Physicochemical characteristics of Agastache rugosa O. Kuntze extracts by extraction conditions

摘要

Fifty-seven extracts from flower, leaf and stem of Agatache rugosa O. Kuntze were prepared by varing extraction conditions: solvents (hot water, ethanol and NaCl solution); temp.(60, 80 and 100 deg C) and solvent ratios (10 to 35 times per material). Lipid content of leaf was 9.54 percent and protein content of the flower where the essential amino acids were most abundant among all parts was 16.8 percent. Among six minerals (Na, Ca, Fe, P, K and Mg) detected from all parts of the plant, the content of K was the highest. Extraction yield rated higher in oder of water, ethanol and NaCl solution, respectively and the extractions reached eqilibrium in about 15 to 20 min, regardless of extraction conditions, pH values of all extracted solvents maintained neutral upon extraction and a few free sugars in forms of glucose and fructose were detected from ethanol extracts. Colors and organoleptic characteristics of the extracts which determine the properties of final products varied with extraction conditions.