To investigate the residue situation of pesticides in ginseng, total 17 samples of ginseng-growing soil, ginseng roots and ginseng seeds were collected from 5 regions of Fusong County, and the contents of organochlorine pesticide residues in the samples were detected by using ultrasonic-assisted extraction and gas chromatography with acetone-ligroin as the solvent, thereby providing suitable recommendations and scientific basis for the selection of ginseng-growing soil.
目的:优化草本水杨梅多酚的超声提取工艺,并研究其抗氧化活性。方法:以草本水杨梅为原料,采用超声辅助法提取草本水杨梅多酚,在单因素试验基础上,采用三因素五水平的响应面试验,优化工艺参数。结果:草本水杨梅最佳提取工艺条件为乙醇浓度33.76%,超声提取时间36.94 min,液固比为201.78 m L·g^(-1),在此条件下草本水杨梅多酚提取率为9.67%;三因素对草本水杨梅多酚提取率影响主次顺序为乙醇浓度>超声提取时间>液固比。并以水溶性VC和BHT为对照物,通过DPPH自由基清除法和总还原力法对草本水杨梅多酚的抗氧化活性进行了体外评价,发现在一定范围内草本水杨梅多酚的清除DPPH自由基能力和总还原能力均随多酚浓度的增加而上升。结论:由响应面法优化得到的草本水杨梅多酚的提取工艺方便可行,得到的草本水杨梅多酚具有较强的抗氧化活性,为草本水杨梅资源的开发与利用奠定了基础。
