In this review sample preparation strategies used for crude oil digestion in last ten years are
discussed focusing on further metals and non-metals determination. One of the main …

Challenges to identification, characterisation and determination of element species in crude
and residual oils, oil fractions, natural gas and gas condensates, and related products are …

As the world strives to create a more sustainable environment, green chemistry has come to
the fore in attempts to minimize the use of hazardous materials and shift the focus towards …

A study of the distributions of free and S-bound biomarkers and their δ13C values in the
extract of a bulk sample of the Permian Kupferschiefer from the Lower Rhine Basin has been …

Sediments from Units I and II of the Black Sea were analyzed to assess the early diagenetic
formation of organic sulfur compounds (OSC). A series of isomeric C28-2, 4 …

The coupling of size exclusion chromatography (SEC) and normal phase (NP) HPLC using
entirely organic mobile phases (tetrahydrofuran, xylene) with inductively coupled plasma …

Metalloporphyrins are ubiquitous in nature, particularly iron porphyrins (hemes) and
magnesium dihydroporphyrins or chlorophylls. Oxovanadium (IV) complexes of alkyl …

Maleimides (1H-pyrrole-2, 5-diones), degradation products of photosynthetic tetrapyrrole
pigments, have been found for the first time in the polar fraction of the solvent extracts of two …

Selective chemical degradations have been performed on sulfur-rich macromolecular
organic matter from sediments of the Messinian of Sicily (Upper Miocene, Italy). The …

The effects of weathering on the organic matter within a narrow sediment interval from
surficial to 10 m depth belonging to the Lower Toarcian shales of the Paris basin, were …