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J Chromatogr A

Title:		Development of analysis of volatile polyfluorinated alkyl substances in indoor air using thermal desorption-gas chromatography-mass spectrometry
Author(s):		Wu Y; Chang VW;
Address:		"School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore. wu0009ng@e.ntu.edu.sg"
Journal Title:		J Chromatogr A
Year:		2012
Volume:		20120323
Issue:
Page Number:		114 - 120
DOI:		10.1016/j.chroma.2012.03.053
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"The study attempts to utilize thermal desorption (TD) coupled with gas chromatography-mass spectrometry (GC-MS) for determination of indoor airborne volatile polyfluorinated alkyl substances (PFASs), including four fluorinated alcohols (FTOHs), two fluorooctane sulfonamides (FOSAs), and two fluorooctane sulfonamidoethanols (FOSEs). Standard stainless steel tubes of Tenax/Carbograph 1 TD were employed for low-volume sampling and exhibited minimal breakthrough of target analytes in sample collection. The method recoveries were in the range of 88-119% for FTOHs, 86-138% for FOSAs, exhibiting significant improvement compared with other existing air sampling methods. However, the widely reported high method recoveries of FOSEs were also observed (139-210%), which was probably due to the structural differences between FOSEs and internal standards. Method detection limit, repeatability, linearity, and accuracy were reported as well. The approach has been successfully applied to routine quantification of targeted PFASs in indoor environment of Singapore. The significantly shorter sampling time enabled the observation of variations of concentrations of targeted PFASs within different periods of a day, with higher concentration levels at night while ventilation systems were shut off. This indicated the existence of indoor sources and the importance of building ventilation and air conditioning system"
Keywords:		"Air/*analysis Air Pollution, Indoor/*analysis Fluorocarbons/*analysis Gas Chromatography-Mass Spectrometry/*methods Limit of Detection Reproducibility of Results Volatile Organic Compounds/*analysis;"
Notes:		"MedlineWu, Yaoxing Chang, Victor W-C eng Netherlands 2012/04/13 J Chromatogr A. 2012 May 18; 1238:114-20. doi: 10.1016/j.chroma.2012.03.053. Epub 2012 Mar 23"