最小样本量是什么意思？
证书上所述的数值是指一单位参考材料的平均分析物含量。所有参考材料（均匀溶液和气体除外）本质上都是不均匀的，但足够大的样品摄入量消除了这种不均匀性的影响。最小样品摄入量是仍然代表瓶子平均值的最小材料量。如果样本摄入量较少，则分析部分之间的差异会显著影响结果的可变性。因此，如果个别子样本小于证书上规定的最小样本量，生产商就无法保证这些子样本的认证值。
What does the minimum sample intake mean?
The value stated on the certificate refers to the average analyte content of one unit of a reference material. All reference materials (with the exception of homogeneous solutions and gases) are intrinsically heterogeneous but sufficiently large sample intakes eliminate the effect of this heterogeneity. The minimum sample intake is the minimum amount of material that is still representative for the average of the bottle. If the sample intake is less, differences between the analytical portions significantly influence the variability of the results. Therefore, producers cannot guarantee the certified value for individual subsamples if these subsamples are smaller than the minimum sample intake stated on the certificate.
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