌ／ｌ、ｐＨ＝８．０的条件下，测得锌与氟形成配合物的组成为ＺｎＦ￣＋，配合物的稳定常数为２０．与文献值比较一致．

he method of the pseudo-polarogram is a new field of the anodic stripping voitammetrictechniques and one of the efficient methods for the speciation,The method of the pseudo-polaro-gram is described.The experimental results have showed that the behavior of the pseudo polaro-gram of Zinc in NaF system agrees with the theory of the pseudo-polarogram of a quasi-reversibleredox reaction. The composition and the stability constant of Zinc fluoride complex are ZnF￣+ and20 respectively for Zinc at concentration 2× 10￣(-8) mol/l,pH=8.0.The experimental results agreeswith literature data.