Chemical Composition of Essential Oil and Antioxidant Activities of Curcuma petiolata Roxb. Rhizomes

Abstract:

Pulverized rhizome of Curcuma peliolata on hydrodistillation, afforded light yellow essential oil in the yield of 0.13% v/w. The chemical constituent of the essential oil was determined by GC-MS. Nine compounds representing 95.34 % of the total oil were identified. The major compounds of the oil were 2-methyl-5-pentanol, 1H-pyrrol-1-amine,2-(4-methoxyphenyl)-n,n,5-trimethyl, and curcumol. The distillated aqueous was extracted with dicloromethane (DCM), ethyl acetate (EtOAc), and n-butanol. The DPPH radical scavenging and reducing power of the extracts were investigated. Curcumin and ascorbic acid were used as standard references. The DPPH radical scavenging activity was decrease in order: curcumin ascorbic acid EtOAc extract > DCM extract > n-butanol extract > aqueous extract. The EtOAc extract showed significantly highest inhibition of the radical scavenging activity with IC₅₀ 0.092 ± 0.001 mg/mL (curcumin and ascorbic acid (IC₅₀ 0.012 and 0.013 mg/mL, respectively (P<0.05)). While, the DCM extract showed highest reducing power with IC₅₀ = 0.271 mg/mL which lower than that of standard curcumin (IC₅₀ = 0.013 mg/mL) and ascorbic acid (IC₅₀ = 0.002 mg/mL).Introduction

• Periodical: Advanced Materials Research (Volume 506)
• Pages: 393-396
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.506.393
• Online since: April 2012
• Authors: A. Thakam, N. Saewan
• Keywords: Antioxidant, Curcuma petiolata, DPPH, Reducing Power

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