Organic geochemistry of marine sediments of the Subantarctic Indian Ocean sector: Lipid classes—sources and fate

Cell lysis and release of particulate polysaccharides in extensive marine mucilage assessed by lipid biomarkers and molecular probes

“…A stepwise method was used to separate the different lipid classes, with 3 consecutive developing solvent systems of increasing polarity. After each development, partial scans of the Chroma-rods were performed to quantify the lipid classes eluted away from the initial spot (Volkman et al 1986, Laureillard et al 1997. The flame ionization detector (FID) was operated with a hydrogen flow of 160 m1 min-', an air flow of 1800 m1 min-', and the 'rods' were scanned in 30 S. Peak areas were integrated using 'Boreal' software (JMBS, Grenoble).…”

Qualitative and quantitative assessment of unresolved complex mixture in PM2.5 of Bakersfield, CA

“…Lubricating oils are known to be a major source of environmental hydrocarbon contamination Rowland, 1990, 1991). In environmental samples, the presence of UCM is considered to be an indicator for petroleum pollution (White et al, 2013); other than crude oil and petroleum products, recently photosynthesized carbon or naturally derived lipids may also contribute to UCM in aerosols and sediments (Venkatesan and Kaplan, 1982;Laureillard et al, 1997;Silva et al, 2012). In earlier studies, a ratio of the UCM to resolved components (U:R) in atmospheric organic aerosols, observed during GCMS analysis, has been used as a qualitative indicator for the degree of anthropogenic contribution to atmospheric organic carbon (Cox et al, 1982;Simoneit and Mazurek, 1982;Mazurek et al, 1989;Hildemann et al, 1991).…”

Use of lipids to study the trophic ecology of deep-sea xenophyophores

“…Analysis of lipid classes. The analytical procedure used for the lipid extraction and analysis using a Iatroscan MK-5 analyser (thin layer chromatography/ flame ionization detector; TLC/FID) is described in detail by Laureillard et al (1997) and Pinturier-Geiss et al (2001).…”

“…Derivatization and gas chromatography (GC) analysis: The lipid extracts were treated as described in Laureillard et al (1997). Briefly, the acyl lipid classes were transesterified, after addition of an internal standard: deuterated tricosanoic acid (C 22 D 45 COOH).…”