SPME-GC-MS法分析聚筛蕊挥发性化学成分
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篇名: SPME-GC-MS法分析聚筛蕊挥发性化学成分
TITLE:
摘要: 目的:采用固相微萃取-气相色谱-质谱联用法分析聚筛蕊挥发性化学成分。方法:色谱条件:色谱柱为ZB-5 MSI 5%苯-95%二甲基聚硅氧烷弹性石英毛细管柱,程序升温[以5 ℃/min升温至220 ℃(保持2 min)],检测器为氢火焰离子化检测器,载气为高纯氦(纯度:99.999%),柱流速为1.0 ml/min,汽化室温度为250 ℃,不分流进样。质谱条件:离子源为电子电离源,电离电压为70 eV,接口温度为280 ℃,离子源温度为230 ℃,四极杆温度为150 ℃,发射电流为34.6 μA,倍增器电压为1 502 V,溶剂延迟时间为1.5 min,质量范围为30~500 amu。结果:从聚筛蕊中共分离、鉴定出19种挥发性化学成分,主要为烯烃和醛、醇、酮、呋喃等含氧挥发性化学成分,相对百分含量占总离子流图中所有色谱峰的63.55%,其中含量较高的是2,4-辛二烯(29.66%)、己醛(5.93%)、3-甲基-1,4-庚二烯(5.45%)、呋喃(4.65%)。结论:该研究基本明确了聚筛蕊主要挥发性化学成分,为进一步认识聚筛蕊提供了一定科学依据。
ABSTRACT: OBJECTIVE: To analyze the volatile components of Cladia aggregate by SPME-GC-MS. METHODS: The column was ZB-5 MSI 5% benzene-95% dimethylpolysiloxane fused silica capillary column, programmed temperature was heated from 5 ℃/min to 220 ℃ (maintaining 2 min), detector was flame ionization detector, carrier gas was high purity He (99.999%), the column flow rate was 1.0 ml/min, vaporization room temperature was 250 ℃, splitless injection. MS conditions: ion source was electron ionization source, ionizing voltage was 70 eV,  interface temperature was 280 ℃, ion source temperature was 230 ℃, quadrupole temperature was 150 ℃, emission current was 34.6 μA, multiplier voltage was 1 502 V, solvent delay time was 1.5 min, and quality range was 30-500 amu. RESULTS: 19 volatile chemical components were separated and identified from C. aggregate, mainly olefins an aldehydes, alcohols, ketones, furans oxygenated volatile chemical components, relative contents accounted for 63.55% to all chromatographic peaks in total ion chromatogram, in which, 2,4-octadiene (29.66%), hexanal (5.93%), 3-methyl-1,4-heptadiene (5.45%) and furan (4.65%) showed the highest contents. CONCLUSIONS: The study has basically made clear the main volatile components in C. aggregate, which provide certain scientific basis for further exploring C. aggregate.
期刊: 2016年第27卷第27期
作者: 赵超,韩国营,李红梅,周欣
AUTHORS: ZHAO Chao,HAN Guoying,LI Hongmei,ZHOU Xin
关键字: 聚筛蕊;地衣;固相微萃取;气相色谱-质谱联用法
KEYWORDS: Cladia aggregate; Lichens; SPME; GC-MS
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