建立了电感耦合等离子体发射光谱法( ICP - AES)同时测定碳酸盐型、硫酸盐型、氯化物型三种类型卤水中Li、Na、K、Ca、Mg、B、S、Cl等高低含量元素的分析方法.选择仪器最佳的工作条件为射频功率1400W,炬管位置位于-3,载气流量0.60 L/min.确定了各元素测定谱线,使用ICP - AES的双向观测模式、轴向观测模式测定Li、Ca、B、S、Cl以及低含量的K、Mg,径向观测模式测定高含量的Na、K、Mg,可确保卤水中不同含量的元素同时检出.Li、Na、K、Ca、Mg、B、S的检测下限为0.07 ～ 3.00 mg/L,Cl的测定下限为165mg/L.方法精密度(RSD,n=10)均小于5％,回收率为92.4％ ～ 109.7％.其中Na、K、Mg、S、Cl测定结果与传统方法测定结果基本吻合.%As reported in this paper, lithium, sodium, potassium, calcium, magnesium, boron, sulfur and chlorine in brine were determined by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). Test conditions were optimized, such as the RF power of 1400 W, the torch tube position of -3 and the carrier gas flow rate of 0.60 L/min. The correct analytic lines were selected. According to the ICP-AES in two-way observation mode, low contents of Mg, K, Ca, S, Cl, B and Li were determined by using axial observation and high content of Na, K and Mg were determined with radial observation, which ensured the simultaneous determination of multi-elements in brine. Detection limits of Li, Na, K, Ca, Mg, B and S were 0.07 -3.00 mg/L, and the detection limit of Cl was 165 mg/L. The results indicated that the relative standard deviation for all elements was less than 5% in the accuracy test. The recoveries of standard addition were between 92. 4% and 109. 7% in this method. The determination results of Na, K, Mg, S and Cl were in good agreement with the results of traditional methods.
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