硅酸盐中钾和钠的离子电极法测定

Determation the Contents of Potassium and Sodium in Silicate Materials with ISE

本文提出用ISE测定硅酸盐中钾钠含量的方法。导出了应用于本方法计算含钠量的公式。以盐酸三乙醇胺为总离子强度调节剂,在pH=9.5时,用一次标准加入法测定钾。于同一份试液中,用比较电位法测定钠。为消除钾的干扰,需制备同试液含有等钾量的参比溶液。

This article has developed a procedure of determing the contents of potassium and sodium in silicate materials with ISE, and deduced an equation for calculating sodium content. With HCI-triethanolamine as the TISAB, at PH=9,5 the potassium is determined by single standard addition method. In the same aliquot solution, the sodium is determined by comparing electric potential. To eliminate interference from the potassium, the reference solution with equal amounts of potassium as in the test solution is prepared.