【摘要】 研究气相色谱(GC)/质谱(MS)法测定硫化胶中的游离硫含量。结果表明:硫化胶丙酮抽提液中的单体硫与三苯基膦反应生成稳定的硫代三苯基膦,通过GC/MS法检测硫代三苯基膦,可以推算出未知样品的游离硫含量;与传统的亚硫酸钠法、铜螺旋法和液相色谱法相比,GC/MS法测定硫化胶中的游离硫含量灵敏度较高,准确性较好,操作简单。更多还原

【Abstract】 In this paper,the content of free sulfur in vulcanized rubber was analyzed by gas chromatography(GC)/mass spectrometry(MS). This method was based on the reaction that the free sulfur in the acetone extracted solution from the vulcanized rubber reacted with triphenylphosphine to form stable triphenylphosphine sulfide. Firstly,triphenylphosphine sulfide was analyzed by GC/MS,and then the sulfur content of the unknown sample could be calculated according to the peak area using the standard curve. Compared with the traditional sodium sulfite method,copper spiral method and liquid chromatography,GC/MS method showed better sensitivity,higher accuracy and simpler operation for determination of free sulfur content in vulcanized rubber.更多还原