标准摘要
[中文适用范围]: 即使通过减小工作范围,也并不总是能够用直线曲线准确地描述一组校准点之间的关系。 代替线性回归分析,应用二阶多项式的最小二乘拟合(参见 ISO 8466-1:1990l1] 4.1.3 中的线性测试)。 使用这种拟合,不仅可以计算校准函数,还可以计算与其相关的置信区间。 ISO 8466 的这一部分主要用于方法开发,不一定适用于所有常规分析。 [外文原描述]: It is not always possible to accurately describe the relationship between a set of calibration points with a rectilinear curve, even by decreasing the working range. Instead of the linear regression analysis, a least-squares fit to a second-order polynomial is applied (see test for linearity in 4.1.3 of ISO 8466-1:1990[1]). Using this fit, it is possible to calculate not only the calibration function but also the confidence interval associated with it. This part of ISO 8466 is intended primarily for use in method development and may not necessarily be applicable to all routine analyses.
英文名称Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 2: Calibration strategy for non-linear second-order calibration functions