DIN 38409-9:1980
德国检验水、废水和污泥的标准方法.第9部分:效果和物质的一般测量(H 组)、采用水和废水容量法对可沉淀物质的测定(H 9)
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of the settleable matter by volume in water and waste water (H9)