摘要
以当归Angelica sinensis提取残渣为原料制备新型膳食纤维,对当归膳食纤维(angelica dietary fibre,ADF)进行了化学成分测试及产品结构特征和理化性能分析,开展新型ADF吸附胆酸钠的热力学及体外模拟对金属离子吸附率的研究。结果表明:成功获得了新型ADF,其水分含量为1.32%,蛋白质质量分数为5.47%,粗脂肪质量分数0.57%,总灰分质量分数5.24%,持水力为3.2 g.g-1,溶胀力为1.3 mL.g-1,结合水力为0.105 1 g;结构特征分析表明:ADF与当归残渣是不同的纤维;ADF对胆酸钠的最大吸附量为40μg.g-1,其吸附机制符合Freundlich模型;体外模拟条件下ADF对无机金属离子镍、铜、铅的吸附率分别为30.18,17.47和21.22 mg.g-1。所得结果可为药用植物膳食纤维研究提供有益借鉴。
A new dietary fiber was prepared by the enzyme-chemical method using the residue of Angelica sinensis as the raw material.The chemical composition,structural characteristics,and physical and chemical properties of this new A.sinensis dietary fiber（ADF） were determined and analyzed.Next,an adsorption thermodynamic equation was established between the new ADF and sodium cholate,and the adsorption rate of metal ions in vitro being determined.Results showed the new ADF with the following characteristics： ADF moisture content was 1.32%,protein was 5.47%,crude fat was 0.57%,total ash was 5.24%,ADF water holding capacity was 3.2 g·g-1,swelling property was 1.3 mL·g-1,and water binding capacity was 0.105 1 g.The structural feature analysis demonstrated that ADF and the angelica residue were not the same fiber type.Maximum ADF adsorption on sodium cholate was 40 μg·g-1 with the absorption mode corresponding to the Freundlich model.Also,the ADF adsorption rate for selected inorganic metal ions（in mg·g-1） was nickel was 30.18,copper was 17.47,and lead was 21.22.Thus,this study could provide helpful references for dietary fiber in medicinal plants.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2013年第4期552-560,共9页
Journal of Zhejiang A&F University
基金
浙江省科研创新资助项目(101109)
关键词
中草药学
当归膳食纤维
产品表征
吸附机制
吸附率
Chinese herbology
Angelica sinensis dietary fiber
product structural characteristics
adsorption mode
adsorption rate
