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| rdf:type
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| Description
| - Stanovení polyfenolů pomocí spektrofotometrické detekce je složité vzhledem k jejich nízkým koncentracím v pivu. Vzorky piv byly zkoncentrovány před jejich chromatografickým stanovením se spektrometrickou koncovkou z důvodu jejich detekce. Analytická metoda stanovení založená na extrakci na tuhé fázi (SPE) a následovaná vysokoúčinnou kapalinovou chromatografií s detekcí diodovým polem byla použita pro stanovení množství volné galové, protokatechové, kávové, p-kumarové, ferulové a salicylové kyseliny a (+)-katechinu, (-)-epikatechinu a quercetinu. Tyto fenolové sloučeniny se podílí na koloidní a senzorické stabilitě piva. Bylo testováno šest různých SPE kolonek a tři různé typy eluce s nejvhodnějšími rozpouštědly (acetonitril, aceton a methanol) were used. Účinnost HPLC metody byla odhadnuta pomocí vyhodnocení parametrů jako absolutní recovery, relativní standardní odchylka (RSD - nižší než 10%), limit stanovení (LOQ), a limit detekce (LOD). Je uveden obsah polyfenolů v různých typech českých piv. (cs)
- The determination of polyphenols by spectrophotometric detection is complicated due to their low concentrations in beer. The beer samples have to be pre-concentrated before using the spectrophotometric detection for their quantification. An analytical method based on solid-phase extraction (SPE) and followed by high performance liquid chromatographic separation with diode-array detection is used for the determination of free gallic, protocatechuic, caffeic, p-coumaric, ferulic and salicylic acids, of (+)-catechin, (-)-epicatechin, and quercetin. These phenolic compounds participate in colloidal and sensory stability of beer. Six different SPE cartridges were tested and three different types of elution with the most appropriate solvents (acetonitrile, acetone and methanol) were used. The performance of the HPLC method was assessed by the evaluation of parameters such as absolute recovery, relative standard deviation (RSD - lower than 10%), the limit of quantification (LOQ), and the limit of detection
- The determination of polyphenols by spectrophotometric detection is complicated due to their low concentrations in beer. The beer samples have to be pre-concentrated before using the spectrophotometric detection for their quantification. An analytical method based on solid-phase extraction (SPE) and followed by high performance liquid chromatographic separation with diode-array detection is used for the determination of free gallic, protocatechuic, caffeic, p-coumaric, ferulic and salicylic acids, of (+)-catechin, (-)-epicatechin, and quercetin. These phenolic compounds participate in colloidal and sensory stability of beer. Six different SPE cartridges were tested and three different types of elution with the most appropriate solvents (acetonitrile, acetone and methanol) were used. The performance of the HPLC method was assessed by the evaluation of parameters such as absolute recovery, relative standard deviation (RSD - lower than 10%), the limit of quantification (LOQ), and the limit of detection (en)
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| Title
| - Determination of polyphenols in beer by an effective method based on solid-phase extraction and high performance liquid chromatography with diode-array detection.
- Determination of polyphenols in beer by an effective method based on solid-phase extraction and high performance liquid chromatography with diode-array detection. (en)
- Stanovení polyfenolů v pivu pomocí efektivní metody založené na extrakci na tuhé fázi a kapalinové chromatografii s detekcí diodovým polem. (cs)
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| skos:prefLabel
| - Determination of polyphenols in beer by an effective method based on solid-phase extraction and high performance liquid chromatography with diode-array detection.
- Determination of polyphenols in beer by an effective method based on solid-phase extraction and high performance liquid chromatography with diode-array detection. (en)
- Stanovení polyfenolů v pivu pomocí efektivní metody založené na extrakci na tuhé fázi a kapalinové chromatografii s detekcí diodovým polem. (cs)
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| skos:notation
| - RIV/60461373:22330/07:00019111!RIV08-MSM-22330___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(1M0570), Z(MSM6046137305)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22330/07:00019111
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Polyphenols; beer; HPLC; SPE; spectrophotometric detection (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Czech Journal of Food Science
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Dostálek, Pavel
- Dvořáková, Markéta
- Karabín, Marcel
- Hulín, Petr
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| http://linked.open...n/vavai/riv/zamer
| |
| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
| |
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