Abstract：Determining the content of valuable metal ions in rare earth extracts, which has important directive significance in recycling of valuable metals and improving the quality of products. In this article, fusing the rare earth extractive recovery with sodium peroxide & sodium carbonate mixed solvent, and leaching by hot water, there is soluble carbonate sediment of Calcium, barium and strontium (witch could dissolved in hydrochloric acid). Dissolving the sediment by hydrochloric acid, using sulfuric acid to form Calcium, barium and strontium a stable sulfate sediment. Then measuring the rate of Calcium, barium and strontium by gravimetric method. According to the experimental method, parallel determination (11 times) of the valuable metal in rare earth extractive recovery, proceeding with standard recovery test by adding standard solution. The results showed that, it is fast and effective to determine the rate of Calcium, barium and strontium in rare earth extracts by gravimetric method. The RSD of determined results is <0.3%, the recovery rate is 99.9%-101%。
2021, Vol. 28 