测定棕刚玉中氧化铝含量的影响因素

摘要

基于EDTA容量法测定棕刚玉中氧化铝含量，设计了控制试验的条件，探讨了影响试验结果的因素并分析其原因。结果表明：采用返滴定EDTA容量法测定氧化铝含量时，正确控制操作过程中试样熔融时间及试液pH值、反应时间和指示剂用量等因素，可提高分析结果的准确度和可信度。%Based on the EDTA volumetric method for test of aluminum oxide in brown fused alumina, the conditions to control experiment were designed. The influence factors of the test results were discussed and their causes were analyzed. The results show that the fusing time of samples, the pH value and reaction time of test solution and the amount of indicator are controlled properly in test for alumina oxide content with back titration of EDTA volumetric method, which can improve the accuracy and reliability of analytical results.