A comparative study on yield of extract, chemical marker content and antioxidant activity of Zingiber zerumbet and Zingiber officinale

摘要

Zingiber officinale (ZO) and Zingiber zerumbet (ZZ) are widely found in Southeast Asia and commonly used in herbal medicine practice for treating various diseases. This study was aimed to evaluate the yield of extract, chemical marker content and antioxidant activity of these Zingeberaceae species. Essential oils and hydrosols were obtained using turbo-extraction-distillation (TED). The highest yield of essential oil was obtained by the ZZ sample, which was 0.35 ± 0.09%, while the ZO showed the lowest yield (0.17 ± 0.02%). In hydrosol extracts the highest yield was obtained by the water extract of ZZ (2.50 ± 0.78%), while the ethanol/water (30:70) extract of ZO showed the lowest yield (0.90 ± 0.15%). The analysis of chemical marker content of ZO and ZZ showed 6-gingerol and zerumbone as the major component, respectively. The DPPH method showed the highest antioxidant activity for ZO essential oil (129.4 ± 14.47%), followed by ZZ essential oil (78.88 ± 9.35%) and hydrosol extracts. Collectively, these findings suggest that both ZO and ZZ can be used as potential sources of natural antioxidant in foods and herbal medicines.