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以猪苓为原料,通过二次回归正交试验优化了猪苓多糖的提取工艺条件.结果表明:影响猪苓多糖提取率的因素顺序为:提取温度>料液比>pH>微波提取时间>微波功率;最佳提取工艺条件为提取时间3min,温度70.0℃,料液比1∶24.7 (g/mL),pH 6.91,微波功率400W,猪苓多糖的提取率为2.86%. 相似文献
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白僵蚕多糖成分的释放方法探讨 总被引:1,自引:0,他引:1
白僵蚕是重要的中药材,采用微波辅助法释放白僵蚕的多糖成分。以白僵蚕多糖提取率为评价指标,采用微波辅助法提取分离白僵蚕多糖,用单因素实验法对影响多糖得率的料液比、微波功率、照射时间、提取次数4个因素进行了分析,用正交试验法优化白僵蚕多糖的提取工艺条件,提取白僵蚕多糖成分的最佳条件为:料液比1∶30、微波功率480W、提取次数3次、照射时间60s。在此提取条件下白僵蚕多糖干料的提取率为11.51%。 相似文献
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建立了UV-Vis分光光度测定红枣中多糖含量的方法.考察了乙醇体积、超声温度、超声时间、料液比4因素对多糖含量测定的影响.在单因素试验结果的基础上,进行正交试验设计,试验结果表明:最佳测定条件为A2B2C3D2,即超声温度为50℃,超声时间为60min,料液比为1∶30(g/mL),乙醇用量为30mL.方法平均回收率为96.87%,RSD为1.11%(n=5).该法快速、灵敏、准确,可用于红枣多糖的提取及含量测定. 相似文献
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超声波法提取扣子七多糖.以扣子七多糖的含量为指标,先采用单因素试验获得提取扣子七多糖的最佳料液比、提取时间、提取温度.然后根据单因素实验中的实验结论设定恰当的3个水平,通过正交试验,最后获得多糖提取的最佳提取工艺.对扣子七多糖含量影响因素的大小依次是料液比、提取时间、提取温度.扣子七多糖最佳提取工艺为:料液比1∶20、提取温度60℃、提取时间20min/次. 相似文献
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The extracting technology including ultrasonic and microwave assisted extraction (UMAE) and ultrasonic assisted extraction (UAE) of lycopene from tomato paste were optimized and compared. The results showed that the optimal conditions for UMAE were 98 W microwave power together with 40 KHz ultrasonic processing, the ratio of solvents to tomato paste was 10.6:1 (V/W) and the extracting time should be 367 s; as for UAE, the extracting temperature was 86.4 °C, the ratio of the solvents to tomato paste was 8.0:1 (V/W) and the extracting time should be 29.1 min, while the percentage of lycopene yield was 97.4% and 89.4% for UMAE and UAE, respectively. These results implied that UMAE was far more efficient extracting method than UAE. 相似文献
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Hesperidin, an abundant and inexpensive bioflavonoid in Penggan (Citrus reticulata) peel, has been reported to possess a wide range of pharmacological properties. Ultrasonic extraction is an effective technique for the isolation of bioactive compounds from vegetable materials. In this study, the application of ultrasonic method was shown to be more efficient in extracting hesperidin from Penggan (C. reticulata) peel than the classical method. The effects of main ultrasonic-assisted extraction conditions on extraction yields of hesperidin from Penggan (C. reticulata) peel were evaluated, including extraction solvents, solvent volume, temperature, extraction time, ultrasonic power, ultrasonic frequency. Results showed that solvent, frequency and processing temperature were the most important factors for improving the extracting yields of hesperidin. When performed at the same temperature under the same time using three frequencies, methanol as the solvent improved the extraction yield evidently compared with ethanol or isopropanol; by comparison of the frequency influence, the yield of hesperidin was higher at 60 kHz than at 20 kHz and 100 kHz. The optimum ultrasonic conditions were determined as: methanol, frequency of 60 kHz, extraction time of 60 min, and temperature of 40 degrees C. In addition, the ultrasonic power had a weak effect on the yields of hesperidin within the experimental range. Extending ultrasonic treatment times did not result in degradation of hesperidin; the rotary beaker for materials can increase the yields of hesperidin. 相似文献
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In this study, the application of ultrasound-assisted extraction (UAE) method was shown to be more efficient in extracting anti-tumor bufadienolides (bufalin, cinobufagin and resibufogenin) from important animal medicine of ChanSu than the maceration extraction (ME) and soxhlet extraction (SE) method. The effects of ultrasonic variables including extraction solvent, solvent concentration, solvent to solid ratio, ultrasound power, temperature, extraction time and particle size on the yields of three bufadienolides were investigated. The optimum extraction conditions found were: 70% (v/v) methanol solution, solvent to solid ratio of 10ml/g, ultrasound power of 125W, temperature of 20°C, extraction time of 20min and particle size of 60-80 mesh. The extraction yields of bufalin, cinobufagin and resibufogenin were 43.17±0.85, 52.58±1.12, 137.70±2.65mg/g, respectively. In order to achieve a similar yield as UAE, soxhlet extraction required 6h and maceration extraction required much longer time of 18h. The results indicated that UAE is an alternative method for extracting bufadienolides from ChanSu. 相似文献
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从提取溶剂及提取条件等方面对柑桔皮总黄酮超声波辅助提取工艺进行优化研究.以黄酮得率为考察指标,用单因子试验对提取溶剂进行筛选,用析因试验对提取条件进行分析,通过最陡爬坡试验和中心组合设计试验,优化超声波辅助提取工艺.结果表明,乙醇和水组成的复合体系是理想的提取溶剂;液料比、提取时间、乙醇浓度、pH值都对柑桔皮总黄酮提取产生一定的影响,其中液料比和提取时间的影响最为显著.超声波辅助提取工艺优化条件为:液料比37mL/g,提取时间83min;在此条件下总黄酮的最大提取量为3.321%.经验证试验表明,该方法是一种实用的提取方法. 相似文献