Evaluation of an in-injection port thermal desorption-gas chromatography/mass spectrometry method for analysis of non-polar organic compounds in ambient aerosol samples
Evaluation of an in-injection port thermal desorption-gas chromatography/mass spectrometry method for analysis of non-polar organic compounds in ambient aerosol samples
复制标题
DOI：
10.1016/j.chroma.2008.05.056
复制
发表时间：
2008-07-25
影响因子：
4.1
通讯作者：
Schauer, James J.
中科院分区：
文献类型：
--
作者：
Ho, Steven Sai Hang;Yu, Jian Zhen;Schauer, James J.
热脱附与气相色谱/质谱联用（TD-GC/MS）是基于溶剂萃取（SE）的GC/MS（SE-GC/MS）的替代方法，用于分析过滤器或撞击器收集的气溶胶中的非极性有机化合物。TD-GC/MS没有样品预处理，需要少量过滤器来检测单个有机化合物。评价了进样口TD-GC/MS对标准品和环境空气样品中多环芳烃（PAHs）、正构烷烃、异/反异构烷烃、藿烷、甾烷、支链烷烃、环己烷、烯烃和邻苯二甲酸酯的检测性能。对132种有机化合物的重复分析表明，相对标准偏差<10%，大多数<5%。用NIST标准参考物质（SRM）1649 a城市灰尘测定的15种多环芳烃的准确度在认证值的5%以内。TD-GC/MS和SE-GC/MS方法比较，14个香港环境样品的106种非极性化合物的一致性在11%以内。对于19个铜梁，中国样品，23个多环芳烃的协议是在13%以内。(c)2008 Elsevier B. V.保留所有权利。
Thermal desorption coupled with gas chromatography/mass spectrometry (TD-GC/MS) is an alternative to solvent extraction (SE)-based GC/MS (SE-GC/MS) for the analysis of non-polar organic compounds in filter or impactor-collected aerosols. TD-GC/MS has no sample pretreatment and requires a small filter aliquot for detecting individual Organic compounds. The performance ofan in-injection port TD-GC/MS is evaluated for polycyclic aromatic hydrocarbons (PAHs), n-alkanes, iso-/anteiso-alkanes, hopanes, steranes, branched alkanes, cyclohexanes, alkenes, and phthalates in standards and ambient air samples. Replicate analysis for 132 organic compounds showed relative standard deviations < 10%, with the majority < 5%. Accuracy for 15 PAHs, determined with NIST standard reference material (SRM) 1649a urban dust, was within 5% of the certified values. TD-GC/MS and SE-GC/MS method comparisons for 14 Hong Kong ambient samples agreed within 11% for 106 non-polar compounds. For 19 Tong Liang, China samples, agreement was within 13% for 23 PAHs. (c) 2008 Elsevier B.V. All rights reserved.