红外吸收与非水滴定法测定硅酸盐岩石总碳的分析与比较

Analysis and Comparison of the Total Carbon Content in Silicate Rocks by Infrared Absorption Method and Nonaqueous Titration Method

为了准确测定岩石中总碳含量,以便进一步测定岩石中总有机碳、固定碳等重要参数。试验分别采用了高频燃烧-红外吸收法与管式炉燃烧-非水滴定法这两种方法,对硅酸盐岩石国家标准物质以及随机抽取样品进行连续测定,进行比较、条件试验。结果表明,两种方法都适用于测定一般硅酸盐岩石中总碳含量。其标准物质测试结果均不超过相对误差允许限,两法对某一随机样品的12次测试结果无离群值。

In order to accurately determine the total carbon content in rocks, so as to further determine the total organic carbon, fixed carbon and other important parameters of rocks, high-frequency combustion-infrared absorption and tube furnace combustion-non-water titration were applied. In this experiment. National standards of silicate rocks and samples taken at random were measured continuously. The results show that both methods are suitable for the determination of total carbon in general silicate rocks. And the test results of standard substances do not exceed the allowable limit of relative erro. Besides, there is no outlier in the 12 test applications of the two methods for a random sample.