Methodology for sampling and analysis of lipids in aerosols from the remote marine atmosphere

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1984-04Author
Peltzer, Edward T.
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Alford, Jame B.
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Gagosian, Robert B.
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https://hdl.handle.net/1912/1346DOI
10.1575/1912/1346Abstract
A procedure is described for the collection of remote marine aerosol samples by high-volume filtration, cascade impaction, dry fallout collection and rain.
Samples were analyzed quantitatively for five classes of naturally occurring
lipids (n-alkanes, wax esters, fatty alcohols, sterols, and fatty acids) and polycyclic
aromatic hydrocarbons (PAHs). Air samples (4,000-10,000 m3) were collected
on glass fiber filters under automatic control. Rain samples of 1-5 L were collected
on an event basis. Filters and rain samples were extracted with methylene chloride.
The extracts were fractionated into discrete chemical classes by silca-gel absorption
chromatography. The fractions were derivatized if necessary and analyzed by
HRGC and HRGC/MS. A second fiter extraction was required for
fatty acid salt analysis. Internal standards were used to quantify recoveries
and concentrations. Mean recoveries relative to the internal standards were
96.5% for C12-C36 n-alkanes, 96.4% for C12-C30 n-fatty acids, 92.5% for C12-C30
n-fatty alcohols and 93.3% for cholesterol. Typical blanks and concentrations
for remote marine aerosol and rain samples are described and compared with
other methods used in coastal marine, rural and suburban sampling locations.
Suggested Citation
Technical Report: Peltzer, Edward T., Alford, Jame B., Gagosian, Robert B., "Methodology for sampling and analysis of lipids in aerosols from the remote marine atmosphere", 1984-04, DOI:10.1575/1912/1346, https://hdl.handle.net/1912/1346Related items
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