摘要
研究了同时测定氢氧化镁中铝(Al)、钙(Ca)、铁(Fe)、砷(As)、钾(K)、铅(Pb)及硅(Si)元素含量。建立了以标准加入法消除基体干扰,采用电感耦合等离子体原子发射光谱法(ICP-AES)仪测定溶液中待测元素的方法,选定的各元素分析光谱曲线为As189.0、Al394.4、Ca393.3、Fe259.9、K766.4、Pb283.3、Si251.6,电感耦合等离子体原子发射光谱仪设置参数为RF功率1350 W;等离子气流量15.0L/min;雾化器气流量0.75L/min;辅助气流量1.0L/min;泵速75r/min。试验结果证明,加标回收率为95.8%~109.5%,相对标准偏差小于5.7%,7种元素检测限在0.000014%~0.0044%之间,该方法解决了企业对大批量氢氧化镁产品快速分析铝、钙、铁等7种杂质元素含量的检测需求。
The simultaneous determination of Al、Ca、Fe、As、K、Pb、Si in Mg(OH)_(2) was studied.The method using ICP-AES instrument measuring the concentration of impure elements that the matrix interference can be eliminated by standard addition was established.The spectral curve of each element was selected for As189.0,Al394.4,Ca393.3,Fe259.9,K766.4,Pb283.3,Si251.6.The parameters of ICP-AES instrument was the power 1350 W,the plasma gas flow rate 15L/min,auxiliary gas flow rate 1L/min and the pump speed 75r/min.The results show that the determination of the Sample recovery is 95.8%~109.5%.The relative standard deviations were lower than 5.70%,and the detection limits of these traces impure elements were in the range of 0.000014%to 0.0044%.The method solved the test requirements of rapid analysis of impure elements in the large quantities of magnesium hydroxide samples of the finished product in enterprises.
作者
师靖
SHI Jing(Qinghai Salt Lake Haina Chemical Co.Ltd,Xining 811600,China)
出处
《世界有色金属》
2023年第8期132-134,共3页
World Nonferrous Metals
