分析系数(Coefficient ofAnalysis),简称CA,是新发展起来的一种统计方法。由于它计算简单,容易理解,并与目前广泛采用的统计方法又相关联,所以,我们把它应用到检验质量控制中,用来评价各实验室的分析结果的精密度和准确度。多年来,众所周知,分析结果的精密度,主要取决于偶然误差,常用标准差和变异系数来表示。它可以反映操作者的技术水平情况,一般来说,浓度高则精密度好,反 The coefficient of analysis (Coefficient of Analysis), referred to as CA, is a newly developed statistical method. Because it is computationally simple and easy to understand and correlates with the widely used statistical methods, we apply it to inspection quality control to evaluate the precision and accuracy of the laboratory’s analytical results. Over the years, it is well known that the precision of analytical results depends mainly on contingent errors, common standard deviations and coefficients of variation. It can reflect the operator’s technical level, in general, the high concentration of good precision, anti