This DPPH assay is conducted to assess the percentage of radical scavenging activity of the extracts. It does not involve the use of standards such as ascorbic acid or quercetin. The results will be obtained in the form of percentage ± SEM. For a detailed method, please refer to the link provided, which can also be used for citation purposes.
link: https://www.researchsquare.com/article/rs-4336474/latest