Počet záznamů: 1
Localization of Double Bonds in Wax Esters by High-Performance Liquid Chromatography/Atmospheric Pressure Chemical Ionization Mass Spectrometry Utilizing Fragmentation of Acetonitrile-Related Adducts
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SYSNO ASEP 0359271 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Localization of Double Bonds in Wax Esters by High-Performance Liquid Chromatography/Atmospheric Pressure Chemical Ionization Mass Spectrometry Utilizing Fragmentation of Acetonitrile-Related Adducts Tvůrce(i) Vrkoslav, Vladimír (UOCHB-X) RID, ORCID
Háková, Martina (UOCHB-X)
Pecková, K. (CZ)
Urbanová, Klára (UOCHB-X) RID
Cvačka, Josef (UOCHB-X) RID, ORCIDCelkový počet autorů 5 Zdroj.dok. Analytical Chemistry. - : American Chemical Society - ISSN 0003-2700
Roč. 83, č. 8 (2011), s. 2978-2986Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Ion-molecule reactions ; lipids Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GA203/09/0139 GA ČR - Grantová agentura ČR CEZ AV0Z40550506 - UOCHB-X (2005-2011) UT WOS 000289223700021 DOI 10.1021/ac1030682 Anotace Unsaturated wax esters (WEs) provided molecular adducts with C3H5N ([M+55]+.) in APCI sources in the presence of acetonitrile. CID of [M+55]+. gave fragments allowing localization of double bond(s) in hydrocarbon chains of WEs. These fragments were formed by cleavage of C-C bonds next to the double bond from its both sides. In methylene-interrupted polyunsaturated WEs, the diagnostic fragments related to each double bond were detected; the most abundant were those corresponding to cleavage of C-C bond next to the first and the last double bond. A simple nomenclature based on .alpha. and .omega. ions has been introduced. A data-dependent HPLC/APCI-MS2 method for comprehensive characterizing WEs in their complex mixtures has been developed and applied to natural mixtures of WEs isolated form jojoba oil and beeswax. More than 50 WE molecular species were completely identified, including information on acid and alcohol chain length and position of double bonds. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Rok sběru 2012
Počet záznamů: 1