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Luxembourg: European Environment Agency, Publications Office of the European Union

On-line HPLC-DPPH methods The colorimetric method of antioxidant activity by scavenging DPPH free radical possesses certain shortcomings, like failure to indicate antioxidant activity of certain drugs and interference from color pigments of natural products

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*Correspondence: Ning Liu, [email protected] Qin, [email protected] These authors have contributed equally to this work Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers