由于五硫化二磷在农药杀虫剂、矿物浮选剂、润滑油添加剂等制造方面的广泛采用。因此测定工业五硫化二磷含量,对质量评价,就显得非常重要。目前国内外虽然报导了一些方法,然而十分理想的方法还无定论。造成这种情况的主要原因,是工业五硫化二磷中成份比较复杂所致,文献指出除主成份 P_4S_(10)外,尚含有游离的 S、P、P_4S_9,配比不当时也会出现 P_4S_3、P_4S_5、P_4S_6、P_4S_7,受氧化还能形成P_4O_6S_4。正因为如此,目前评价五硫化二磷质量,也只能是从外观、熔点鉴别,也有应用 Phosphorus pentasulfide is widely used in the manufacture of pesticide insecticides, mineral flotation agents, lubricant additives and the like. Therefore, the determination of phosphorus pentasulfide content of the industry, the quality evaluation, it is very important. At present, although some methods have been reported both at home and abroad, the very ideal method is inconclusive. The main reason for this situation is caused by the complex composition of phosphorus pentasulfide in industry. The literature indicates that besides the main component P_4S_ (10), it contains free S, P and P_4S_9, and P_4S_3 and P_4S_5 also appear when the ratio is not suitable. P_4S_6, P_4S_7, by oxidation can form P_4O_6S_4. Because of this, the current evaluation of phosphorus pentasulfide quality, only from the appearance, melting point identification, there are applications