ICP-AES法快速准确测定氧化铝铜中氧化铝含量

Determination of Alumina Content in Copper Alumina by ICP-AES

利用传统方法,如国标法测定氧化铝铜中氧化铝含量,但该法流程较长、操作要求较严格,难以满足日常快速准确测试的需求。通过对样品影响因素的系统分析,确立了最佳的样品溶解方法和最佳测定条件。结果表明:采用盐酸密闭恒温溶解样品,再采用ICP-AES法直接测定氧化铝铜样品中氧化铝含量的方法,在稀盐酸介质中,恒温190℃、腐蚀5 h的条件下,铜基体对氧化铝含量的测定无影响;本方法的加标回收率在96.9%-102.0%之间,相对标准偏差在0.35%-0.50%之间。说明,该方法能够满足快速准确测定氧化铜铝样品中氧化铝含量的需求。

Using traditional methods such as the national standard method to determine the alumina content in alumina copper has a long process and strict operation requirements,which is difficult to meet the daily quick and accurate testing requirements. In this paper,systematic investigations on the influential factors such as the sample pretreatment method,the analytical spectrum,the amount of hydrochloric acid and the copper solution system were carried out, and the optimal sample dissolution method and determination conditions were determined. Based on this,a closed constant temperature dissolution sample system with hydrochloric acid was established,and the alumina content in the alumina copper sample was determined by ICP-AES. The results show thatunder the selected conditions. In dilute hydrochloric acid,at constant temperature of 190 ℃ for 5 h,the copper solution system has no effect on the determination of alumina content. The recovery rate of this method is between 96. 9%-102. 0%, and the relative precision is between 0. 35%-0. 50%. Overall,the results indicate that the method is quick and precise and can satisfy the measurements of alumina contents in copper alumina.