Here we present a simple yet effective gas chromatography-mass spectrometry(GC-MS)identification approach for the detection of heteroatom-containing compounds(HACCs)in petroleum fractions.The MS/AMDIS(Automated Mass S...Here we present a simple yet effective gas chromatography-mass spectrometry(GC-MS)identification approach for the detection of heteroatom-containing compounds(HACCs)in petroleum fractions.The MS/AMDIS(Automated Mass Spectral Deconvolution and Identification System)program was used to identify parts per million(ppm)HACC concentrations in petroleum fractions in place of traditional techniques(extraction and standard injection).Polycyclic aromatic sulfur heterocycles(S-PAHs)were used as model compounds to confirm the validity of the AMDIS identifiers,which were compared with extracted results using the off-line X-calibur software.AMDIS was able to identify ppm concentrations of S-PAHs in oil condensate.There was good agreement between experimental and AMDIS identification results for S-PAHs in oil condensate.AMDIS was also used to detect nitrogen-containing compounds(NCCs)and alkylphenols in oil condensate.Our results confirmed the presence of 2-methylbenzothiazole,carbazole,and 2,4-ditertbutyl phenol.In a crude oil sample,AMDIS identification of m/z=191 biomarkers wa s consistent with empirical results.Therefore,AMDIS can help to reduce the number of experimental steps in identification protocols.展开更多
目的:鉴定不同产地鱼露的挥发性物质。方法:采用顶空固相微萃取与气相色谱-质谱联用结合,对不同产地鱼露中的挥发性物质进行分析检测,结合相对保留指数、质谱自动解卷积系统对挥发性物质进行定性。结果:5种鱼露样品共有93种挥发性物质,...目的:鉴定不同产地鱼露的挥发性物质。方法:采用顶空固相微萃取与气相色谱-质谱联用结合,对不同产地鱼露中的挥发性物质进行分析检测,结合相对保留指数、质谱自动解卷积系统对挥发性物质进行定性。结果:5种鱼露样品共有93种挥发性物质,其中广东鱼露样品中酯类和芳香类挥发性物质的相对含量高,泰国鱼露样品中酮类挥发性物质的相对含量高,越南鱼露样品中酸类和杂环类挥发性物质的相对含量高,实验室自制鱼露样品中烃类、醛类和醇类挥发性物质相对含量高。五种鱼露不同个批号的样品经验证积分器(Assignment Validator and Integrator,GAVIN)自动峰对齐后,检出各自的独有组分35种,共有组分11种。共有组分被用于主成成分分析,不同产地的鱼露在主成分分析图上得到较好的分离。结论:提供了不同产地鱼露气味物质的特征,提供了一种利用气质联用的挥发物分析进行产品产地溯源的方法和工作流程。展开更多
文摘Here we present a simple yet effective gas chromatography-mass spectrometry(GC-MS)identification approach for the detection of heteroatom-containing compounds(HACCs)in petroleum fractions.The MS/AMDIS(Automated Mass Spectral Deconvolution and Identification System)program was used to identify parts per million(ppm)HACC concentrations in petroleum fractions in place of traditional techniques(extraction and standard injection).Polycyclic aromatic sulfur heterocycles(S-PAHs)were used as model compounds to confirm the validity of the AMDIS identifiers,which were compared with extracted results using the off-line X-calibur software.AMDIS was able to identify ppm concentrations of S-PAHs in oil condensate.There was good agreement between experimental and AMDIS identification results for S-PAHs in oil condensate.AMDIS was also used to detect nitrogen-containing compounds(NCCs)and alkylphenols in oil condensate.Our results confirmed the presence of 2-methylbenzothiazole,carbazole,and 2,4-ditertbutyl phenol.In a crude oil sample,AMDIS identification of m/z=191 biomarkers wa s consistent with empirical results.Therefore,AMDIS can help to reduce the number of experimental steps in identification protocols.
文摘目的:鉴定不同产地鱼露的挥发性物质。方法:采用顶空固相微萃取与气相色谱-质谱联用结合,对不同产地鱼露中的挥发性物质进行分析检测,结合相对保留指数、质谱自动解卷积系统对挥发性物质进行定性。结果:5种鱼露样品共有93种挥发性物质,其中广东鱼露样品中酯类和芳香类挥发性物质的相对含量高,泰国鱼露样品中酮类挥发性物质的相对含量高,越南鱼露样品中酸类和杂环类挥发性物质的相对含量高,实验室自制鱼露样品中烃类、醛类和醇类挥发性物质相对含量高。五种鱼露不同个批号的样品经验证积分器(Assignment Validator and Integrator,GAVIN)自动峰对齐后,检出各自的独有组分35种,共有组分11种。共有组分被用于主成成分分析,不同产地的鱼露在主成分分析图上得到较好的分离。结论:提供了不同产地鱼露气味物质的特征,提供了一种利用气质联用的挥发物分析进行产品产地溯源的方法和工作流程。
