DIN 38409-7
德国水、废水和污泥检验标准方法 表征效应和物质的参数(H 组) 第7部分:酸和碱中和能力的测定(H 7)
German standard methods for the examination of water, waste water and sludge - Parameters characterizing effects and substances (group H) - Part 7: Determination of acid and base-neutralizing capacities (H 7)