水质五日生化需氧量（ＢＯＤ５）的测定，目前均采用ＧＢ７４８８８７〔１〕规定的方法，即把稀释后的水样置入密闭容器（溶解氧瓶）中，于２０℃恒温放置５天，测定初始时的溶解氧量和５天后的溶解氧量，从而计算出５天期间的耗氧量并根据稀释倍数求得ＢＯＤ５值。１Ｂ... Water quality on the 5th biochemical oxygen demand (BOD5) determination, are used GB7488  87 [1] provides that the method of dilution of the water sample into a sealed container (dissolved oxygen bottle), placed at a constant temperature of 20 ℃ 5 Day, the amount of dissolved oxygen at the initial stage and the amount of dissolved oxygen after 5 days were measured to calculate the oxygen consumption during 5 days and the BOD5 value was obtained from the dilution factor. 1B ...