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Precautions for in-injection port thermal desorption-gas chromatography_mass spectrometry (TD-GC_MS) as applied to aerosol filter samples
Ho,SSH (Ho, Steven Sai Hang)[1,2,3]; Chow,JC (Chow, Judith C.)[1,2]; Watson,JG (Watson, John G.)[1,2]; Ng,LPT (Ng, Louisa Pan Ting)[3]; Kwok,Y (Kwok, Yuk)[3]; Ho,KF (Ho, K. F.)[1]; Cao,JJ (Cao, Junji)[1]
2011-03-30
Source PublicationATMOSPHERIC ENVIRONMENT
Volume45Issue:7Pages:1491-1496
Subtype期刊论文
Abstract

In-injection port thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) allows for analysis for > 130 non-polar organic compounds on small quartz-fiber filter samples without extraction chemicals. TD-GC/MS has been applied to samples from long-term U.S. networks since it is cost effective and less labor intensive. However, analysis of large numbers of samples results in sensitivity reductions over time. Instrument sensitivity and reproducibility were examined after 100, 200, and 500 sample analyses. Analyses of standards between batches of heavily loaded samples from China and Japan showed signal decreases of 28-78% for major organic classes. In the GC injection port, residues can accumulate on the gold-plated seal resulting in analyte adsorption as well as elevating signal background. Decreases in signal response were 28-43% for n-alkanes, 33-45% for hopanes and steranes, 28-56% for PAHs, and 38-78% for phthalates when the gold-plated seal was not replaced after 500 TD-GC/MS sample analyses. Limits of detection (LODs) also increased by 14-76% for the targeted non-polar organic compounds. Residues trapped in the capillary column head can cause peak broadening and overlap. The GC/MS system, including the injection port and gold seal, the column head (where the eluted sample is pre-concentrated), and the ion source should be cleaned after every batch of 50-100 samples. (C) 2010 Elsevier Ltd. All rights reserved.

KeywordThermal Desorption In-injection Port Gc/ms Non-polar Organic Pahs Alkanes Phthalates
DOI10.1016/j.atmosenv.2010.12.038
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10245
Collection粉尘与环境研究室
Corresponding AuthorHo,SSH (Ho, Steven Sai Hang)[1,2,3]
Affiliation1.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio Pathway, Reno, NV 89512, United States;
3.Hong Kong Premium Services and Research Laboratory, Chai Wan, Hong Kong, China
Recommended Citation
GB/T 7714
Ho,SSH ,Chow,JC ,Watson,JG ,et al. Precautions for in-injection port thermal desorption-gas chromatography_mass spectrometry (TD-GC_MS) as applied to aerosol filter samples[J]. ATMOSPHERIC ENVIRONMENT,2011,45(7):1491-1496.
APA Ho,SSH .,Chow,JC .,Watson,JG .,Ng,LPT .,Kwok,Y .,...&Cao,JJ .(2011).Precautions for in-injection port thermal desorption-gas chromatography_mass spectrometry (TD-GC_MS) as applied to aerosol filter samples.ATMOSPHERIC ENVIRONMENT,45(7),1491-1496.
MLA Ho,SSH ,et al."Precautions for in-injection port thermal desorption-gas chromatography_mass spectrometry (TD-GC_MS) as applied to aerosol filter samples".ATMOSPHERIC ENVIRONMENT 45.7(2011):1491-1496.
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