Stanovení nižších volných mastných kyselin v pivu sorpční extrakcí na míchací tyčince

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193697%3A_____%2F08%3A%230000419" target="_blank" >RIV/60193697:_____/08:#0000419 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determination of free medium-chain fatty acids in beer by stir bar sorptive extraction

Popis výsledku v původním jazyce

Free medium-chain fatty acids in beer originate from raw materials, mainly from the fermentation activity of yeasts, and can influence beer taste, vitality of yeasts and also the foam stability of beer. This study presents the development of the method for the determination of free fatty medium-chain acids including caproic acid, caprylic acid, capric acid and lauric acid in beer or wort using stir bar sorptive extraction (SBSE). The combination of this extraction technique with solvent back extractionof the extracted analytes and subsequent gas chromatographic analysis with flame ionisation detection was used for the determination of these compounds. The influences of different solvent back solutions, sampling time, solvent back extraction times anddifferent contents of ethanol were studied. The method had high repeatability (RSD <6.7%), good linearity (the correlation coefficients were higher than 0.9963 for quadratic curves over the concentration range 0.5 to 8.0 mg/l) and recover

Název v anglickém jazyce

Determination of free medium-chain fatty acids in beer by stir bar sorptive extraction

Popis výsledku anglicky

Free medium-chain fatty acids in beer originate from raw materials, mainly from the fermentation activity of yeasts, and can influence beer taste, vitality of yeasts and also the foam stability of beer. This study presents the development of the method for the determination of free fatty medium-chain acids including caproic acid, caprylic acid, capric acid and lauric acid in beer or wort using stir bar sorptive extraction (SBSE). The combination of this extraction technique with solvent back extractionof the extracted analytes and subsequent gas chromatographic analysis with flame ionisation detection was used for the determination of these compounds. The influences of different solvent back solutions, sampling time, solvent back extraction times anddifferent contents of ethanol were studied. The method had high repeatability (RSD <6.7%), good linearity (the correlation coefficients were higher than 0.9963 for quadratic curves over the concentration range 0.5 to 8.0 mg/l) and recover

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Chromatography A

ISSN

0021-9673

e-ISSN

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Svazek periodika

1196-1197

Číslo periodika v rámci svazku

2008-07-04

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

96-99

Kód UT WoS článku

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EID výsledku v databázi Scopus

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