title: Portable micro method for quantitative determination of vitamin C in fruit and vegetable juices.
abstract: A portable rapid and accurate micro method is described for the quantitative determination of vitamin C in fruit and vegetable juices. Chromatographic paper is impregnated with DCP by immersion in 95% ethanol solution and sprayed with a protective starch solution. Papers are usable indefinitely when protected from moisture, light, air, and high temperatures. Determinations can be completed in 60 s with an accuracy of +/- 2.0 mg/100 mL fruit or vegetable juice. Cloudy or lightly colored samples do not interfere with the determination. The method was compared with the official AOAC 2,6-dichloroindophenol (DCP) titration method and gave a linear correlation coefficient of 0.99749.
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D002845:Chromatography; D005638:Fruit / Q000032:analysis*; D008832:Microchemistry; D014675:Vegetables / Q000032:analysis*
chemical_list: D001205:Ascorbic Acid