Phenolic, flavonoid, ascorbic acid quantification and DPPH radical scavenging activity of commerical South African teas.

This dataset includes the results of a study which investigated the quantities of different antioxidant compounds such as phenolics, flavonoids and ascorbic acid in commercially available black, green, rooibos and moringa tea brands in South Africa. It further examined the antioxidant activity of these teas based on their ability to scavenge the free radical, DPPH. The study was conducted in a controlled laboratory environment using teabags of the selected tea brands from which hot water aqueous extracts were prepared followed by chemical analysis. The dataset contains measurements of how much phenolic, flavonoid and ascorbic acid was present in each tea type, and the activity of each against DPPH.

本数据集涵盖一项研究的全部成果：该研究针对南非市售的红茶、绿茶、路易波士茶及辣木茶品牌，测定了其中酚类（phenolics）、黄酮类（flavonoids）与抗坏血酸（ascorbic acid）等多种抗氧化化合物的含量；同时基于各茶样清除自由基DPPH的能力，考察了其抗氧化活性。本研究于可控实验室环境中开展，采用所选茶品牌的茶包制备热水水提物，随后进行化学分析。本数据集包含各茶类中酚类、黄酮类及抗坏血酸的含量测定结果，以及各茶样针对DPPH的抗氧化活性数据。