电感耦合等离子体发射光谱法快速测定磷化液中锌、镍、锰元素含量

Rapid Determination of Zn,Ni and Mn in Phosphate Solution by Inductively Coupled Plasma Optical Emission Spectrometry

建立了利用电感耦合等离子体发射光谱(ICP-OES)同时快速测定磷化液中锌、镍、锰元素的方法.采用体积分数为1%的硝酸直接稀释现场磷化槽液上清液,选择锌206.200nm、镍231.604nm、锰257.610nm作为分析谱线,使用标准曲线法定量.结果表明:标准曲线线性良好,各元素校准曲线相关系数均在0.9995以上,方法的检出限分别为锌0.003μg/mL,镍0.003μg/mL,锰0.006μg/mL,相对标准偏差(RSD,n=12)均小于5%,加标回收率在92.4%~110.8%之间.试验测定结果与原子吸收火焰法测定结果基本一致,方法具有较好的准确度和精密度,可以满足日常快速检测要求.

A method for the simultaneous determination of Zn, Ni and Mn in phosphate solution by the inductively coupled plasma optical emission spectrometry (ICP-OES) was set up. The supernatant of the on-site phosphate was directly diluted with HNO 3 of a volume fraction of 1%. Zn 206.200 nm, Ni 231.604 nm, and Mn 257.61 nm were selected as the analytical lines, and quantified by the standard curve method. The experimental results showed that the standard curve was linear and all the linear correlation coefficients of the calibration curves were over 0.999 5,The detection limits of the method were 0.003 μg/mL for Zn, 0.003 μg/mL for Ni and 0.006 μg/mL for Mn. The relative standard deviation ( RSD, n =12) was less than 5%, the recoveries of the method were 92.4%~110.8%.The experimental results of this method were basically consistent with those of the atomic absorption method. The set-up the method is of good accuracy and precision, and can meet the requirements for the daily rapid detection.