CN108379174A - 一种五指山参提取物在制备抗氧化剂中的应用 - Google Patents
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Abstract
本发明公开了一种五指山参提取物在制备抗氧化剂中的应用。本发明提供的五指山参作为天然的植物资源,无毒副作用,可作为良好的抗氧化剂,应用于食品和化妆品中,极大地拓展了五指山参的应用价值。本发明五指山参的提取方法除乙醇外,不添加对人体有毒副作用的试剂,安全性高,提取物具有良好的抗氧化活性,DPPH自由基清除率为47.95%,相当于0.012mg/mL抗坏血酸的DPPH清除能力。
Description
技术领域
本发明涉及中药材技术领域,更具体地涉及一种五指山参提取物在制备抗氧化剂中的应用。
背景技术
五指山参为锦葵科秋葵属植物箭叶秋葵(Abelmoschus Sagittifolius(Kurz)Merr.)的根茎,其别名红花马宁,一年生或多年生亚灌木状草本植物,主要分布于越南、缅甸、泰国、老挝以及中国的海南、广西等地,是海南特色黎药,收录于《黎族药志》。黎族民间称其为“五指山参”(黎话为“紫哈”),是海南岛黎族常用的黎药,多野生或种植于黎族聚集地的山边田地、山坡林下及林缘较为阴湿地带。因其掌状叶3-5裂,根形似人参,故称五指山参,可入药,其性微温味甘淡,长期服用无毒副作用,可以提神醒脑,滋养强身,也可以治疗神经衰弱、头晕、胃痛、腰腿痛、腹泻等,外用作祛瘀消肿、跌打扭伤和接骨药。越南北部以根作止痢和滋补药。五指山参其常作为人参的伪品,所以自身价值常被忽略,关于其研究鲜见报道。
因此开发研究五指山参其它新的用途,充分开发五指山参的实际应用,具有十分重要的经济价值。
发明内容
本发明旨在克服上述现有技术对五指山参本身开发研究的不足,提供一种五指山参提取物在制备抗氧化剂中的应用。本发明揭示了五指山参的新应用,在天然抗氧化剂的制备上添加了新品种。
为解决上述技术问题,本发明所采用的技术方案是:
一种五指山参提取物在制备抗氧化剂中的应用。
五指山参具有抗氧化活性是因为其能清除自由基。人体因为与外界的持续接触,包括呼吸(氧化反应)、外界污染、放射线照射等因素不断的在人体体内产生自由基。科学研究表明,癌症、衰老或其它疾病大都与过量自由基的产生有关联。所以具有抗氧化活性的物质可以作为一种保健品或化妆品,对人类的健康有着重大的益处。且五指山参提取物作为天然的抗氧化剂,在市场中有着无比的优势。
优选地,所述五指山参提取物的提取方法为:将五指山参粉碎后得五指山参粉末,以1g:50mL的比例加入提取溶剂,置60~90℃水浴加热回流2~3小时,放冷,过滤,蒸发浓缩,即得五指山参提取物。
优选地,所述加热回流时间为2.5h。
优选地,所述加热回流温度为90℃。
优选地,所述溶剂为70%乙醇。除乙醇外,本方法不添加对人体有毒副作用的试剂。
优选地,所述五指山参粉末粉碎后过24目筛。
优选地,所述抗氧化剂中五指山参提取物的含量为10mg/mL。
五指山参提取物具有良好的抗氧化活性,五指山参提取物10mg/mL的DPPH(1,1-二苯基-2-三硝基苯肼)自由基清除率为47.95%,相当于0.012mg/mL抗坏血酸的DPPH清除能力。五指山参作为天然的植物资源,无毒副作用,可作为良好的抗氧化剂,应用于食品和化妆品中。
DPPH法于1958年被提出,广泛用于测定生物试样和食品的抗氧化能力。此法是根据DPPH自由基有单电子,在517nm处有一强吸收,其醇溶液呈紫色的特性。当有自由基清除剂存在时,由于与其单电子配对而使其吸收逐渐消失,其褪色程度与其接受的电子数量成定量关系,因而可用分光光度计进行快速的定量分析。
与现有技术相比,本发明的有益效果是:
本发明提供的五指山参作为天然的植物资源,无毒副作用,可作为良好的抗氧化剂,应用于食品和化妆品中,极大地拓展了五指山参的应用价值。本发明五指山参的提取方法除乙醇外,不添加对人体有毒副作用的试剂,安全性高,提取物具有良好的抗氧化活性,DPPH自由基清除率为47.95%,相当于0.012mg/mL抗坏血酸的DPPH清除能力。
附图说明
图1为标准曲线。
图2为抗坏血酸的DPPH清除率曲线。
具体实施方式
下面结合具体实施方式对发明作进一步的说明,但实施例并不对本发明做任何形式的限定。除非另有说明,本发明实施例采用的原料试剂为常规购买的原料试剂。
实施例1
一种五指山参提取物在制备抗氧化剂中的应用,其中五指山参提取物的提取方法为:将五指山参干燥后用打粉机粉碎,过2号筛(24目),备用;取五指山参粉末1g,加入70%乙醇50mL,置90℃水浴加热回流2.5小时,放冷,过滤,蒸至无乙醇味,转移至100mL容量瓶,加水至刻度,摇匀,即得。
