设计了一种用于快速气相色谱(Fast gas chromatography,FGC)的新型控制系统。该控制器主要由色谱柱温度控制系统、自动进样及气路压力控制系统组成。其温度控制范围为30~160 ℃,升温速度约为3 ℃/s,温度控制精度为±0.5 ℃,载气压力控制范围为0~0.5 MPa。将本控制器应用于自制快速色谱,并用色谱对由直链正构烷烃(C1~C8)以及甲苯9种物质组成的标准样品进行测试。结果显示,色谱能在100 s内将此9种物质完全分开。
Abstract
A new control system was designed for fast gas chromatography(FGC) in this paper.The controller is mainly composed of the column temperature control system,automatic sampling and pressure control system of the gas path.The range of temperature control is from 30 to 160 ℃,the heating rate approximates 3 ℃/s,the temperature control accuracy is about ± 0.5 ℃,and the carrier gas pressure control range is from 0 to 0.5 MPa.Applying the controller in homemade FGC,a standard sample composed of straight-chain n-alkanes(C1-C8) and toluene was tested by the FGC.The result indicated that the 9 species could be completely separated in 100 s.
关键词
快速色谱程序升温控制系统
Keywords
fast gas chromatographytemperature programmingcontrol system