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Collection and analysis of NASA clean room air samplesThe environment of the HALOE assembly clean room at NASA Langley Research Center is analyzed to determine the background levels of airborne organic compounds. Sampling is accomplished by pumping the clean room air through absorbing cartridges. For volatile organics, cartridges are thermally desorbed and then analyzed by gas chromatography and mass spectrometry, compounds are identified by searching the EPA/NIH data base using an interactive operator INCOS computer search algorithm. For semivolatile organics, cartridges are solvent entracted and concentrated extracts are analyzed by gas chromatography-electron capture detection, compound identification is made by matching gas chromatogram retention times with known standards. The detection limits for the semivolatile organics are; 0.89 ng cu m for dioctylphlhalate (DOP) and 1.6 ng cu m for polychlorinated biphenyls (PCB). The detection limit for volatile organics ranges from 1 to 50 parts per trillion. Only trace quantities of organics are detected, the DOP levels do not exceed 2.5 ng cu m and the PCB levels do not exceed 454 ng cu m.
Document ID
19860005888
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Sheldon, L. S. (Research Triangle Inst. Research Triangle Park, NC, United States)
Keever, J. (Research Triangle Inst. Research Triangle Park, NC, United States)
Date Acquired
September 5, 2013
Publication Date
November 1, 1985
Publication Information
Publisher: NASA
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NAS 1.26:3947
NASA-CR-3947
Accession Number
86N15358
Funding Number(s)
CONTRACT_GRANT: NASA ORDER L-78258B
PROJECT: RTOP 678-12-04-17
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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