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J Chromatogr A

Title:		Concentrically packed high flow air sampler for parts-per-trillion volatile and semi-volatile organica compounds
Author(s):		Xie X; Dennis Tolley H; Lee ML;
Address:		"Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, United States. Department of Statistics, Brigham Young University, Provo, UT 84602, United States. Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, United States. Electronic address: milton_lee@byu.edu"
Journal Title:		J Chromatogr A
Year:		2017
Volume:		20170426
Issue:
Page Number:		1 - 7
DOI:		10.1016/j.chroma.2017.04.020
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"Rapid determination of trace level (parts-per-trillion) volatile organic compounds cannot always be achieved with conventional analytical techniques. In this study, a device was developed to sample a large volume of air in a short time period. The basic design involves packing sorbent layers concentrically around an empty permeable tube. Single digit parts-per-trillion detection limits were reached in less than 25min with this sampling system using gas chromatography-mass spectrometry for analysis. The concentric packed trap can sample at high flow rates (>10L/min) because it has a large sampling surface cross-section and short combined sorbent bed. Additionally, the large sorbent amount (>1g) provides large breakthrough volume (>100L) required to achieve low detection limits. The trapped analytes were thermally desorbed and transferred into a needle trap device for final analysis. This high flow sampling system was explored for detection of low ppt benzene, toluene, ethylbenzene and xylenes (BTEX) in air"
Keywords:		"Air Pollutants/analysis Benzene/analysis Benzene Derivatives Chemistry Techniques, Analytical/*instrumentation/*methods Gas Chromatography-Mass Spectrometry Toluene/analysis Volatile Organic Compounds/*analysis Xylenes/analysis Air sampling Btex Concentri;"
Notes:		"MedlineXie, Xiaofeng Dennis Tolley, H Lee, Milton L eng Netherlands 2017/05/01 J Chromatogr A. 2017 Jun 16; 1502:1-7. doi: 10.1016/j.chroma.2017.04.020. Epub 2017 Apr 26"