Fig. 3B is the chromatogram resulting from the analysis of a
pomegranate containing commercial beverage (Honest Ade Pomegranate
Blue). Although the name of the beverage suggests a high
content of pomegranate juice, the labelling provided by the manufacturer
indicates that the product contains a total juice content of
10%, of which pomegranate juice concentrate is listed second following
grape juice concentrate. The fact that punicalagin A and B
were detected supports that the product contains pomegranate,
however, given that the punicalagin A and B concentrations found
in the 100% juices ranged from 100.97 to 237.78 mg/L and 123.29
to 278.06 mg/L, respectively, the actual pomegranate content in
this beverage amounts to no more than 2%. Unlike the chromatograms
for the 100% juice samples, the most predominate feature
in this chromatogram was a peak that eluted at 7.52 min. The
UV–VIS spectrum of this peak (kmax 328, 300 sh, 247 nm) closely
resembles the spectrum of caffeic acid, suggesting that the peak
is a caffeoyl ester or chlorogenic acid type derivative.