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CS-144型红外碳硫测定仪定硫时,均采用标样进行自动校准,由于标样的传递,必然带来分析误差,尤其测量低含量硫时误差较大,必须给予足够的重视。 目前使用的标样中含硫≤0.0009％的很少,为了解决低含量硫的标准问题,同时为完成上钢五厂一批GCr15一级标样(硫含量大约在0.0005%左右)和我厂GH302标样的定值任务,我们采用硫酸钾标准溶液作为基准进行自动校准,测得的数据与标准值基本一致,测定0.0008％硫的相对标准偏差(n=6)为4.67%。现将分析方法介绍如下:
CS-144 infrared carbon and sulfur detector set sulfur, are used standard automatic calibration, due to the standard sample transfer, will inevitably bring about the analysis of errors, especially when measuring low sulfur content greater error must be given enough attention. At present, there are few standards of ≤0.0009% sulfur in the standard samples. In order to solve the standard problem of low content of sulfur, in order to complete a batch of GCr15 primary standard (sulfur content is about 0.0005% GH302 standard calibration tasks, we use potassium sulfate standard solution as a benchmark for automatic calibration, measured data and the standard value is basically the same, the determination of 0.0008% relative standard deviation of sulfur (n = 6) was 4.67%. Now analysis methods are as follows: