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Main Title XAD-2 Thermal Blank Determination.
Author Lochmueller, C. H. ; Jensen, Eric C. ;
CORP Author Duke Univ., Durham, NC. Paul M. Gross Chemical Lab.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Year Published 1981
Report Number EPA-R-805494-01; EPA-600/2-81-047 ; IERL-RTP-1091A
Stock Number PB81-172264
Additional Subjects Gas sampling ; Adsorbents ; Thermal stability ; Performance evaluation ; Styrene copolymers ; XAD-2 resins ; Volatile organic compounds ; Air pollution sampling
Library Call Number Additional Info Location Last
NTIS  PB81-172264 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 31p
Porous polymer adsorbents have proven to be effective for collection and preconcentration of organic materials in air streams. As part of the Environmental Protection Agency, Industrial Environmental Research Laboratory-RTP Level 1 Procedure (1) for environmental assessment, XAD-2 resin, a polystyrene-divinylbenzene porous polymer, is used in an adsorbent trap for the collection of volatile organic species. The purpose of this study was to examine the stability of XAD-2 resin, particularly its thermal stability under simulated use conditions. While the bulk thermal stability of the resin may be good, introduction of contaminants on the milligram scale can be sufficient to give a large blank value in relation to the total collected material. In the present study, the magnitude of the thermally-induced blank was assessed primarily by measurement of the Total Chromatographable Organic (TCO) fraction of the resin extract. In addition, a gas chromatography/mass spectroscopy (GC/MS) study of several of the extracts was carried out to identify the components of the blank.