处理比较电势法反常现象的理论根据

THEORETICAL BASIS FOR TREATING ABNORMAL PHENOMENA OF THE POTENTIOMETRIC-COMPARISON-METHOD

当应用比较电势法测定含钠量低微的陶瓷原料试样时，可能出现一种反常现象，即参比溶液的电势一开始就高于试液的电势。对此著者建议，可用氧化钢的最低可检限提出分析报告。本工作根据离子选择电极的选择性理论，推导出了计算最低可检限的公式，并实验测定了用以求算最低可检限的钠电极的选择性系数。

The Potential of reference salution is initially higher than potential of test salution, this abnormal phenomena are probably occured when amount of sodium is very few in the ceramic samples analyzed by the potentiometric - Com-parison- Method. It is therefore recommended that the report of analytic result may be given with the Detectable Rape(D. R-.) of Na2O. Based on the selectivity theory of ISE, the calculating fomula of D. R. has been derived.The selectivity coeffencints of sodium electrode by which the D. R. is calculated have been determined by experiment.