每次试验所需材料数量？
所需材料的数量取决于所使用的分析方法。但它应该始终至少是证书上规定的最小样本量（否则不能保证均匀性）。
How much of the material do I need?
The amount of material needed depends on the analytical method used. But it should be always at least the minimum sample intake stated on the certificate (otherwise the homogeneity is not guaranteed).
专业供应欧盟BCR/IRMM/ERM，更多每次试验所需材料数量，请咨询客服！