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重铬酸钾容量法测定煤中腐植酸的方法已列入煤炭、石油部标准,含碳比数值是决定该法正确度的关键,一直以来人们认为它就是腐植酸的碳含量。本文就它的实质进行研究,即容量法究竟是否仅将腐植酸中碳元素氧化而不涉及其他元素?含碳比的正确数值应如何确定呢? 选取22种纯有机试剂按测定腐植酸的方法测其碳含量(即计算时不用含碳比),为简化起见,任意列出其中7种试剂于表1。由表可见容量法碳含量与理论碳含量并非总是相同的,此处提出“当量碳含
The method of potassium dichromate volumetric method for determination of humic acid in coal has been included in the standards of coal and oil ministry. The value of carbon ratio is the key to determining the correctness of the method. It has been thought that it is the carbon content of humic acid. In this paper, the essence of its research, that is, whether the volumetric method is only the carbon in humic acid oxidation without involving other elements? The correct value of the carbon content should be how to determine? Select 22 kinds of pure organic reagents according to the determination of humic acid To determine its carbon content (that is, without the calculation of carbon content ratio), for the sake of simplification, arbitrarily list seven kinds of reagents in Table 1. It can be seen from the table that the carbon content of the capacity method is not always the same as the theoretical carbon content, and "equivalent carbon content