二维毛细管柱气相色谱法测定大气中的挥发性烃类  

Determination of Volatile Hydrocarbon in Atmosphere by Two-Dimensional Capillary Column Gas Chromatography

作　　者：王木林[1] 程红兵[1] 孟昭阳[1] 丁国安[1] 

机构地区：[1]中国气象科学研究院,北京100081

出　　处：《色谱》2002年第2期172-177,共6页Chinese Journal of Chromatography

基　　金：国家自然科学基金重大项目 ( 4 93992 70 )

摘　　要：用二维毛细管柱气相色谱法测定了大气中的挥发性烃类 (VHCs)C3 ～C10 共 5 7种化合物。采用吸附 /两级热解吸预富集样品。采用双柱 (PLOT柱 :5 0m× 0 32mmi d × 8μm ,Al2 O3 /Na2 SO4 ;HP 1柱 :5 0m× 0 2 2mmi d × 0 5 μm ,methylsilicone) /双FID系统进行样品分析。方法的定性稳定性好 ,峰面积的相对标准偏差小于 2 0 % ,用外标法定量 ,线性相关系数r2 分别为 0 9990和 0 9997。分析周期为 48min。通过对江苏常熟生态站 182个农田大气样品中VHCs的含量测定 ,表明方法准确 ,快速 ,可取得满意的结果。Fifty-seven volatile hydrocarbons(VHCs) (C_3-C_ 10 ) in the atmosphere have been determined by two-dimensional capillary column gas chromatography. The samples were preconcentrated using adsorption/two stages of thermal desorption. The samples were analysed by dual columns (PLOT, 50 m×0.32 mm i.d.×8 μm, Al_2O_3/Na_2SO_4; HP-1, 50 m×0.22 mm i.d.×0.5 μm, methyl silicone)/dual flame ionization detectors(FID). The qualitative stability of the method is good. The relative standard deviation of the peak area response is smaller than 20%. The correlation coefficients( r 2) for linear regression equations for PLOT and HP-1 columns were 0.999?0 and 0.999?7 respectively. Analytical period was 48 min. The 182 atmospheric samples from the Ecological Station of Changshu, Jiangsu were measured. The results show that the method is accurate, rapid and practically useful for the determination of the VHCs in atmosphere.

关 键 词：二维毛细管柱气相色谱法 热解吸 挥发性烃类 大气 污染物 测定 

分 类 号：X132[环境科学与工程—环境科学] X831.02