2014•Unpublished venueRequires access
Primary Exploration of the Extraction Conditions of the Antioxidant from Piper nigrum Linn.Leaves
Zhang Shui-pin
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Abstract
It was ascertained that the ethanol extraction phase and the water extraction phase possess the stronger activity of the DPPH free radical scavenging capacity and the higher levels of polyphenol content by the way of the system solvent extraction.It was concluded that older leaves had stronger antioxidant activity by comparing DPPH free radical scavenging capacity and polyphenol content of the tender leaves,the complete stability lobe and the old leaves.The solution from extraction using 50% ethanol water had stronger activity of free radical scavenging capacity and higher levels of polyphenol content(5.4 g/100g) and flavonoids content(0.8 g/100g) through room temperature agitation leaching using ethanol water with different concentration.