离子选择电极多数根据直接电位法或不同滴定剂下指示滴淀终点,作专有主离子(Primary ion)的测定,但由于主离子的选择性显示不出十分有力,不同条件下往往存在某些离子的干扰,而且电极种类又少,应用常受限制。事物却有它的两面性,因此利用不利的这一面,可作某些离子的间接测定。另外由于离子间的反应范围广阔,不同的化学反应可作不同的应用;即使反应完全不属于平衡反应,亦可以利用不同反应速率或某离子的催化作用进行动力学法测定。近年来离子选择电极新应用不断发展,有直接有间接,促 Ion selective electrode mostly based on the direct potential method or different titration point under the instructions of the end of the dropping point, as a proprietary primary ion (Primary ion) determination, but due to the selectivity of the main ion is not very powerful under different conditions often exist some Ion interference, but also less kinds of electrodes, the application is often limited. Things have its two sides, so the use of the negative side, for some indirect determination of ions. In addition, due to the wide range of reaction between the ions, different chemical reactions can be used for different applications; even if the reaction does not belong to the equilibrium reaction, kinetic method can also be used to determine the catalytic effect of different reaction rates or ions. In recent years, new applications of ion selective electrodes continue to develop, there are direct and indirect