摘要
发展了一种采用毛细管气相色谱柱切割 反吹技术分析汽油中芳烃的方法。利用强极性毛细管预柱将芳烃保留至n C10 的脂肪族化合物之后 ,并将其反吹到非极性毛细管柱中按沸点详细分离分析。该方法使预柱先流出的组分和分析柱流出的组分通过一个微型三通进入同一检测器中 ,因此可用归一化方法定量分析汽油中的芳烃。该方法可在 15min内完成汽油中苯至C10 芳烃的分析 ,结果的相对标准偏差 (RSD)≤ 3% ,切割误差为± 5s时分析结果的RSD≤ 4 %。
A simple and efficient method based on the technique of capillary column switching back flushing was developed for the detailed analysis of aromatic hydrocarbons in gasoline. The early eluting components from a pre column and the components of interest eluting from an analytical column are all directed to a flame ionization detector through a tee piece, which facilitates the quantitation of aromatic hydrocarbons in gasoline by normalization method. Real samples were analyzed and RSD≤3%. The operation is simple and easy, and the switching time window is ±5 s.
出处
《色谱》
CAS
CSCD
北大核心
2002年第3期207-209,共3页
Chinese Journal of Chromatography
关键词
反吹技术
分析
气相色谱
毛细管柱
柱切割
归一化
芳烃
汽油
gas chromatography
capillary column
column switching
normalization
aromatic hydrocarbon
gasoline