共查询到17条相似文献,搜索用时 203 毫秒
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峨嵋岩白菜叶和根状茎总黄酮提取工艺研究 总被引:3,自引:1,他引:2
采用微波辅助提取法,以总黄酮含量为考察指标,通过单因素实验和正交试验优选出峨嵋岩白菜叶和根状茎总黄酮微波最佳提取工艺。实验结果表明,峨嵋岩白菜叶中总黄酮提取的最佳工艺条件为:乙醇浓度60%,料液比1∶30,微波时间60s/次,微波功率480W,提取次数为3次,黄酮含量为15.181mg/g;根状茎中总黄酮最佳工艺条件为:乙醇浓度60%,料液比1:20,微波时间75s/次,微波功率480W,提取次数为2次,黄酮含量为2.066mg/g。峨嵋岩白菜叶中总黄酮含量较根状茎中丰富,微波辅助提取法适合峨嵋岩白菜有效成分的提取。 相似文献
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研究了微波辅助提取3种贯众属植物中总黄酮的最佳提取工艺.考察了微波辐射时间、微波功率、乙醇浓度及其料液比等因素对提取率的影响,在单因素试验的基础上进行正交试验优化工艺为:料液比为1,30(g/mL),乙醇浓度为80%.微波功率为800W,微波处理时间为8min,在此条件下,总黄酮提取率可达到0.623%.比较不同地区3... 相似文献
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Xinsheng Wang Yanfang Wu Guangyun Chen Wei Yue Qiaoli Liang Qinan Wu 《Ultrasonics sonochemistry》2013,20(3):846-854
The present study reports on the extraction of phenolic compounds from sparganii rhizome. Box–Behnken Design (BBD), a widely used form of response surface methodology (RSM), was used to investigate the effect of process variables on the ultrasound-assisted extraction (UAE). Three independent variables including ethanol concentration (%), extraction time (min) and solvent-to-material ratio (mL/g) were studied. The results showed that the optimal UAE condition was obtained with an ethanol concentration of 75.3%, an extraction time of 40 min and a solvent-to-material ratio of 19.21 mL/g for total phenols, and an ethanol concentration of 80%, an extraction time of 33.54 min and solvent-to-material ratio of 22.72 mL/g for combination of ρ-hydroxybenzaldehyde, ρ-coumaric acid, vanillic acid, ferulic acid, rutin and kaempferol. The experimental values under optimal conditions were in good consistent with the predicted values, which suggested UAE is more efficient process as compared to solvent extraction. 相似文献
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制备了附载有五硫代-15-冠-5(PT15C5)的反相微孔树脂固相萃取柱,并研究了其对钯的固相萃取,含钯样品以0.1mol/L的盐酸介质过柱,样品溶液中的钯可定量吸附在小柱上,富集完后用0.5mol/L的硫脲洗脱小柱上富集的钯,可实现钯的高倍数富集和干扰离子的分离。洗脱液中的钯可用火焰原子吸收光谱法测定,钯浓度在0.1—3.0μg/mL内与吸光度成良好的线性关系;方法用于环境水样中钯的实际测定,相对标准偏差在3.2%—4.1%之间,加标回收率在87.8%—104.7%之间,结果令人满意。 相似文献
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利用超高效液相色谱串联质谱技术检测啤酒原料麦芽中的赤霉酸(Gibberellic acid,GA3)。样品由乙腈/水(80/20)提取后,经Oasis MAX固相萃取柱净化,以甲醇-甲酸水为流动相,梯度洗脱下,经选择离子模式(SIR)检测。结果表明,赤霉酸在ACQUITY UPLCTMBEH C18色谱柱上(2.1mm×100mm,1.7μm)得到较好分离,回收率为70%—78%,检出限0.6μg/L,RSD≤8.9%,该方法适用于麦芽等复杂体系中微量赤霉酸的检测。 相似文献