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Main Title Integrity of VOA-Vial seals
Author Schumacher, Brian A. ; Minnich, M. M. ; Zimmerman, J. H. ; Blasdell, J.
Other Authors
Author Title of a Work
Minnich, Martha M.
Zimmerman, John H.
Blasdell, J.
CORP Author Lockheed Martin Technology Services Group, Las Vegas, NV. Environmental Services.;Environmental Protection Agency, Las Vegas, NV. National Exposure Research Lab.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, Characterization and Monitoring Branch,
Year Published 2000
Report Number EPA/600/R-00/066; EPA-68-C5-0091; NERL/LV-00-138; PB2001101547
Stock Number PB2001-101547
OCLC Number 45107790
Additional Subjects Leak test ; Inspection ; Organic compounds ; Containers ; Seals(Stoppers) ; Volatile matter ; Sampling ; Soil remediation ; Degradation ; Inhibition ; Transparency ; United States ; Glass ; Glass industry ; Quality control ; Security seals ; Defects ; Aluminum alloys ; Vacuum ; Concentrations(Chemistry) ; Storage ; Reliability ; VOA(Volatile Organic Analysis)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJDD  EPA/600/R-00/066 Env Science Center Library/Ft Meade,MD 02/09/2001
NTIS  PB2001-101547 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation Various pagings ; 28 cm.
Preservation of soil samples for the analysis of volatile organic compounds (VOCs) requires both the inhibition of VOC degradation and the restriction of vapor movement in or out of the sample container. Clear, 40, -ml glass VOA vials manufactured by the four major U.S. glass manufacturers were tested for seal integrity. Visual inspection revealed a various of imperfections ranging from small indentations, bumps, and scratches on vial threads or lips, through obvious defects, such as large indentations or grooves in the vial lips and chipped or broken glass. The aluminum plate vacuum test proved to be unreliable in identifying potentially leaky vials. The septa-seal vacuum test was conducted twice on the 80 selected vials. Results show that mean VOC concentrations after 14 days storage generally were within +-20% of the known concentration with a majority of the concentrations within +-15% of their known values. Only 1 vial lost VOCs and that was due to a large chip in the vial's lip and neck. These findings indicate that the silicone septa are flexible enough to overcome most vial imperfections and form a complete seal against VOC loss.
"EPA/600/R-00/066." Issued September, 2000. "Contract Number 68-C5-0091."