DIN 38402-45:2014
水、废水和淤泥的德国标准检验法.一般信息(A组).第45部分:实验室间验证试验的比对(A45)
German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 45: Interlaboratory comparisons for proficiency testing of laboratories (A 45)