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.
|Statement||by Edward T. Peltzer, Jane B. Alford and Robert B. Gagosian.|
|Series||WHOI -- 84-9., Technical report, WHOI (Series) -- 84-9., Technical report (Woods Hole Oceanographic Institution)|
|Contributions||Alford, Jane B., Gagosian, Robert B., Woods Hole Oceanographic Institution.|
|The Physical Object|
|Pagination||vii, 104 p. :|
|Number of Pages||104|
Analytica Chimica Acta, () Elsevier Science Publishers B.V., Amsterdam -Printed in The Netherlands SAMPLING AND QUANTITATION OF LIPIDS IN AEROSOLS FROM THE REMOTE MARINE ATMOSPHEREa EDWARD T. PELTZER* and ROBERT B. GAGOSIAN Department o f Chemistry, Woods Hole Oceanographic Institution, Woods Hole, MA (U.S.A.) Cited by: Methods for the sampling and analysis of marine aerosols: results from the GEOTRACES aerosol intercalibration experiment Peter L. Morton 1*, William M. Landing 1, Shih-Chieh Hsu 2, Angela Milne 3, Ana M. Aguilar-Islas 4, Alex R. Baker 5, Andrew R. Bowie 6,Cited by: The qualitative analysis of lipid involves some preliminary tests and specific tests to detect the presence or absence of lipids and to classify the different groups of lipids based on their chemical reactivity with the chemical reagent. The presence of lipids in the qualitative analysis is measured by the colour change. Part C contains 7 chapters that cover the development of practical aerosol sampling instrumentation, and how technical designs and methods have evolved over the years in order that aerosol sampling may be carried out in a manner matching the health-related and other criteria that have been proposed as parts of standards.
The percentage of lipid in the initial sample (M sample) can then be calculated: %Lipid = ´ (M lipid /M sample). A number of instrument manufacturers have designed modified versions of the Soxhlet method that can be used to determine the total lipid content more easily and rapidly (e.g. Soxtec). spring have rarely been conducted for lipid class com-pounds [Kawamura, ]. In order to understand the linkage between terrestrial biomarkers in the atmosphere and those in the pelagic sediments, it is needed to obtain the data set of long-term observation on the terrestrial bio-markers in the remote marine aerosol particles. Such under-. Obesity is associated with alterations in the composition and amounts of lipids. Lipids have over million representatives. Most lipid groups differ in composition, properties and chemical structure. These small molecules control various metabolic pathways, determine the metabolism of other compounds and are substrates for the syntheses of different derivatives. Online analysis also facilitates aerosol sampling from aircraft platforms, in low particle concentration environments, or when a rare subset of the particle population is the target, such as ice-nucleating particles. 5–11 Offline single-particle analysis can often provide more detailed chemical and morphological characterization than is.
variations of the lipid compounds in the marine aerosols and discuss the source regions and the pathways for a long-range atmospheric transport of terrestrial organic matter over the western North Pacific. Meteorological data were used to interpret the concentrations of terrestrial biomarkers. 2. Sample and Method Aerosol sampling was conducted. Marine meteorology: Marine resources development and management. The "Marion" expedition to Davis strait and Baffin bay under the direction of the United States Coast guard, The mesopelagic fishes collected during Cruise 17 of the R/V Chain: Methodology for sampling and analysis of lipids in aerosols from the remote marine atmosphere: MIT. This approach takes advantage of the unique molecular signatures or source “fingerprints” for various lipid compound classes of marine and terrestrial plants and animals to identify the sources of the organic substances in aerosols. However, studies on lipids and their biological relevance are not limited to n-3 PUFAs or other individual lipids, but also include the analysis of all lipid species from a biological sample—the lipidome. Because lipids are intermediates and even signaling molecules of metabolic pathways, the lipidomic response (change of the lipidome pattern.