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投稿时间:2018-07-26
投稿时间:2018-07-26
中文摘要: 以‘蓝鸟’睡莲(Nymphaea‘Blue Bird’)花露为材料,采用液相色谱-质谱(liquid chromatograph-mass spectrometer,LC-MS)法,分析睡莲花露的主要成分,同时采用1,1-二苯基-2-三硝基苯肼(1,1-dipheny1-2-picrylhydrazyl ,DPPH)法、铁离子还原/抗氧化能力(ferric reducing ability of plasma,FRAP)法、总抗氧化能力(total peroxyl radical-trapping antioxidant parameter,TRAP)法测定睡莲花露的抗氧化能力。代谢成分分析结果表明,睡莲花露的主要成份有葡萄糖酸、马来酸甲麦角新碱,单半乳糖甘油二酯,硫代异鼠李糖甘油二酯、1-十六酰-SN-丙三醇-磷酸胆碱、东莨菪内酯、威严仙皂苷C、葡萄糖醛酸、槲皮素、肌醇半乳糖苷和香豆素等多种物质。抗氧化能力测试表明,DPPH 法中350 μL 睡莲花露的自由基清除率为(85.19±1.55)%;FRAP 法中测定的睡莲花露抗氧化能力相当于6.35 mmol/L 的FeSO4 的抗氧化能力;TRAP 法中花露加入量与TRAP 值呈线性相关,5 μL 的睡莲花露加入量其抗氧化能力相当于1.425 2 mmol/L 的抗坏血酸钠。
Abstract:The main components of the stigmatic exudate of Nymphaea'Blue Bird'were analyzed by the LC-MS method with MS-Dial software,and three methods of DPPH(1,1-dipheny1-2-picryl-hydrazyl),FRAP(ferric reducing ability of plasma)and TRAP(total peroxyl radical-trapping antioxidant parameter)were used to determine the antioxidant capacity of waterlily stigmatic exudate. Results showed that the waterlily stigmatic exudate was composed of D-gluconic acid,methergine,monoglycosyldiglycerides,sulphoquinovosyldiglyceride,lysoPC 18:2,7-hydroxy-6-methoxychromen-2-one,cauloside C,glucuronic acid,quercetin,coumarin and other metabolites.The results of the antioxidant capacity showed that the free radical scavenging activity of 350 μL waterlily stigmatic exudate was (85.19±1.55)%by the DPPH method.The antioxidant capacity of waterlily stigmatic exudate was equivalent to the antioxidant capacity of 6.35 mmol/L FeSO4 by FRAP method. In the TRAP method,the amount of stigmatic exudate was linearly correlated with the TRAP value,and the antioxidant capacity of 5 μL stigmatic exudate was equivalent to 1.425 2 mmol/L ascorbic acid.
keywords: waterlily stigmatic exudate metabolites antioxidant capacity 1,1-dipheny1-2-picryl-hydrazyl(DPPH)method ferric reducing ability of plasma(FRAP)method total peroxyl radical-trapping antioxidant parameter(TRAP)method
文章编号:201908019 中图分类号: 文献标志码:
基金项目:海口市重点科技计划项目(2016-022);海南省重点研发计划项目(ZDYF2017025)
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