1980
DOI: 10.1021/ac50053a009
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Preparative hydrocarbon group type determination by automated medium pressure liquid chromatography

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Cited by 519 publications
(190 citation statements)
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“…According to Wiesenberg et al (in press) the total lipid extract (TLE) was separated into two fractions by elution on a KOH coated SiO 2 column: (i) a neutral fraction and (ii) an acid fraction, containing mainly fatty acids. The neutral lipids were subsequently separated using the medium-pressure liquid chromatography separation scheme (MPLC) described by Radke et al (1980) to gain the aliphatic hydrocarbons, which were directly amenable for gas chromatographic analyses. For quantification, a defined amount of d 50 -n-C 24 alkane was added to each sample.…”
Section: Methodsmentioning
confidence: 95%
“…According to Wiesenberg et al (in press) the total lipid extract (TLE) was separated into two fractions by elution on a KOH coated SiO 2 column: (i) a neutral fraction and (ii) an acid fraction, containing mainly fatty acids. The neutral lipids were subsequently separated using the medium-pressure liquid chromatography separation scheme (MPLC) described by Radke et al (1980) to gain the aliphatic hydrocarbons, which were directly amenable for gas chromatographic analyses. For quantification, a defined amount of d 50 -n-C 24 alkane was added to each sample.…”
Section: Methodsmentioning
confidence: 95%
“…After asphaltene precipitation the low polar lipid fraction was separated into an aliphatic, aromatic and hetero-compound (containing nitrogen, oxygen and sulphur-components, NSO) fraction using a medium-pressure liquid chromatography (MPLC) (Radke et al, 1980). An aliquot of the NSO fraction was investigated for tetraether lipids (glycerol dialkyl glycerol tetraether, GDGT) and archaeol using a Shimadzu LC20AD HPLC instrument coupled to a Finnigan TSQ 7000 triple 25 quadrupole MS with an atmospheric pressure chemical ionization (APCI) interface.…”
Section: Microbial Lipid Biomarker Analysismentioning
confidence: 99%
“…Activated copper granules were added to the total lipids to remove elemental S. Separation of carboxylic acids and the high polarity fraction was carried out by column chromatography with KOH-silica gel (McCarthy and Duthie 1962). The low polarity fraction was further separated using Medium Pressure Liquid Chromatography (MPLC) with hexane as the only eluent (Radke et al 1980). A pre-column was filled with deactivated silica gel where the neutral fraction was injected.…”
Section: Sedimentological and Geochemical Analysesmentioning
confidence: 99%