几种分解方法在光度法测定含钼矿样中钼的比较

考察了碱熔解法、酸溶解法和烧结法分解含钼矿样品的条件，结合硫氰酸钾分光光度法比较了钼的分析结果。结果表明：碱熔解法适用于钼含量I〉0．1％，铜、铁、钙、镁和氟等较高含量的样品的熔解；酸溶解法适用于钼含量〈0．1％，易溶且干扰元素较少的样品的溶解；烧结法适用于钼含量〈0．1％的含硅、铅等较高含量样品的分解。方法应用于钨矿石标准样品，地质矿、原矿、尾矿和铜精矿样品的分解及其钼的测定中结果满意。

Comparison of Several Decomposition Methods for Determination ofMolybdenum in Ore Sample by Spectrophotometric Method

The conditions of molybdenum containing ore sample＇s decomposition methods of alkali fusion, acid dissolution and sintering are investigated, the analysis results of different decomposition method by potassium thiocyanate spectrophotometry are compared. The results show that： alkali fusion method is suitable for the sample that the molybdenum content is ≥0. 1%, and copper, iron, calcium, magnesium and fluorin content is higher; acid solution method is suitable for the sample which is ease of solubility and has less interference element, and the molybdenum content is 〈 0. 1% ; sintering method is suitable for the sample of molybdenum content 〈 0. 1%, with higher content of silicon, lead and so on. The methods are suitable for the decomposition of the standard sample of tungsten ore, geology ore, raw ore, tailings and copper concentrate sample, as well as in the determination of molybdenum, and the results are satisfactory.