青海省察尔汗盐湖卤水中有效硒的测定

针对氯化物型卤水,用氯化镧作为共沉淀剂进行分离富集,在盐酸介质中,用氢化物发生-原子荧光光谱法测定卤水中的有效硒。结果表明,方法检出限为0.008μg/L,硒的含量在0~100μg/L范围内呈线性关系,标准加入回收率为97.5%~101.9%。方法准确可靠。

Determination of Available Selenium in Brine of Qarhan Salt Lake in Qinghai Province

For the chloride-type brine from the Charhan salt lake of Qinghai province, lanthanum chloride was used as co-precipitator in hydrochloride medium for separation and pre-concentration of available selenium in brine samples and available selenium was then determined by hydride generation-atomic fluorescence spectrometry. The detection limit of method is 0.008 μg/L for selenium with linear dynamic range of 0～100 μg/L and standard addition recovery of 97.5%～101.9%. The method has been applied to the determination of available selenium in chloride-type brine samples and has been proved to be accurate and reliable.