Analysis of trace oxygenated hydrocarbons in the environment |
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| Authors: | David Pierotti |
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| Institution: | (1) Department of Earth and Planetary Sciences, Harvard University, 02138 Cambridge, MA, U.S.A.;(2) Present address: Marine Science Institute, University of California, Santa Barbara, Goleta, California, U.S.A. |
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| Abstract: | A technique has been developed which can measure low-molecular-weight (C2–C5) oxygenated hydrocarbons down to concentrations of less than 10 parts per trillion (10-12) in the atmosphere. The method uses cryogenic trapping of trace gases from the air, and two-dimensional gas chromatography (2DGC) with flame ionization and photo-ionization detectors to analyze the samples. The method has been used to make extensive measurements in the field, and it is capable of measuring all of the C2–C5 carbonyl compounds in clean tropospheric air. The 2DGC analytical system also makes it possible to prepare accurate, reproducible standards of the low-molecular-weight oxygenated hydrocarbons at trace levels. |
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| Keywords: | Oxygenated hydrocarbons sampling analysis |
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