DETERMINATION OF NAPHTHOQUINONES IN THE RAW MATERIAL AND PHYTOPREPARATION OF BLACK WALNUT (JUGLANS nigra L)
A procedure was proposed for the quantification of the sum of naphthoquinones with reference to juglone and its content in the black walnut (Juglans nigra) leaves, pericarps, herbal tea, and the supplement VENOSPAS was determined using photoelectric colorimetry.