固相微萃取-气相色谱-质谱法分析烟用浸膏挥发性成分

采用固相微萃取 -气相色谱 -质谱 ( SPME-GC/MS)法定性分析了烟用浸膏 -茉莉花浸膏的挥发性和半挥发性成分。探讨了不同萃取头、不同温度平衡样品及采样时间对分析检测结果的影响。结果表明 :5 0 /3 0μm DVB/Carboxen/PDMS纤维头于 65℃温度下采样 1 .0 h,可获得较满意的结果 ;共鉴定出 61种成分 ,占挥发和半挥发性成分总量的 89.79%。其中酯类化合物 ( 2 2种 )为主要成分 ,是香料的原料来源 ,占总的相对含量的 48.0 8% ;烯类 ( 1 9种 )为 1 7.95 % ;醇类 ( 1 3种 )为 2 3 .0 9%。乙酸苯甲酯 ( 1 4.5 2 % )、顺 -苯甲酸 -3 -己烯-1 -酯 ( 1 4.1 1 % )、芳樟醇 ( 1 3 .1 6% )和α-金合欢烯 ( 1 2 .66% )是相对含量最多的成分。此方法适用于对样品简便、快速地定性分析

Analysis of Volatile Components in Concrete by Solid Phase Microextraction Gas Chromatography-Mass Spectrometry

The volatile and semi-volatile components of concrete were analyzed by solid phase microextraction gas chromatography-mass spectrometry (SPME-GC/MS).The optimum sampling conditions were investigated including different SPME fibers, equilibrium temperatures and sampling time. The 50/30μm DVB/Carboxen/PDMS fiber showed higher sampling sensitivity at the temperature of 65℃. The sixty-one components were detected, accounting for 89.79% of the total content of the volatile and semi-volatile components. Among them, the content of the twenty-two ester components account for 48.08% as the main source of flavor, the nineteen alkene components for 17.95%, and the thirteen alcoholic components for 23.09%. The relative content of the components including acetic acid, phenyl-methyl ester(14.52%), 3-hexen-1-ol, benzoate(14.11%), 3,7-dimethyl-1,6-octadien-3-ol(13.16%)and α-farnezene(12.66%)is the next. The results suggested that SPME-GC/MS is suitable to analyze concrete rapidly and qualitatively.