摘要
针对GC-MS定性定量分析沥青挥发性有机物的前处理方法进行了优化。一方面,对比考查了溶剂萃取(HS)、静态顶空(SE)、和固相微萃取(SPME)三种前处理技术在GS-MS分析沥青挥发性有机物组分中的差异性,结果显示固相微萃取技术在获取挥发性有机物种类和峰面积两方面均优于溶剂萃取和静态顶空方法;另一方面,对SPME-GC-MS方法进行了优化,考察了测试基质、样品质量、萃取时间、和萃取温度等的影响,得到优化的分析条件为:基质采用液体石蜡,样品质量1.0 g,萃取时间20 min,萃取温度120℃。方法学检验结果显示,此条件下SPME-GC-MS灵敏度高,重现性较好且准确可靠,可获得最为丰富的化合物种类数量信息。
The pretreatment method for qualitative and quantitative analysis of volatile organic compounds in asphalt by GC-MS was optimized.On the one hand,the differences of solvent extraction(HS),static headspace(SE)and solid-phase microextraction(SPME)in the analysis of volatile organic compounds in asphalt by GS-MS were comparatively investigated.The results showed that solid-phase microextraction technology was superior to solvent extraction and static headspace method in obtaining volatile organic compounds and peak area.On the other hand,the SPME-GC-MS method was optimized,and the effects of test matrix,sample quality,extraction time and extraction temperature were investigated.The optimized analysis conditions were obtained as follows:liquid paraffin was used as the matrix,sample quality was 1.0 g,extraction time was 20min,and extraction temperature was 120℃.The methodological test results show that under this condition,SPME-GC-MS has high sensitivity,good reproducibility,accuracy,and reliability,and can obtain the most abundant information on the types and quantities of compounds.
作者
梁智清
时敬涛
张南
童华
黄宏海
LIANG Zhiqing;SHI Jintao;ZHANG Nan;TONG Hua;HUANG Honghai(PetroChina Fuel Oil Company Limited Research Institute,Beijing 100195;Beijing University of Chemical Technology,Beijing 10029)
出处
《石油沥青》
2024年第1期16-25,共10页
Petroleum Asphalt
