Determination of quality indicators and antioxidant activity of various fruit juices.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determination of quality indicators and antioxidant activity of various fruit juices.

Popis výsledku v původním jazyce

For eight types of juices (apple, orange, pear, pineapple, pink grapefruit, cranberry, blackcurrant and apricot), a range of analytical parameters was analysed in order to use them as primary indicators of juice adulteration. Dry matter, relative density, pulp percentage, ash, pH and titratable acidity, conductivity, total content of proteins, formol number, proline and ascorbic acid were determined in all samples. Antioxidant activity of samples expressed as Trolox equivalent was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, 2,2&apos;-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) assay and ferric reducing antioxidant power (FRAP) assay. The results were in correlation with total phenolic content expressed as gallic acid equivalent. Phenolic compounds chlorogenic acid, caffeic acid, naringin, hesperidin, rutin, quercetin and 5-hydroxymethylfurfural were determined using high performance liquid chromatography. Concentration of these compounds in samples was very variable, mostly in the order of tens of milligrams per litre. Overall, the values of all parameters and the concentration of compounds were the most influenced by the type of fruit from which the juice was produced. The quality control parameters analysis showed that the samples analysed were not adulterated because the results obtained met almost all the requirements given in Czech technical standards.

Název v anglickém jazyce

Determination of quality indicators and antioxidant activity of various fruit juices.

Popis výsledku anglicky

For eight types of juices (apple, orange, pear, pineapple, pink grapefruit, cranberry, blackcurrant and apricot), a range of analytical parameters was analysed in order to use them as primary indicators of juice adulteration. Dry matter, relative density, pulp percentage, ash, pH and titratable acidity, conductivity, total content of proteins, formol number, proline and ascorbic acid were determined in all samples. Antioxidant activity of samples expressed as Trolox equivalent was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, 2,2&apos;-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) assay and ferric reducing antioxidant power (FRAP) assay. The results were in correlation with total phenolic content expressed as gallic acid equivalent. Phenolic compounds chlorogenic acid, caffeic acid, naringin, hesperidin, rutin, quercetin and 5-hydroxymethylfurfural were determined using high performance liquid chromatography. Concentration of these compounds in samples was very variable, mostly in the order of tens of milligrams per litre. Overall, the values of all parameters and the concentration of compounds were the most influenced by the type of fruit from which the juice was produced. The quality control parameters analysis showed that the samples analysed were not adulterated because the results obtained met almost all the requirements given in Czech technical standards.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10406 - Analytical chemistry

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Food and Nutrition Research

ISSN

1336-8672

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

12

Strana od-do

207-218

Kód UT WoS článku

000573227300004

EID výsledku v databázi Scopus

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