Antioxidant Activity Herbal Tea Combination of Seaweed (Eucheuma cottonii) and Ginger Rhizome (Zingiber officinale)

Seaweed (Eucheuma cottonii) and ginger rhizome (Zingiber officinale) are known to have antioxidant activity. Currently, herbal tea is widely consumed by the public. This study aims to determine the antioxidant activity of herbal tea combining seaweed and ginger rhizomes. Antioxidant activity testing was carried out using the DPPH method. The test was carried out by individually measuring the antioxidant activity of seaweed herbal tea and ginger rhizome and then combined. The antioxidant activity of seaweed herbal tea and ginger rhizome was measured using a UV-Vis spectrophotometer with a concentration series of 12.5; 25; 50; 100; and 200 ppm. The test results showed that the IC50 value for seaweed was 136.43 ppm, ginger rhizome 84.58045 ppm, the combinations of seaweed rhizome and ginger 2:1, 1:1 and 1:2 respectively are 90.47571 ppm, 75.65193 ppm and 58.99158 ppm. The antioxidant activity herbal tea combinations of seaweed and ginger rhizome are in the strong category.