电感耦合等离子体原子发射光谱法测定矿石中的钼钨

国家标准方法使用强碱熔融—分光光度法分别测定钨和钼,样品前处理复杂,成本高。实验采用盐酸-硝酸-氢氟酸-高氯酸溶液分解试样,草酸-盐酸溶液浸出钨,电感耦合等离子体原子发射光谱法同时测定钨、钼。该方法测定结果与标准值的相对偏差≤4.55%,相对标准偏差1.15%~7.89%,准确度和精密度良好,且方法简单,适用于矿石中钨、钼的批量测定。

Determination of tungsten and molybdenum in ores by inductively coupled plasma atomic emission spectrometry

The pretreatment of sample is complicated and the cost is high if national standard method,strong base fusion-spectrophotometry,is used to determine tungsten and molybdenum.So hydrochloric acid-nitric acid-hydrofluoric acid-perchloric acid solution is used to decompose samples,and then oxalic acid-hydrochloric acid solution is used to leach tungsten,tungsten and molybdenum are simultaneously determined by inductively coupled plasma atomic emission spectrometry.The relative deviation of the results between the determination method and reference value is ≤4.55 %,the relative standard deviation is 1.15 %-7.89 %,and the accuracy and precision are good.The method is simple and applicable for batch determination of tungsten and molybdenum in ores.