German standard methods for the examination of water, waste water and sludge; parameters characterizing effects and substances (group H); determination of the chemical oxygen demand (COD), ranging from 5 to 50 mg/l (H 44)
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);化学需氧量(COD)的测定 范围为5至50 mg/l(H 44)