All samples were obtained from market control and included fruit flavored drinks, alcoholic drinks, jams, sweets and sugar confectionary. A 10-mL sample of drink was diluted with water in a volumetric flask of 50 mL. The samples were degassed, if
necessary, by strong stirring. The solid samples were homogenized.
A portion of 10 g of jam, sweet or a confectionary product was accurately weighted and dissolved in 50 mL of water. The sample solution was placed in ultrasonic bath for 15 min for the complete extraction of the colorants.
These solutions were filtered
through a folded paper filter and the filtrate was collected in volumetric flask of 50 mL.
All solutions were injected after filtering through 0.45-m disposable syringe filters.