回流提取

结果：提取最佳工艺以70%乙醇做溶媒，回流提取2次，每次2h。

Results : the best extraction technique was : solvent was 70 % alcohol , reflux extraction for two times , and each time for 2h .

采用回流提取和D-101型大孔树脂从甘草中提取和纯化甘草酸。

Reflux extraction method and D-101 type of macroporous resin were used to extract and purify glycyrrhizic acid from liquorice .

优化提取条件为4倍量的85%乙醇提取液，回流提取2次，每次3h为最佳提取工艺。

The optimal conditions were obtained by reflux exaction using 85 % alcohol for 3 h twice .

结果与传统乙醇回流提取方法比较，乙醇浓度由80%降低至65%，提取时间由2h缩短至0.75h。

Results The concentration of alcohol was lower and extracting time was shorter than the traditional method .

用80%的甲醇溶液回流提取烟叶中的多酚物质，然后用WatersSEP-Park-C（18）固相萃取柱分离脱脂；

Polyphenols can be extracted from tobacco leaf with 80 % methanol by heating circumfluence , then subjected to degrease by Waters Sep-Park-C18 solid phase extraction cartridge .

以70%乙醇为溶剂，回流提取，在全自动扫描或手动分光光度计上测定，得平均回收率：UV－260为99.7%，RSD为0.22%；

The sample was refluxed and extracted with a solvent 70 % alcohol and determined by full-automatic scanner or a hand spectrophotometer .

得出了总黄酮提取的适宜条件为50%乙醇回流提取4h。

The optimal procedure of extracting total flavonoids was reflux for 4 hours with 50 % ethanol as solvent .

结果：西洋参乙醇提取的最佳条件为12倍量70%乙醇回流提取2次，每次提取3h。

Results : The optimum alcohol-extracting procedure was determined as 12 times of 70 % alcohol refluxing and extracting 3h for 2 times .

结果最佳提取工艺为金银花粉末用12倍量90%的乙醇回流提取3次，每次1h。

Results The optimum extracting technical conditions were as follows : 12 times of90 % alcohol , refluxing 3 times and one hour each time .

实验结果表明超临界CO2萃取和水蒸汽回流提取的杜香挥发油的主要组分基本相同，但超临界CO2萃取法得到的组分相对多一些；

The experimental results showed that the supercritical CO2 extraction can get more components in volatile oil than the method of vapor refluence , but most of the components were the same .

8倍量60%乙醇回流提取1h，提取4次，总黄酮含量为0.4%。

Smilax glabra was refluxed and extracted for one hour per time with 60 % alcohol as much as 8 times the weight of the medicinal materials for four times .

结果：正交实验结果表明，用12倍量60%乙醇回流提取3次，每次2h为最佳工艺。

Results : It showed that the optimum choice was : 12 times of 60 % ethanol adding amount , 2 hour of each extraction for tow times .

结果乙醇回流提取法最好，且以50%乙醇按1∶50的料液比、在100℃回流提取3h的方法提取，得到的打箭菊中的总黄酮含量最高。

Results The optimum extracting condition was as follows : 50 % ethanol , solid-liquid ratio 1 ∶ 50 and refluxing and extracting for 3 h at 100 ℃ .

蓖麻粕经甲醇80℃水浴回流提取，提取时间在2h之后蓖麻碱的得率保持稳定。

The caster bean meal was refluxed with methanol in a water bath at 80 ℃ and a stable yield of ricinine was found after 2 hours of extraction .

结果：优选的提取工艺条件为：人参用9倍量60%的乙醇回流提取3次，每次2h。

Results : The optimum extraction condition obtained was : adding 9 times amount of 60 % alcohol and extracting for 2 hours ( totally extracting for 3 times ) .

结果：最佳工艺条件为采用6倍量80%乙醇回流提取2次，每次2h。

Result : The best extracting technical conditions were as follows : 6 times of amount of 80 % alcohol , extracted for 2 times , each time for 2 hours .

