摘要
采用改性凹土吸附银杏叶总黄酮,通过对4种不同改性凹土的筛选,发现壳聚糖改性凹土对银杏叶总黄酮有较大的吸附量,为112.70mg/g;对壳聚糖改性凹土对银杏叶总黄酮的吸附性能进行研究,得到溶液总黄酮质量浓度、pH值对吸附量的影响趋势曲线、吸附等温线、吸附动力学曲线及吸附速率曲线;以解吸率、总黄酮纯度为指标对洗脱剂进行选择,发现1%乙酸-70%乙醇溶液洗脱较好,解吸率为91%,纯度为56%。
Modified attapulgite clay as an adsorbent was used to explore the adsorption properties of the total flavonoids from Ginkgo biloba leaves.Four different kinds of modified attapulgite clay were investigated for their adsorption capacities towards the total flavonoids,and chitosan-modified attapulgite clay was found to have the largest adsorption capacity,which was up to 112.70 mg/g.The adsorption properties of the total flavonoids on chitosan-modified attapulgite clay were explored,and the curves showing the respective effects of sample concentration and pH on the adsorption capacity of the total flavonoids on chitosanmodified attapulgite clay and the adsorption isothermal curves and kinetic curves were plotted.The optimal desoprtion solvent for achieving both high desorption rate （91%） and total flavonoid purity （56%） was composed of 70% ethanol and 1% acetic acid.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第17期47-50,共4页
Food Science
关键词
改性凹凸棒土
银杏叶总黄酮
吸附性能
modified attapulgite clay
total flavonoids from Ginkgo biloba leaves
adsorption properties
