Figure 1.
Chromatograms of: (a) standard solution of WP (each of 150 μg/mL), (b) Zonar milk serum dairy beverage (Z-4) and (c) Zonar milk serum dairy beverage (Z-4) with addition of WP standard mixture (each of 250 μg/mL) in ratio 1:1, (v/v).
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