毛细管气相色谱法对液化石油气组分的测定  

Determination of Composition of Liquefied Petroleum Gas by Capillary Gas Chromatography

作　　者：王楼明[1] 方红[1] 叶锐钧[1] 杨俊凡[1] 陈国峰[1] 陈惊波[1] 

机构地区：[1]深圳出入境检验检疫局,广东深圳518067

出　　处：《分析测试学报》2009年第11期1335-1339,共5页Journal of Instrumental Analysis

基　　金：国家认证认可监督委员会资助行业标准项目(2005B046)

摘　　要：选用30m×0．53mm（i．d．）HPPLOT／Al2O3石英毛细管柱，程序升温和分流进样技术对液化石油气的18种C1～C5烃类组分进行分离。选择水浴加阀箱气化方式，并以80℃为气化温度优化了进样口温度等色潜参数。液化石油气各组分在一定浓度范围内其浓度与响应值有良好的线性关系，相关系数r为0．9940～0．9988。各组分实际样品的检出限为0．001％～0．002％（摩尔分数）。18 C 1 -C5 carbohydrate composition in liquefied petroleum gas（LPG） was separated by 30 m ×0. 53 mm（i. d. ） HP PLOT/Al2O3 capillary column with temperature programming and split injection. The vaporizing processes with waterbath and valve system was used, and 80 ℃ was selecting as the vaporizing temperature of LPG. The chromatographic parameters such as injection inlet temperature of GC were optimized. Under the optimal conditions, the calibration curves showed good linearity for the certain concentration of LPG compositions with correlation coefficients in the range of 0. 994 0 -0. 998 8. The detection limit of the LPG compositions was between 0. 001% and 0. 002% （ molar fraction）.

关 键 词：液化石油气 毛细管气相色谱 C1~C5 烃类组分 

分 类 号：O657.71[理学—分析化学] O657.8[理学—化学]