A high resolution GC-analysis method for determination of C2-C10 hydrocarbons in air samples
A high resolution GC-analysis method for determination of C2-C10 hydrocarbons in air samples
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测定空气样品中 C2-C10 碳氢化合物的高分辨率 GC 分析方法
DOI：
10.1002/jhrc.1240091007
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
W. Seiler
中科院分区：
文献类型：
--
作者：
P. Matuška;M. Koval;W. Seiler
建立了毛细管柱上程序升温-压力气相色谱法测定空气中非甲烷总烃的分析方法。C2-C10烃类的分离是在一个单一的GC运行中使用熔融石英毛细管柱（FSCC）与化学键合的非极性固定相（CP-Sil-5-CB）。柱上低温聚焦和GC回注的组合提供了低于环境初始温度（−40°C）的C2烃的基线分离。在浸入液氮中的柱头上进行低温聚焦。只有当沿着冷却塔段产生温度梯度时，才能实现所有C2-C10烃的定量保留。通过移除冷却剂，在没有补充加热的情况下，从柱头部洗脱聚焦的组分。为了消除基质效应，富集程序被设计为去除CO2和H2O。检测限为2.0 × 10−12 g丙烷。
An analytical method for the determination of non-methane hydrocarbons (NMHC) in air was developed using simultaneously pressure and temperature programmed gas chromatography (GC) on a capillary column. The separation of C2-C10 hydrocarbons was performed in a single GC-run using a fused silica capillary column (FSCC) with a chemically bonded non-polar stationary phase (CP-Sil-5-CB). A combination of on-column cryofocusing and GC reinjection provided baseline separation of C2 hydrocarbons at subambient initial temperature (−40°C). The cryofocusing was performed on the column head immersed in liquid nitrogen. Quantitative retention of all C2-C10 hydrocarbons was achieved only when a temperature gradient is created along the cooled column section. The focused components are eluted from the column head without supplementary heating by removing the coolant. To eliminate matrix effects, the enrichment procedure was designed to remove CO2 and H2O. The detection limit was found to be 2.0 × 10−12 g propane.