二甲基二硫醚 (CH3SSCH3,DMDS)是重要的有机化工原料。由于其硫含量高、容易分解、毒性较低 ,在石油炼制工业中 ,用作石脑油、汽油、煤油、柴油和常压重油的加氢脱硫、加氢处理和加氢裂化等过程催化剂的硫化剂。DMDS还是制取甲基磺酸的重要原料。
滕州市浩瀚色谱仪器技术服务有限公司，与时俱进，以科学发展为指导，在王晓莹经理的带领下，依托翔鹰分析技术研究所，分析与测试ZX，色谱工程研究所，3个科研单位，研发出毛细管气相色谱仪测定二甲基二硫化物纯度，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。Dimethyl disulfide (CH3SSCH3, DMDS) is an important organic chemical raw materials. Because of its high sulfur content, easy decomposition, low toxicity, in the oil refining industry, used as naphtha, gasoline, kerosene, diesel and atmospheric oil heavy hydrodesulfurization, hydrotreating and hydrocracking process catalyst Vulcanizing agent. DMDS is also an important raw material for the preparation of methanesulfonic acid.
Tengzhou City, the vast chromatographic equipment Technology Co., Ltd., advancing with the times, under the guidance of scientific development, under the leadership of Wang Xiaoying manager, relying on Xiangying Analysis Technology Research Institute, analysis and testing center, chromatography engineering research institute, three scientific research units The purity of dimethyl disulfide was determined by capillary gas chromatography. The analytical technique of determination of dimethyl disulfide by capillary gas chromatography was studied. The samples were separated by BP5 capillary column, and the linear temperature of the column was raised. The hydrogen flame ionization detector was used to detect the peak area normalization method. The relative standard deviation (RSD) of the analytical data was 0.42%, which was about 5% lower than that of the plant analysis data, There was a significant difference in the analytical method, since the analytical method used in the production plant did not separate the unknown impurity peaks of the main peak of the dimethyl disulfide. Sample single analysis time 2 5 min.
