Search results for "TLC"

showing 2 items of 22 documents

Identification of bound alcohols in soil humic acids by gas chromatography-mass spectrometry

2000

International audience; Humic acids are complex, partly macromolecular, yellow-brownish substances occurring in soils, waters and sediments. In order to shed some light on their molecular structure, crop humic acids were cleaved by alkaline hydrolysis (KOH). The products were fractionated by thin layer chromatography to give mono-alcohols which were analysed as acetate derivatives by gas chromatography coupled to mass spectrometry. Linear alcohols, sterols, stanols and plant-derived triterpenoid alcohols were identified by co-injection of pure standards and by comparison with literature data. These findings imply that alcohols could have been incorporated into the humic matrix by esterifica…

[SDE] Environmental SciencescampesterolKOH hydrolysisstanols[SDV]Life Sciences [q-bio]TLCFatty alcoholBrassicasterolAlkaline hydrolysis (body disposal)chemical degradation[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study010402 general chemistryMass spectrometry01 natural sciencescomplex mixtureskerogenchemistry.chemical_compoundsterolstigmasterolOrganic chemistrySpectroscopyChromatographyhuminChemistryhumic substancesamyrin010401 analytical chemistrybrassicasterolcholesterolGeneral MedicineAtomic and Molecular Physics and OpticsThin-layer chromatography0104 chemical sciences[SDV] Life Sciences [q-bio]CHIMIE ANALYTIQUEsitosteroln-alkanols[SDE]Environmental SciencesHumintriterpenoidGas chromatographyGas chromatography–mass spectrometryGC-MSfatty alcohol
researchProduct

HPTLC fingerprinting—rapid method for the differentiation of honeys of different botanical origin based on the composition of the lipophilic fractions

2018

Bee honey possess various nutritional and medicinal functions, which are the result of its diverse chemical composition. The numerous bioactive compounds in honey come from flower nectar

animal structuresPharmaceutical ScienceDandelionfood quality01 natural sciencesArticlehoney fingerprintAnalytical Chemistrylcsh:QD241-441HPTLC0404 agricultural biotechnologylcsh:Organic chemistryDrug DiscoveryNectarSolid phase extractionPhysical and Theoretical ChemistryChemical compositionChromatography High Pressure LiquidChromatographyultrasound assisted extractionMilk ThistleChemistry010401 analytical chemistryOrganic ChemistryExtraction (chemistry)digestive oral and skin physiologyfungisolid phase extractionfood and beverages04 agricultural and veterinary sciencesHoney040401 food scienceThin-layer chromatography0104 chemical sciencesBlowing a raspberryhoney authenticationChemistry (miscellaneous)behavior and behavior mechanismsMolecular MedicineFood AnalysisMolecules
researchProduct