ICP-OES快速测定卤水中K、Na、Ca、Mg、B、Li的含量

Rapid determination of K,Na,Ca,Mg,B and Li in brine by ICP-OES

开发了一种适合于ICP-OES快速测定卤水中K、Na、Ca、Mg、B、Li的含量分析方法,考察了ICP-OES光谱仪[1]主要的工作参数和工作条件,以及对谱线的影响,确定了检测范围,方法无需分离、简便、快速、准确。K、Na、Ca、Mg、B、Li检测方法的检测下限分别0.0057、0.012,0.0017,0.0066、0.0015、0.0084mg/L。方法的精密度(RSD,n=6)均小于2%,回收率为96.03%～107.6%。该方法与国标氯化钾GB6549—2011法[2]对比分析结果均在允许差范围之内。

The main working parameters and conditions of ICP-OES and the influences on spectral lines were studied,and the detection ranges were identified.The method was simple,fast,accurate and without sample separation.The detection thresholds for K,Na,Ca,Mg,B and Li were 0.0057,0.012,0.0017,0.0066,0.0015 and 0.0084 mg/L.The precision of the method(RSD,N =6)was below 2 %,and the recoveries were in the range of 96.03%—107.6%.The difference between this method and the GB6549—2011 method was within the permissible range.