Analysis of the petroleum class in the water by using chlorinated tetrafluoroethylene polymer instead of carbon tetrachloride as the extracting agent; 综述了含氟聚合物的种类及研究进展,重点概述了含氟聚合物在精细化工方面的应用。
Dichloromethane was used as extracting agent for the extraction, and then vacuum rotatory evaporator was used for the concentration. 以二氯甲烷为萃取剂对茅台迎宾酒中的微量成分进行了萃取,然后用真空旋转蒸发器将其浓缩。
The results indicated that extraction yield and product purity of OPC were high when broken grape-seed and dry grape-seed shell degreased by mineral ether were used as raw material, mixture of acetic ether and water was used as extracting agent. 结果表明,以粉碎的葡萄籽、石油醚脱脂干燥后的葡萄籽壳为原料,乙酸乙酯+水为提取剂所得提取产物纯度高,提取率可达0.4%~o。
The influential factors such as the saponification value, pH value of balanced aqueous phase and the concentrations of extracting agent were studied. 研究了皂化度、平衡水相pH值、萃取剂浓度等影响因素。
Effects of PH in the reaction medium, the incubation temperature, the extracting agent and the sample matrix on the detection sensitivities were also studied and discussed. 笔者还对孵育介质pH和温度、提取剂及样品基体等因素对定量曲线的影响进行了研究和讨论。
The influence factors, such as extraction time, acidity and pH value of aqueous phase, the concentration of extracting agent and inert solvent are discussed. 对萃取时间、水相的酸度、水相的pH值、萃取剂的浓度、稀释剂等影响因素进行了较全面的分析。
The substance was extracted from the waste residue after withdrawal of glycyrrhizin using alcohol with different concentration as extracting agent separately. The activity of substance extracted with 60% alcohol was best through activity trace detection. 对甘草甜素提取后的废渣,分别用不同浓度的乙醇进行粗提,通过活性跟踪检测,筛选出60%乙醇提取物活性最好;
Studies on the extraction method of Thea Saponin by using anhydrous alcohol as the extracting agent 以无水乙醇为提取剂的茶皂素提取方法研究
The dispersion of nano-particles in UHMWPE gel fibers and the effect of nano-particles on the extracting process of gel fibers were investigated by observation with scanning electron microscopy and determination of extracting agent viscosity and oil removal ratio of gel fibers. 通过表面扫描电镜(SEM),萃取液粘度和冻胶纤维萃取除油率的测定,研究了纳米粒子在UHMWPE冻胶纤维中的分散情况及纳米粒子的加入对冻胶纤维萃取过程的影响。
At present, multi element useful state analysis is under groping stage, orthogonal trial method is applied in the text to conduct extraction test, the AB DTPA extraction conditions of multi element useful state extracting agent are optimized. 多元素有效态分析目前仍处于探索研究阶段。采用正交试验法进行浸提试验,优化了多元素有效态浸提剂AB-DTPA的浸提条件。
This new method has changed the extracting agent of original phloroglucinol method, developing agent preparation is also improved. 改变了原方法中的溶剂抽提系统,显色剂的配方作了改进。
A new extraction method of monascouruarin was established by the use of red kojic rice as raw material and ethyl alcohol as an extracting agent. 本实验确立了一种新的红曲霉色素提取方法:以红曲米为原料,乙醇为提取剂,得到的提取液再以正己烷提取分离。
Ampyrone spectrophotography is popularly used in water quality examination to determine volatile phenol content in the water, and the extracting agent used in this method is chloroform. 水质检测普遍采用4-氨基安替比林分光光度法测定水中挥发酚类含量,此方法中所用萃取剂为氯仿。
Based on the principle of that metal chloride and organic sulfide can produce water-solubility complexing compound which can be extracted, after comparing the desulfurizing effect of the DMSO and DMF, DMF is chosen as extracting agent for more experiments. 基于用金属氯化物可以与有机含硫化合物生成水溶性的络合物而加以去除的原理,通过对比DMSO、DMF的脱硫效果,决定采用DMF作为络合萃取的萃取剂。
Extracting agent N, N-dimethyl formamide ( DMF) could extract totally polystyrene homopolymer from grafting polymer. 以N,N-二甲基甲酰胺(DMF)为萃取剂可将接枝共聚产物中的聚苯乙烯(PS)均聚物萃取干净。
Sulfuric acid is separated by transferring the organics in the waste acid to the extracting agent. 该法利用相似相溶原理,使废酸中的有机物转移到萃取剂中,从而使硫酸分离出来。
The extent of mobilizing increased with increment of organic acid concentration when extracting agent was the same organic acid. 同种有机酸作浸提剂时,有机酸浓度越高磷酸盐中磷素释放量也越大。
According to the diffusion coefficient values of fiber solvent in different extracting agents, and comprehensively considered the extracting essence and purpose of gel fiber, dichloromethane was selected as the optimum extracting agent. 通过纤维溶剂萃取扩散系数的大小,结合冻胶纤维萃取的本质和目的,选定二氯甲烷为最佳萃取剂。
Study of new types of di tertiary amine ion associating extracting agent 双叔胺新型离子缔合萃取剂研究
A new extracting agent of piperidine derivant was synthesized. 合成了一种新萃取剂哌啶多氮衍生物。
The best dyeing result has been obtained with the mulberry leaves dye liquid extracted by microwave technique with NaOH extracting agent incorporated with surfactant. 采用微波提取法并在NaOH提取剂中加入表面活性剂的桑叶染色液染色效果较好。
After experimental study for about two years, by using new process instead of taking benzene as extracting agent, finally obtained a pure wool grease which met the national pharmaceutical standard, and could be used as raw material of pharmaceutical and cosmetic industry. 经过近2年的试验探索,废弃了用苯作提取剂的传统方法,采用新的工艺技术,最终使羊毛脂经提纯后达到国家药用级标准,为制药、化妆品生产提供了宝贵的原料。
The computational formula for diffusion coefficient ( D) of fiber solvent is as follows: During the process of di-diffusion, D is related to the variety of extracting agent and extracting mode, D increases with the increasing of extracting bath ratio and temperature. 双扩散过程中溶剂扩散系数与萃取剂种类和萃取方式有关,并随萃取浴比和萃取浴温度的升高而增加。
This paper studied the relationship between extracting rate and its effects ( extracting agent, temperature, time, pH value and acidulating agent) in the process of extracting rough Glycyrrhizic acid from Glycyrrhiza. 研究萃取剂用量、温度、时间、pH值、酸化剂与甘草中甘草酸粗品提取率之间的关系。
In the supercritical fluid extraction, the alcohol was chose as the extracting agent innovative. The influence of temperature, pressure, density of quinoline, cosolvents was studied in the supercritical extraction proceeding. 创新性地选取乙醇为超临界溶剂,研究了超临界萃取过程各个因素的影响。
The characteristic work of this study are: In the common extraction proceeding, the pH and density of extracting agent had a great effect on extraction efficiency. 论文的特色工作在于:研究了洗油预蒸馏得到富喹啉馏分的普通萃取过程,结果表明萃取剂酸性和浓度对萃取效率影响较大。
In the process flow of produce acrylic acid we can separate the crude acrylic acid from extracting agent through distillation. 丙烯酸生产工艺流程中通过蒸馏,可把粗丙烯酸从萃取剂中分离。
The extracting agent is a dual mixed extractant, being made up of neutral extractant A and B having small water solubility. 混合萃取剂由水溶性小的中性萃取剂A、B组成。