离子选择电极测定氟离子方法的改进

对离子选择电极测定氟离子的方法进行了改进,即先测样品溶液的电位值,再在空白溶液中逐滴加入氟标准溶液,直至电位值与样品溶液电位值相同,由推导的计算式即可简便得出样品溶液的浓度,测定结果与一次标准加入法的测定结果相符;并简单介绍了氟离子选择电极法中pH值、缓冲溶液和电极斜率S对氟离子测定的影响。

Improvement of Ion Selective Electrode on Fluorine Ions Method

The ion selective electrode on fluorine ion method was improved, which is measuring the sample potential value first, then adding fluoride standard solution in the blank solution drop by drop until the potential value is as same as the sample. The concentration of the sample is the consumption volume multiplying the concentration of standard solution by the derivation of the calculation formula; the result is as same as the result of standard addition method. The influences of the value of pH, buffer solution and electrode slope on ion selective electrode are simply described in the paper.