“…Unfortunately, the location of harvest, species, sample size, storage methods and proximate composition values were not routinely given. Analytical methods for vitamin C described in some papers include titration with 2,6-dichlorophenol-indophenol (Hoygaard, 1941;Hjarde et al, 1952;Hoffman et al, 1967;Rodahl, 1949;) and determination with the derivative of 2,4-dinitrophenylhydrazine (Heller and Scott, 1967;Mann et al, 1962;Geraci and Smith, 1979). These methods are known to be subject to interferences, lack specificity for vitamin C and have low sensitivity (Washko et al, 1992).…”