摘要
应用毛细管气相色谱法测定二甲基二硫的纯度。采用的色谱柱为弹性石英毛细管柱30 m×0.32 mmi.d.,0.25μm,固定相为5%二苯基-95%二甲基聚硅氧烷。通过试验确定了柱温、进样口温度、柱头压和分流比。4批二甲基二硫纯度测定结果分别为99.82%、99.35%、99.14%、99.54%,相应的RSD%(n=20)分别为0.065%、0.066%、0.061%、0.075%。
The purity of dimethyl disulfide was determined by capillary gas chromatography. Fused-silica capillary column （30 m×0.32 mm i. d. ,0.25μm） and the stationary phase of 5% diphenyl -95% dimethyl polysiloxane were used. Colum temperature, injection port temperature, colum tip pressure and split ratio were determined on experimental design basis. Four groups of dimethyl disulfide were determined, the purities were 99.82% ,99.35% ,99. 14% ,99.54% respectively, and the RSD（n = 20） were 0. 0646% ,0.0663% ,0. 0610% ,0.0751% respectively.
出处
《化学分析计量》
CAS
2006年第2期21-23,共3页
Chemical Analysis And Meterage
关键词
毛细管气相色谱法
二甲基二硫
纯度
测定
capillary gas chromatography, dimethyl disulfide, purity, determination
