DIN 38402-30-1998
德国对水.废水和淤泥的统一检验方法.总则(A组).第30部分:非均质水试样预处理、调匀和等分
German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 30: Pretreatment, homogenization and aliquotation of non-homogeneous water samples (A 30)