络合滴定终点愈敏锐,滴定误差愈小。终点的敏锐度和滴定误差均与logK′MY CM、pMt-pMeq及Cln/CM成函数关系;但关系较复杂,不能以简单公式表示。对终点φ值进行选择,改进确定终点的手段和对终点误差进行校正,可以降低滴定误差,从而在终点不敏锐的情况下得到较准确的滴定结果。 Complexation titration end of the more acute, smaller titration error. The endpoint acuity and titration error are functionally related to logK’MY CM, pMt-pMeq, and Cln / CM; however, the relationship is complex and can not be expressed as a simple formula. Choosing the endpoint φ value, improving the means of determining the end point, and correcting for the end point error reduce the titration error, resulting in a more accurate titration result with less sharp endpoint.