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- W3024959928 endingPage "105039" @default.
- W3024959928 startingPage "105039" @default.
- W3024959928 abstract "Nitrogen compounds (N-compounds) used as markers in crude oils and source rocks are mainly present as alkylated aromatic heterocycles with a predominance of neutral pyrrolic structures over basic pyridinic forms. This study describes the molecular markers employed, with an overview of sample preparation methods and gas chromatographic techniques used in qualitative and quantitative characterization of N-compounds. The advantages, disadvantages, and applications of rock extraction procedures, such as Soxhlet extraction and ultrasound-assisted extraction, as well as modern techniques, such as Soxtherm rapid automatic system and accelerated solvent extraction, were assessed. Furthermore, pre-fractionation techniques in reducing matrix suppression, such as open column chromatography, medium pressure liquid chromatography, and solid-phase extraction, were described. Subsequently, the procedures for N-compound chromatographic analysis using gas chromatography-mass spectrometry, gas chromatography nitrogen phosphorous detector, and comprehensive two-dimensional chromatography were addressed, highlighting the potential of their applications." @default.
- W3024959928 created "2020-05-21" @default.
- W3024959928 creator A5001522564 @default.
- W3024959928 creator A5048979199 @default.
- W3024959928 creator A5075240543 @default.
- W3024959928 creator A5086574537 @default.
- W3024959928 date "2020-09-01" @default.
- W3024959928 modified "2023-09-23" @default.
- W3024959928 title "Nitrogen compounds as molecular markers: An overview of analytical methodologies for its determination in crude oils and source rock extracts" @default.
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