DIN 38409-44-1992
德国检验水、废水和污泥的标准方法.说明作用和物质特性的参数(H组).在5至50Mg/L范围(H44)内测定化学需氧量(CSB)
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)