重晶石在工业上有广泛用途。一般以测定 BaSO_4含量来表明它的纯度。由于重晶石中常含有少量CaSO_4和 SrSO_4,Ba、Sr、Ca 同属ⅡA 族元素,化学性质极为近似,用经典的重量法分析纯度,分离较困难,特别是含锶、铅高的矿物,易因分离不彻底而使 BaSO_4的结果偏高,因此,如果要同时测定钡、锶、钙,分离和测定手续十分烦杂,而且费时。也有人用 EDTA 容量法测定 BaO、SrO,实践证明很难保证分析结果的准确度。本文采用原子吸收法,在同一份 Barite is widely used in industry. The general determination of BaSO 4 content to indicate its purity. Because barite often contains small amounts of CaSO 4 and SrSO 4, Ba, Sr and Ca belong to group IIA, their chemical properties are very similar. It is more difficult to separate them by classical gravimetric methods, especially those containing strontium and lead. Insufficient separation results in high BaSO 4 results. Therefore, it is time-consuming to separate and measure barium, strontium and calcium simultaneously. Some people use EDTA volumetric method to measure BaO, SrO, it is proved that it is difficult to ensure the accuracy of the analytical results. In this paper, atomic absorption method, in the same copy