前言水中有机物质的含量是评价水质的一个重要指标,常以总有机碳(TOC)表示之。其测定方法已有很多报导。本文介绍一种新的分析流程:先使水中有机物在镍催化剂上直接裂解加氢成甲烷,用氢火焰离子化检测器测定水样中总碳(有机碳与无机碳之和)。然后将水样通过150℃载有磷酸的石英毛层,使碳酸盐分解为二氧化碳,并在镍催化剂上还原为甲烷,按上法测定无机碳,由二者之差得出总有机碳。 Introduction The content of organic matter in water is an important indicator of water quality and is often expressed as total organic carbon (TOC). The measurement method has been reported in many cases. This article describes a new analysis process: the organic matter in water is firstly directly cracked and hydrogenated to methane on the nickel catalyst, and the total carbon (the sum of organic carbon and inorganic carbon) in the water sample is measured by a hydrogen flame ionization detector. The water sample was then passed through a quartz wool layer containing phosphoric acid at 150 ° C to decompose the carbonate into carbon dioxide and reduce it to methane over a nickel catalyst. The inorganic carbon was determined by the above method and the total organic carbon was obtained from the difference between the two.