DPPH自由基清除实验:
(1)溶液配制
DPPH溶液:取DPPH 10.0mg,精密称定,加乙醇溶解,转移至100mL的容量瓶中,加乙醇至刻度,摇匀,制成每1mL含DPPH(1,1-二苯基-2-三硝基苯肼)0.1mg的乙醇溶液,避光保存。
抗坏血酸溶液:取抗坏血酸5.0mg,精密称定,加水溶解,转移至50mL的容量瓶中,加水至刻度,摇匀,制成每1mL含抗坏血酸0.1mg的溶液。
(2)反应体系与条件
照表1反应体系,精密量取五指山参提取物、DPPH溶液和抗坏血酸溶液,置25mL具塞比色管中,摇匀,置30℃水浴保温20min,取出,置冰水浴中冷却5min,取出。以自身对照管为空白,在517nm的波长处测定吸光度,分别得到自身吸收、空白对照、反应吸收。并按公式计算清除率。
表1反应体系
其中清除率的计算公式为:
Ai为样品反应管测定结果;Aj为自身吸收管测定结果;Ac为空白对照管测定结果。
方法学考察
(1)线性关系的考察
分别精密量取DPPH溶液1、2、4、6、8mL置于10mL容量瓶中,加乙醇定容至刻度,摇匀,分别制得0.01mg/mL、0.02mg/mL、0.04mg/1mL、0.06mg/1mL、0.08mg/1mL的DPPH溶液。根据表1中的空白对照管进行操作,测定吸光度。以吸光度为纵坐标,DPPH浓度为横坐标,拟合得到线性回归方程y=12.339x-0.0035,R2=0.9992。表明DPPH在0.0097~0.776mg/1mL范围内与吸光度呈良好的线性关系,符合定量要求,结果如表2及图1。
表2线性关系考察结果
DPPH浓度(mg/mL) | 0.0097 | 0.0194 | 0.0388 | 0.0582 | 0.776 |
吸光度(A) | 0.117 | 0.239 | 0.477 | 0.699 | 0.964 |
(2)精密度考察
取五指山参提取物按表1中样品反应管操作,重复测定6次吸光度,计算RSD值为0.08%,表明仪器精密度良好,符合定量要求,结果如表3。
表3精密度考察结果
编号 | 1 | 2 | 3 | 4 | 5 | 6 | RSD(%) |
吸光度(A) | 0.666 | 0.666 | 0.667 | 0.667 | 0.667 | 0.667 | 0.08 |
(3)重复性考察
取五指山参提取物按表1中样品反应管操作,测定吸光度(Abs),计算RSD值为0.96%,说明重复性良好,符合定量要求,结果如表4。
表4重复性考察结果
编号 | 1 | 2 | 3 | 4 | 5 | 6 | RSD(%) |
清除率 | 48.16 | 48.40 | 47.68 | 47.92 | 47.68 | 47.84 | 0.96 |
(4)稳定性考察
取五指山参提取物按表1中样品反应管操作,在0、2、4、8、12、24小时测定吸光度,计算RSD值为0.96,说明稳定性良好,符合定量要求,结果如表5。
表5稳定性考察结果
编号 | 1 | 2 | 3 | 4 | 5 | 6 | RSD(%) |
清除率 | 47.76 | 47.76 | 48.16 | 48.24 | 48.32 | 48.40 | 1.07 |
阳性对照样品的抗氧化活性
分别精密量取1.0mg/mL的抗坏血酸溶液1、2、4、6、8mL置于10mL容量瓶中,加蒸馏水定容至刻度,摇匀,分别制得0.1mg/mL、0.2mg/mL、0.4mg/mL、0.6mg/mL、0.8mg/mL的抗坏血酸溶液,避光密封备用。将上述抗坏血酸溶液,按表1中阳性对照管进行操作,测定吸光度,按公式计算DPPH的清除率。
表6抗坏血酸抗氧活性结果
结果表明:五指山参提取物(10mg/mL)的DPPH自由基清除率为47.95%,相当于0.1230mg/mL抗坏血酸的DPPH清除能力,说明五指山参提取物具有良好的抗氧化活性。
Claims (7)
1.一种五指山参提取物在制备抗氧化剂中的应用。
2.如权利要求1所述应用,其特征在于,所述五指山参提取物的提取方法为:
将五指山参粉碎后得五指山参粉末,以1g:50mL的比例加入溶剂,置60~90℃水浴加热回流2~3小时,放冷,过滤,蒸发浓缩,即得五指山参提取物。
3.如权利要求2所述应用,其特征在于,所述加热回流时间为2.5h。
4.如权利要求2所述应用,其特征在于,所述加热回流温度为90℃。
5.如权利要求2所述应用,其特征在于,所述提取溶剂为70%乙醇。
6.如权利要求2所述应用,其特征在于,所述五指山参粉末粉碎后过24目筛。
7.如权利要求1所述应用,其特征在于,所述抗氧化剂中五指山参提取物的含量为10mg/mL。
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