结果：药材以8倍80%的乙醇加热回流提取1.5h。

Results : The ideal extraction process is : extracted with 8 times amount of 80 % alcohol , heated refluxed 1.5 h.

用回流提取法制备同一来源、不同月份柿叶样品，采用RP-HPLC法，以芦丁为对照品，测定同一年中5月到11月7份样品中芦丁的含量。

Rutin in the leaves of persimmon from May to November in different seasons were extracted by method of reflux extraction and their contents were determined by means of RP-HPLC with rutin as a standard .

采用超微回流提取方法提取土豆叶中的茄尼醇，用高速逆流色谱（HSCCC）对粗提物中的茄尼醇进行分离纯化。

Preparative high-speed counter-current chromatography ( HSCCC ) was used for the isolation and purification of solanesol from potato leaves .

结果表明，提取魔芋中总生物碱较佳的工艺条件是：在pH值为2～3的酸性醇溶液中，回流提取3h，总生物碱的含量可达0.39%。

The results showed that the better technical conditions to extract the whole alkaloid with the acidity alcohol which pH statistic from 2 to 3 , and extract it 3 hours , then the concentration in alkaloid is 0.39 % .

结果表明：样品先用正己烷在超过90℃脱脂10h，然后用80%甲醇在80℃加热回流提取。

The soybean product was degreased by n-hexane at above 90 ℃ for 10 h , then extracted with 80 % methanol at 80 ℃ .

结果：蔓荆子药材粗粉，用20倍量的95%乙醇作提取溶剂，回流提取3次，每次1h为最佳工艺。

Results : The best extraction technology conditions were as follows : the material was pulverized , refluxed three times of one hour each , and 95 % ethanol aqueous solution was used as extraction solvent .

采用正交试验设计确定中药黄芪总皂苷的最佳提取工艺条件为：加8倍量70%乙醇，回流提取3次，每次提取2h。

Orthogonal design to confirm the total saponins of astragalus traditional optimal extraction process conditions for : add 8 times is 70 % ethanol refluxing extraction , each time , three times 2h extraction .

结论最优提取工艺是：50%乙醇溶液、8倍体积、85℃回流提取2次，每次2h。

Conclusion The optimum extraction process was achieved : the addition of 50 % alcohol ( 8 times raw herb in volume ) into materials , refluxing and extracting for 2 times at 85 ℃ .

得出制剂的最佳提取工艺为60%的乙醇10倍量，回流提取2次，每次1.5h。

The optimal extraction process is as follow : 10 times of 60 % alcohol , 2 times of extraction and 1.5 hours for each extraction .

优选的补骨脂提取工艺为：补骨脂药材依次用8倍量、7倍量60%乙醇回流提取两次，每次1.5h。

Optimal extraction process of psoralen : using 8 times , 7 times the amount of 60 % of ethanol extracted twice , each 1.5 hours .

结果3种提取方法中回流提取的提取物中岩白菜素含量最高，正交实验优化条件为：料液比为1：15，提取时间为1.5h，提取次数1次。

ResultsThe optimum parameters of extracting bergenin were as follows : extracting for1.5 hours , one time , and1:15 of the ratio of material and solvent .

取各待试中药材20g，分别用80%乙醇热回流提取的方法制备中药总提取物，制成200mg/ml药液，用于体外杀螨实验，筛选出杀螨活性强的中药材为有效中药材；

20g of each candidate were extracted with 80 % ethanol by heat under reflux , and then prepared to be concentration of 200mg / ml and used into mite-killing experiment ;

确定了远志提取纯化工艺条件：药材用10倍量60%乙醇回流提取2次，每次2.5h。

The optimum conditions of extraction process were 60 % ethanol , 2.5 hours for reflux , 10-fold solvent and 2 times for extraction .

用体积分数95%的乙醇为溶剂，采用索氏提取、回流提取和冷浸提取时，所得提取物对TMV的抑制率均为100%。

The inhibition rate on TMV of the extract from lotus leaves with 95 % ( V / V ) ethanol by Soxhlet extractor , reflux and cold soak are all 100 % .