查询词典 extraction

The factors included the type of extractant, the amount and the extraction times, the type of purified column, the type and dosage of eluviatant about the pre-treatment of the samples. The extraction was 3 minutes (13500rpm) of high speed homogenize extraction. 50mL acetonitrile as an extractant was acted on one time extraction. The florin silicon column was taken as the purified column. The extraction was eluted by 30ml 3:2 acetone - hexane and concentrated by nitrogen blowing under 50 °C water bath.The chromatographic separated conditions were studied applied the Agilent 6890 gas chromatographic apparatus and DB-17 capillary column(30m×0.25mm×0.25μm).

研究了提取剂种类、用量与提取次数，净化柱种类，淋洗剂种类与用量，提取方式与提取时间，柱温和柱流量等因素对油菜籽中有机磷农药残留提取、分离净化和色谱分离的影响，建立了采用高速匀浆提取方式提取3min13500rpm.min~(-1，以50mL乙腈为提取剂一次提取，以弗罗里硅柱为样品液净化柱，以30mL 3：2丙酮-正己烷为淋洗剂，在50℃水浴条件下用氮吹浓缩，气相色谱检测的油菜籽有机磷农药多种残留检测技术。

The results showed that the optimum conditions of Opuntia polysaccharides extraction were as follows: the ratio of water to material of 5.5:1, extraction temperature of 75℃ and extraction time of 2.2h, under such condition the extraction rate could be up to 0.82% at one-time extraction.

在分析各个因素的显著性和交互作用后，得出仙人掌多糖水浸提的最佳工艺条件为：水料比5.5：1，浸提温度75℃，浸提时间2.2h；浸提1次，仙人掌多糖的实际提取率可达0.81%，比单因素实验最高提取率高出5.8%。

The methods of mechanical compression, chemical extraction, soxhlet extraction and supercritical CO2 extraction were taken to extract the oil in perilla seed. With oil yielding rate of perilla seed after extraction as investigation index, the suitable extraction method for oil in perilla seed was screened.

方法］采用机械压榨法、化学萃取法、索氏提取法和超临界CO2萃取法提取紫苏子油，以紫苏子萃取后的出油率为考察指标，筛选适宜的紫苏子油的提取方法。

On the basis of the previous results and according to the central composite experimental design principles,the method of response surface method with 3 factors and 3 levels was adopted.then the factors influencing the technological parameters were determined by means of regression analysis.response surface and contour were finally graphed with the extraction rate as the response value.resultsthe optimum conditions of lycium barbarum polysaccharides extraction were as follows:the ratio of material to solvent of 1∶32,extraction temperature of 84℃ and extraction time of 2.3 h,one time extraction.conclusionthe yield of lycium barbarum polysaccharides is 11.10% under the optimum conditions.

方法在单因素实验基础上选取实验因素与水平，根据中心组合（box-benhnken）实验设计原理采用3因素水平的响应面分析法，依据回归分析确定各工艺条件的影响因子，以多糖提取率为响应值作响应面和等高线。结果在分析各个因素的显著性和交互作用后，得出枸杞多糖水浸提的最佳工艺条件为：料液比1∶32；浸提温度84℃；浸提时间2.3h；浸提1次。结论在最佳工艺条件下，枸杞多糖的实际提取率可达11.10%。

Analytical results of GC indicated that, to trichlorphon residues in Chinese Cabbage, the extraction rate of subcritical water extraction and microwave assistanted extraction is higher than that of manual shaking extraction and ultrasonic extraction.

气相色谱分析结果表明，对于大白菜中的敌百虫残留农药，亚临界水萃取和微波辅助萃取技术较手动振荡和超声萃取的萃取率更高。

Distribution ratios of complex extraction for different operation conditions were forecasted. Using mass action law, the liquid-liquid equilibrium models of complex extraction of monobasic and polybasic carboxylic acid have been successfully induced, and physical extraction were also considered in the model. On the basis of orthogonal experiments, the models of equilibrium distribution ratios were established. The processes of complex extraction were tested and verified. Comparing experimental data with model values, it could be held that the regression precision of model was rather high and the model supplied fundamental data for industrial amplification and practical use of complex extraction.

采用质量作用定律分析方法，成功地推导了同时考虑物理萃取的一元及多元羧酸络合萃取通用液-液平衡数学模型，并在正交试验基础上建立了磷酸三丁酯络合萃取丁酸、三烷基胺（7301）萃取丁酸、丁二酸、柠檬酸的平衡分配系数模型，从平衡角度对络合萃取过程进行了验证与预测，通过实验数据与模型计算值比较，表明模型的拟合精度较好，从而为络合萃取技术的工业放大与实际应用提供了重要依据。

Et Zucc which is unique to Chongqing.Different methods including poaching extraction, soxhlet extraction, microwave extraction and ultrasonicwave extraction were employed to extract toosendanin from the basts of Melia toosendan Sied.Et Zucc in the experiments. Some factors affecting toosendanin extraction rate were discussed in mass transfer theory, and the conditions to extract toosendanin were optimized.

本文用传统的水煮提取法、索氏提取法及现代的微波提取法和超声波提取法对川楝树韧皮中的川楝素进行了提取，系统研究了不同因素对各种提取方法的提取效率的影响，并用传质理论对影响川楝素提取率的因素进行了分析和讨论，优化出了不同提取方法的最佳提取条件。

The extraction amount with soxhlet extraction method was less in each extraction, and this method could be only used in experimental study. The extraction solvent of chemical extraction had pois on which could cause some pollution and toxicity.

索氏提取法每次提取的量较少，只能用于试验研究；化学萃取法的提取溶剂有毒，会造成一定的污染和毒害。

Methods Using acetamide as the internal standard,extraction column and extraction conditions of fluoroacetamide from blood and urine samples were optimized by comparing the extraction efficiency of different solid-phase extraction columns and the effects of experimental conditions on recovery.

选择乙酰胺为内标，通过比较不同固相柱的萃取效率和不同条件对回收率的影响，优化用于血和尿样中氟乙酰胺萃取的固相柱和提取条件，利用氟乙酰胺与乙酰胺质谱图的分子离子峰面积之比与氟乙酰胺浓度的定量关系，建立血和尿样中氟乙酰胺鼠药的GC/MS定量分析新方法。

The results indicate that extraction temperature has a significant effect on the extraction quantity of arecoline, but extraction pressure or extraction time has a little effect.

试验结果表明：超临界萃取的温度对槟榔碱萃取量有极显著的影响，萃取时间和压力的影响较小。

On the base of classifying the level that current third-party

最后采用归纳的方法，对提出的问题有针对性的提出解决问题的方法和建议。

Our country has gone through a long and autocratic society without any democracy period.

我国经历了漫长的没有民主只有专制的封建社会。