火焰发射光谱法测定氯化物型湖卤水中钾和钠

Determination of Potassium and Sodium in Chloride Lake Brines by Flame Atomic Emission Spectrometry

氯化物型湖卤水中一般呈现高钠低钾的分布状态，实验配制了合理的钾钠分布比例的标准系列，原水样不需特殊处理，通过逐级稀释，采用最高标准调节能量，火焰发射光谱法直接测定湖卤水中的钾和钠，在标准曲线上查得被测离子的质量，然后换算成钾和钠的含量。方法用于氯化物型湖卤水中钾和钠的测定，回收率为91％～116％，精密度（RSD，n=7）小于1％。

The chloride lake brine generally has a higher concentration of sodium than potassium. The original sample was diluted step by step without any pre-treatment. A reasonable ratio of sodium to potassium standard solution series was prepared and the contents of potassium and sodium were directly determinated by atomic emission spectrometry under the optimized measurement condition. This method has been applied to the determination of sodium and potassium in chloride lake brine and the recovery was from 91% to 116% with the precision of less than 1%RSD（n =7）.