核桃楸乙醇提取物的稳定性  

Stability of Alcohol Extracts from Juglans mandshurica

作　　者：孙墨珑[1] 王艳梅[1] 宋湛谦 方桂珍[1] 

机构地区：[1]东北林业大学,哈尔滨150040 [2]中国林业科学研究院林产化学工业研究所

出　　处：《东北林业大学学报》2008年第5期53-54,共2页Journal of Northeast Forestry University

基　　金：哈尔滨市留学回国人员基金项目(2005AFLXJ005)

摘　　要：采用常规提取法浸提核桃楸叶、树皮和外果皮,以胡桃醌降解率作为评价指标（胡桃醌测定采用高效液相色谱法）,考察温度、pH值和光照等因素对核桃楸乙醇提取物稳定性的影响：随着温度升高,核桃楸乙醇提取物中的胡桃醌降解率增大,稳定性降低;pH值在4-8之间时,核桃楸乙醇提取物稳定性好,pH=2和pH=10时,稳定性差;温度升高或pH值变化时,核桃楸乙醇提取物中的胡桃醌降解具有一级反应的特征;强光照射时,核桃楸乙醇提取物稳定性差,胡桃醌降解具有零级反应的特征。核桃楸树皮乙醇提取物的稳定性大于核桃楸叶,核桃楸叶乙醇提取物的稳定性大于核桃楸外果皮。The effects of extraction temperature, pH value and light intensity on the stability of the alcohol extracts from the leaves, bark and green peel of Juglans mandshurica Maxim. were studied using the degradative rate of jug, lone determined by HPLC method as the evaluation index. Results show that the stability of the extracts decreases and the degradative rate of jug, lone increases with extraction temperature increasing. The stability of the extracts is poorer at pH value of 2 or 10, while it is better at pH values ranging from 4 to 8. The degradation of juglone is characterized by first-order reaction at varying pH values and increasing temperatures. The stability of the extracts is weak under high light intensity, and the degradation of juglone is characterized by zero-order reaction. The stabilities of the extracts show bark 〉 leaves 〉 green peel.

关 键 词：核桃楸 提取物 稳定性 胡桃醌 

分 类 号：TQ91[化学工程]