The study of phenolic profiles of fresh apricots and pumpkins and their purees for the evaluation of apricot nectar azthenticity (CROSBI ID 500968)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Dragović-Uzelac, Verica ; Pospišil Jasna ; Delonga Karmela ; Branka, Levaj
engleski
The study of phenolic profiles of fresh apricots and pumpkins and their purees for the evaluation of apricot nectar azthenticity
The possibility of proving tha authenticity of the apricot nectars has been investigated by using the phenolic compounds fingerprint. The phenolic composition of the fresh material (two varieties of apricot and oumpkin), their purees and apricot nectars (with and without adding of definite shares of pumpkin puree) prepared under laboratory conditions, and those excluded from the local marcet has been determined by the high performance liquid chromatography (HPLC) with the UV Diode Array detection. Two different extraction methods were needed for the phenolic separation, one of them for flavonols and another for phenolic acids, flavan-3-ols, flavonol glycoside and related compounds. Analyses showed that in both varieties of apricot a lot of phenolic compounds have been determined (quercetin, kaempferol, chlorogenic acid, caffeic acid, p-coumaric acid, (+)-catechin, (-)-epicatechin, rutin, procyanidins) and in both varieties of pumpkin only the chlorogenic acid and syringic acid. Syringic acid is the compound characteristic for pumpkin and it was identified accoding to UV and IR spectra and polarity. Therefore, the pumpkin admixture of even lower levels (5%) in the apricot nectars could be proven by using the syringic acid. The cheaper pumpkin admixtures in apricot nectars could not be assumed by the sensory evaluation, particularly if present in quantities lowere than 15%.
authenticity; apricot; pumpkin; syringic acid; HPLC
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
101-x.
2004.
objavljeno
Podaci o matičnoj publikaciji
Book of abstract
Hungarian Academy of Science
Budimpešta:
Podaci o skupu
2nd Central European Congress on Food
poster
26.04.2004-28.04.2004
Budimpešta, Mađarska