Box—Behnken响应面法优化青龙衣中胡桃醌提取工艺
2018-09-25王丽红闫勇杰赵宏宗希明张云杰
王丽红 闫勇杰 赵宏 宗希明 张云杰
摘要:目的 对青龙衣中胡桃醌的提取工艺进行优化。方法 在单因素试验基础上,选取料液比、超声提取温度和乙醇浓度为自变量,胡桃醌得率为响应值,根据Box-Behnken试验设计原理,采用响应面法对青龙衣中胡桃醌的提取工艺进行优化。结果 胡桃醌最佳提取工艺为14.30倍量89.81%乙醇,30.28 ℃恒温提取。胡桃醌得率为2.034 mg/g,与实测值1.957 mg/g偏差较小。结论 优选的提取工艺合理可行,可为提取青龙衣中的胡桃醌提供依据。
关键词:青龙衣;Box-Behnken响应面法;核桃楸;胡桃醌;提取工艺
DOI:10.3969/j.issn.1005-5304.2018.07.016
中图分类号:R283.5 文献标识码:A 文章编号:1005-5304(2018)07-0067-04
Abstract: Objective To optimize extraction process of walnut quinone from Juglans green peel. Methods On the basis of single factor tests, taking material-liquid ratio, extracting temperature and ethanol concentration as independent variables, yield of walnut quinone in response to as a value, according to Box-Behnken experiment design principle, extraction process of walnut quinone from Juglans green peel was optimized by response surface analysis. Results The optimum extraction process of walnut quinone was: 14.30 times the amount of 89.81% ethanol; 30.28 ℃ constant temperature. The extracting amount of walnut quinone was 2.034 mg/g, which was close to the experimental results of 1.957 mg/g. Conclusion The optimized extraction process is reasonable and feasible, which can provide reference for the extraction of walnut quinone from Juglans green peel.
Keywords: Juglans green peel; Box-Behnken response surface methodology; Juglans mandshurica; walnut quinone; extraction process
核桃楸Juglans mandshurica Maxim.又名胡桃楸,为胡桃科胡桃属落叶乔木,是我国珍贵木材树种[1]。核桃楸树皮、枝皮和果皮均可入药,其未成熟外果皮又称青龙衣。《中华本草》记载青龙衣“氣微,味微苦、涩。清热燥湿,泄肝明目。主治湿热下痢,带下黄稠,目赤肿痛,麦粒肿,迎风流泪,骨结核”[2]。青龙衣具有清热、解毒、镇痛、抗肿瘤等功效[3],主要含有多糖类、醌类、黄酮类及大量鞣质等化学成分,胡桃醌为青龙衣抗肿瘤的主要成分。1973年,Ota A等[4]从野核桃新鲜青皮中分离提纯出5,8-二羟基-l,4萘醌,得出青龙衣中存在萘醌的结论,至今萘醌及其衍生物已成为各地学者的研究重点[5]。
国内已有学者采用HPLC和紫外分光光度法对核桃楸青果皮、树皮和树叶中胡桃醌提取工艺进行研究,试验方法均为单因素和正交试验[6-9]。由于未对单因素选择进行优化且考察因素较少、正交试验只能处理离散型数据等缺陷,得出的提取工艺中各因素水平数值不够精确。……