超临界二氧化碳萃取天津冬菜中呈色物质的初步研究

Primary Study on Extraction of Present-color Materials from Tianjin-Dong Cai, a Kind of Chinese Pickle,Tianjin, by Supercritical CO_2 and Water as Cosolvent

以超临界CO2为溶剂提取天津冬菜中的呈色物质。选用L9(34)正交表,以萃取物A550吸光度平均值为指标,分别考察有无夹带剂存在时,温度、压力、CO2流量对萃取效率的影响。结果表明:压力与温度是萃取的主要影响因素;以水作为夹带剂可有效提高天津冬菜中呈色物质的萃取效率。

This paper is focused on extraction of present-color materials in Tianjin-DongCai by supercritical CO2. Afterorthogonal experiments L9(34), we studied the influences of cosolvent, temperature, pressure, flow rate of CO2 on extraction rateof present-color materials in Tianjin-DongCai, measuring by A550 of extraction. Results show that: pressure and temperature aremain influence factors in the process; and water as cosolvent can improve the efficiency of extraction of present-color materials.