FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W48264443> ?p ?o ?g. }

• W48264443 abstract "Understanding the composition of atmospheric organic particulate matter (OPM) is essential for predicting its effects on climate, air quality, and health. However, the polar oxygenated fraction (PO-OPM), which includes a significant mass contribution from carboxylic acids, is difficult to speciate and quantitatively determine by current analytical methods such as gas chromatography-mass spectrometry (GC-MS). The method of chemical derivatization and two-dimensional GC with time of flight MS (GC×GC/TOF-MS) was examined in this study for its efficacy in: 1) quantifying a high percentage of the total organic carbon (TOC) mass of a sample containing PO-OPM; 2) quantitatively determining PO-OPM components including carboxylic acids at atmospherically relevant concentrations; and 3) tentatively identifying PO-OPM components. Two derivatization reagent systems were used in this study: BF₃/butanol for the butylation of carboxylic acids, aldehydes, and acidic ketones, and BSTFA for the trimethylsilylation (TMS) of carboxylic acids and alcohols. Three α-pinene ozonolysis OPM filter samples and a set of background filter samples were collected by collaborators in a University of California, Riverside environmental chamber. Derivatization/GC×GC TOF-MS was used to tentatively identify some previously unidentified α-pinene ozonolysis products, and also to show the characteristics of all oxidation products determined. Derivatization efficiencies as measured were 40-70% for most butyl derivatives, and 50-58% for most trimethylsilyl derivatives. A thermal optical method was used to measure the TOC on each filter, and a value of the quantifiable TOC mass using a gas chromatograph was calculated for each sample using GC×GC separation and the mass-sensitive response of a flame ionization detector (FID). The TOC quantified using TMS and GC×GC-FID (TMS/TOCGC×GC FID) accounted for 15-23% of the TOC measured by the thermal-optical method. Using TMS and GC×GC/TOF-MS, 8.85% of the thermal optical TOC was measured and 48.2% of the TMS/TOCGC×GC-FID was semi-quantified using a surrogate standard. The carboxylic acids tentatively identified using TMS and GC×GC/TOF-MS accounted for 8.28% of the TOC measured by thermal optical means. GC×GC TOF-MS chromatograms of derivatized analytes showed reduced peak tailing due in part to the lesser interactions of the derivatized analytes with the stationary phase of the chromatography column as compared to the chromatograms of underivatized samples. The improved peak shape made possible the greater separation, quantification, and identification of high polarity analytes. Limits of detection using derivatization and GC×GC/TOF-MS were μL injected for a series of C2-C6 di-acids, cis-pinonic acid, and dodecanoic acid using both butylation and TMS. Derivatization with GC×GC/TOF-MS was therefore effective for determining polar oxygenated compounds at low concentrations, for determining specific oxidation products not previously identified in OPM, and also for characterizing the probable functional groups and structures of α-pinene ozonolysis products." @default.
• W48264443 created "2016-06-24" @default.
• W48264443 creator A5060214739 @default.
• W48264443 date "2000-01-01" @default.
• W48264443 modified "2023-10-18" @default.
• W48264443 title "Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids" @default.
• W48264443 doi "https://doi.org/10.15760/etd.544" @default.
• W48264443 hasPublicationYear "2000" @default.
• W48264443 type Work @default.
• W48264443 sameAs 48264443 @default.
• W48264443 citedByCount "0" @default.
• W48264443 crossrefType "report" @default.
• W48264443 hasAuthorship W48264443A5060214739 @default.
• W48264443 hasBestOaLocation W482644431 @default.
• W48264443 hasConcept C107872376 @default.
• W48264443 hasConcept C123460561 @default.
• W48264443 hasConcept C162356407 @default.
• W48264443 hasConcept C178790620 @default.
• W48264443 hasConcept C185592680 @default.
• W48264443 hasConcept C205345274 @default.
• W48264443 hasConcept C2776209890 @default.
• W48264443 hasConcept C2776923573 @default.
• W48264443 hasConcept C2779074116 @default.
• W48264443 hasConcept C2779173278 @default.
• W48264443 hasConcept C43617362 @default.
• W48264443 hasConceptScore W48264443C107872376 @default.
• W48264443 hasConceptScore W48264443C123460561 @default.
• W48264443 hasConceptScore W48264443C162356407 @default.
• W48264443 hasConceptScore W48264443C178790620 @default.
• W48264443 hasConceptScore W48264443C185592680 @default.
• W48264443 hasConceptScore W48264443C205345274 @default.
• W48264443 hasConceptScore W48264443C2776209890 @default.
• W48264443 hasConceptScore W48264443C2776923573 @default.
• W48264443 hasConceptScore W48264443C2779074116 @default.
• W48264443 hasConceptScore W48264443C2779173278 @default.
• W48264443 hasConceptScore W48264443C43617362 @default.
• W48264443 hasLocation W482644431 @default.
• W48264443 hasOpenAccess W48264443 @default.
• W48264443 hasPrimaryLocation W482644431 @default.
• W48264443 hasRelatedWork W2024535051 @default.
• W48264443 hasRelatedWork W2028935477 @default.
• W48264443 hasRelatedWork W2033413454 @default.
• W48264443 hasRelatedWork W2047511728 @default.
• W48264443 hasRelatedWork W2081925920 @default.
• W48264443 hasRelatedWork W2093181509 @default.
• W48264443 hasRelatedWork W2096652817 @default.
• W48264443 hasRelatedWork W2118349567 @default.
• W48264443 hasRelatedWork W2379615624 @default.
• W48264443 hasRelatedWork W4304689672 @default.
• W48264443 isParatext "false" @default.
• W48264443 isRetracted "false" @default.
• W48264443 magId "48264443" @default.
• W48264443 workType "report" @default.