【摘要】 用超临界CO2从除虫菊干花中萃取的除虫菊素,这种膏状物不能直接用来加工或深加工杀虫产品。用于家庭和大田的杀虫剂加工时,必须把里面大部分的杂质如蜡质、脂肪酸酯、色素等除去。纯化后的精菊油含有50%~70%除虫菊素,外观为淡黄色流动液体,符合FAO/WHO标准。更多还原

【Abstract】 Extracted pyrethrins from pyrethrum dried flower by super critical CO2 .is a paste called oleoresin which isn’t suitable to formulate insecticidal products either use in household or crops.A large part of impurities e.g.waxes and pigments have to be moved out.The commercial extracts containing 50%~70% pyrethrins are yellow pale which complies with FAO/WHO specification.更多还原