A study on a potential bioactive compound in green seaweed Chaetomorpha antennina Kützing (1847) extract as antioxidant from the Gosong Telaga Coast, Aceh Singkil

Abstract

Seaweed has considered as herbal medicine and food sources utilized by the coastal community to overcome their health problem. Aceh Singkil is one of the regency in Aceh Province that this surrounding area always be affected by oceanography phenomena such as tidal, wind, season, climate change and others. Aceh Singkil coastal area have high marine biodiversity especially seaweed. Seaweed are commonly categorized into three main classes, including Rhodophyta, Chlorophyta, and Pheophyta. Chaetomorpha antennina is one of the green seaweed that widely distributed on the Aceh coastal area. The objective of this study was to identify the potential active compound of C. antennina toward antioxidant activity. The sample of C. antennina was collected from around Gosong Telaga coastal zone. The research phase including rendement, extraction, phytochemical screening, and antioxidant activity. The data depicted the content of rendement in ethanol extract as much as 1.98%, ethyl acetate extract was 0.66%, and n-hexane extract was 1.08%. It is indicated that the ethanol extract has high rendement content than other extracts. Subsequently, green seaweed C. antennina was detected phenol, flavonoid, and steroid compounds. The cupric reducing antioxidant capacity method were obtained the ethanol extract was 44.7 umol trolox/g, ethyl acetate was 13.84 umol trolox/g, and n-hexane extract was 29.02 mmol trolox/g. Moreover, antoxidant activity with FRAP method yielded the ethanol extract value 576.50 umol trolox/g, the value of ethyl acetate as much as 500.50 umol trolox/g, and n-hexane extract value 200.50 mmol trolox/g. Based on two antioxidant activity that used in this study depicted the ethanolic crude extract have the strongest antioxidant activity than other extracts. This finding gives fruitful report for developing the marine natural product from green seaweed.