各位: 实验数据范围问题, 按照红外测量的有关标准, ASTM E 1655 – 00 Standard Practices for Infrared Multivariate Quantitative Analysis1中规定:
10.1.1 Approximately 30 to 50 samples are collected covering the entire range for the constituent/property of interest. Care should be exercised to avoid intercorrelations among major constituents unless such intercorrelations always exist inthe materials being analyzed. The range in the concentration/ property should be preferably five times, but not less than three
times, the standard deviation of the reproducibility (reproducibility/2.77) of the reference analysis. 我现在测蛋白, 按照凯氏定氮要求: 试验室测量偏差10%, 按照测量平均值11.4%计算, 取样范围应该至少有三倍的偏差, 也就是说范围在3*11.4%*10%/2.77=1.2%,我现在实验室测量值最大为12.1%, 最小为10.5%, 应该符合这个三倍误差范围的要求, 不知道是否有误., 请高手指正.
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