在滴定法中,正确控制等当点非常重要。用化学指示剂判断终点是一种方便、经济的方法,但不是在任何情况下都能令人满意;尤其在库仑滴定中,往往由于指示剂本身在电极上发生反应而影响测定结果。电化学传感器不但能方便准确地指示滴定终点,而且还可做灵敏度很高的直接定量测定,同时易于实现连续自 In the titration method, it is very important to properly control the equivalence point. Determining the end point with a chemical indicator is a convenient and economical method, but it is not satisfactory in all cases; especially in coulometric titration, the result of the measurement is often affected by the reaction of the indicator itself on the electrode. The electrochemical sensor can not only indicate the end point of the titration conveniently and accurately, but also can perform the direct quantitative determination with high sensitivity and is easy to realize the continuous