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      Improved DPPH determination for antioxidant activity spectrophotometric assay

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      Chemical Papers
      Walter de Gruyter GmbH

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          Abstract

          An improved procedure for determination of the residual DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical concentration was proposed taking into account the absorbance of both DPPH free radicals and DPPH nonradical (1,1-diphenyl-2-picrylhydrazine) stable form. The calculated residual DPPH free radical concentrations were compared with those obtained from a calibration curve and variation coefficients below 10 % were found.

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          Evaluation of antioxidant properties of pomegranate peel extract in comparison with pomegranate pulp extract

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            Screening of 70 medicinal plant extracts for antioxidant capacity and total phenols

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              The characterization of antioxidants.

              The role of antioxidants in nutrition is an area of increasing interest. Antioxidants are used (1) to prolong the shelf life and maintain the nutritional quality of lipid-containing foods, and (2) to modulate the consequences of oxidative damage in the human body. This review discusses what an antioxidant is and how the properties of antioxidants may be characterized.
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                Author and article information

                Journal
                Chemical Papers
                Walter de Gruyter GmbH
                1336-9075
                January 1 2007
                January 1 2007
                : 61
                : 3
                Article
                10.2478/s11696-007-0022-7
                9c5b78be-a220-45bc-a71c-6729d0b8a725
                © 2007
                History

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