合金炉渣及焊剂中氟化钙的测定,我们过去是用碳酸盐熔融分解,以氟氯化铅沉淀分离,容量法测定此法虽然准确,但费时多,难以满足急样和大批样品的分析要求。为此,我们采用了热分解法分离氟,以硝酸钍滴定法测定氟,试验结果证明,此法重现性好,准确度高,速度快,分析一个样品只需25分钟。热解分离法由 Warf 等提出,后经 Powell 等改进,Stanlly 等证明方法有效。我们参照 Powell 的改进方法进行了试验。 Determination of calcium and magnesium alloy slag and flux, we used to melt carbonate decomposition, precipitation of lead chlorofluoride separation, volumetric determination of this method although accurate, but more time-consuming, difficult to meet the urgent and large sample analysis Claim. To this end, we use the thermal decomposition of fluorine separation, thorium nitrate titration determination of fluorine, the test results show that this method reproducibility, high accuracy, high speed, a sample analysis of just 25 minutes. Pyrolysis separation method proposed by Warf et al., After Powell and other improvements, Stanlly and other methods to prove effective. We refer to Powell’s improved method of testing.