Antioxidant Activities, Total Phenolics and Riboflavin Profiles of Turkish Commercial Apricot Nectars

This study was performed to revealthe total phenolic contents, antioxidant activities andriboflavin (RF) (Vitamin B2) contents of eightcommercial apricot nectarssold in Turkish markets. The total phenolic contents of nectars were analyzed with Folin-Ciocalteu's method. Two comparative antioxidant activities, namely 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing capacities (FRAP) were found for eight nectar samples. A fastcapillary electrophoretic method which is combined with laser-inducedfluorescence(LIF) detectorwas applied for the riboflavin analysis. TPs values are ranged between 288-680 mg gallic acid equivalent (GAE)/L, % inhibitions inDPPH methodarebetween 30.58-98.01% and finally FRAP values are between 1.77-5.56 mmol Fe2+/L. A high correlation (r > 0.893) was observed between two antioxidant test systems.RF contents of apricot nectars are ranged between 20.50-103.37 μg/L. Apricot nectar juices may be considered as a good a supporting dietary source for the daily vitamin B2 intake