毛细管气相色谱测定二甲基二硫化物纯度的研究

Research on the Determination of Purity of Dimethyl disulfide by CGC-FID

研究了毛细管气相色谱测定二甲基二硫化物纯度的分析技术。选用BP5毛细管柱分离二甲基二硫化物样品 ,柱温线性程序升温 ,采用氢火焰离子化检测器检测 ,峰面积归一化法定量。直接 (闪蒸 )热针进样 0 .0 5 μL ,纯度在 90 %水平 ,分析数据相对标准偏差 (RSD) 0 .2 4% ,与生产厂分析数据相比较 ,约低 5 % ,表明两个分析试验方法存在显著性差异 ,原因是生产厂所采用的分析方法未将二甲基二硫化物主峰后一未知杂质峰分出来。样品单次分析时间 2 5min。

This method is based in the gas chromatographic separation achieved when a dimethyl disulfide sample is injected through a fused silica capillary column coated with BP5 (cross_linked 5% phenyl substituted methyl polysiloxane). The separated components are detected by a flame ionization detector and quantitated on an area percent basis.