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1.
Vpliv embalaže in skladiščnih pogojev na vsebnost fenolnih spojin v vinih Modri Pinot in Zelen
Karin Kurinčič, 2012, undergraduate thesis

Found in: ključnih besedah
Summary of found: ...vino, skladiščenje, vinski zamaški, vinske steklenice, antociani, hidroksicimetne kisline, ...
Keywords: diplomske naloge, vino, skladiščenje, vinski zamaški, vinske steklenice, antociani, hidroksicimetne kisline
Published: 15.10.2013; Views: 3089; Downloads: 269
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2.
Determination of the actual uptake of essential nutrients by different parts of Vitis vinifera L. cv. Rebula
Kristina Brataševec, 2013, doctoral dissertation

Found in: ključnih besedah
Summary of found: ...vinska trta, Rebula, gnojenje, kakovost grozdja, hidroksicimetne kisline, ekstrakcija tal, disertacije, ...
Keywords: vinska trta, Rebula, gnojenje, kakovost grozdja, hidroksicimetne kisline, ekstrakcija tal, disertacije
Published: 25.04.2014; Views: 2826; Downloads: 268
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3.
Determination of polyphenols in white grape berries cv. Rebula
Polonca Trebše, Branka Mozetič Vodopivec, Irma Tomažič, Andreja Škvarč, 2006, original scientific article

Found in: ključnih besedah
Summary of found: ...belo grozdje, HPLC-DAD, MS/MS, hidroksicimetne kisline, ...
Keywords: belo grozdje, HPLC-DAD, MS/MS, hidroksicimetne kisline
Published: 10.07.2015; Views: 2458; Downloads: 13
URL Fulltext (0,00 KB)

4.
Identification of sweet cherry anthocyanins and hydroxycinnamic acids using HPLC coupled with DAD and MS detector
Polonca Trebše, Branka Mozetič Vodopivec, 2004, original scientific article

Abstract: In absence of standards, HPLC coupled with DAD offers identification of polyphenols by scanning UV-Vis spectra of individual components, which spectral characteristics are unique, but not selective. At the same time HPLC-DAD determination methods of polyphenols differ in mobile phase solutions resulting in DAD scanned spectra deviation between different studies, aggravating the precise identification based on agreement to UV-Vis data from literature. Mass spectrometry (MS) detection with molar weight determination of the individual components in the sample enables more precise identification of compounds eluted from the column. Sweet cherry Petrovka polyphenols were separated on C18 Hypersil PEP 300 column (250 x 4.6 mm, 5 [mu]m) using gradient solvent mixture consisting of methanol, water and formic acid. MS and UV-Vis spectra of eluted anthocyanins and hydroxycinnamic acid were recorded. HPLC-MS analyses were performed using a LCQ [sup]TM ion trap, Finnigan, MAT mass spectrometer by atmospheric pressure chemical ionisation (ACPI). Molecular and fragmented ion masses of sweet cherry hydroxycinnamic acids and anthocyanins were determined and with UV-Vis spectra, in the range of 190-600 nm, used for identification of compounds. Electro spray mass spectrum of two hydroxycinnamic acids produced ions with m/z ratios of 353.0 and 337.0, which corresponded to molecular weights of neochlorogenic acid and 3'-p-coumarylquinic acid. The molecular weights of 5 anthocyanins corresponded to cyanidin-3-glucoside (449.0), cyanidin-3-rutinoside (595.1), peonidin-3-glucoside (463.1), pelargonidin-3-rutinoside (579.1) and peonidin-3-rlltinoside (609.2).
Found in: ključnih besedah
Summary of found: ...češnje, antociani, hidroksicimetne kisline, HPLC-DAD/MS, ...
Keywords: češnje, antociani, hidroksicimetne kisline, HPLC-DAD/MS
Published: 10.07.2015; Views: 2597; Downloads: 7
URL Fulltext (0,00 KB)

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