(Detection of non declared fruit additives in fruit products and their non-adulteration by determination of flavonoids)

adulteration analytical methods apples black currants cassis chemical composition citrus composition chimique composition globale confiture figs figue flavonoide flavonoides flavonoids fraise fresa fruit juices fruit products granadilla grape juice grenadille groseille rouge grosella negra grosella roja higo jams jugo de frutas jus de raisin manzana passion fruits pears pera poire pomme productos derivados de las frutas proximate composition red currants strawberries technique analytique zumo de uva