The method was established for purification of diflubenzuron by crystal technique with mixed solvents.
本文论述了利
混合溶剂——结晶法提纯除虫脲
分析技术。
；有偿付能力
，水般;;
,恐水,
恐水,不易被水沾湿;溶剂清洁The method was established for purification of diflubenzuron by crystal technique with mixed solvents.
本文论述了利混合溶剂——结晶法提纯除虫脲分析技术。
Gasoline is a solvent liquid which removes grease spots .
汽油是一种能去掉油污有溶解力液体。
To develop headspace gas chromatography for the determination of residual solvent in Amodiaquine Hydrochloride.
建立顶空气相色谱法分析盐酸阿莫地喹中溶剂残留。
The method of synthesising terpinol with ion exchange resin catalysis was investigated. Effects of kind of solvent used, reaction temperature and reaction time on product output were studied.
探讨了离子交换树脂催化合成松油醇工艺条件，考察了溶剂、反应温度和反应时间等对水合反应影响。
Then ultrasonic wave and solvent were exerted into the crystallizable solution to change its natures,adjust the formation of crystal water and affect the change of crystal configuration.
然后通过施加超声波、溶剂等来改变结晶溶液特性，以调节结晶水形成，干预晶体构型变化。
When the solent front move to the other end，take the paper or plate out of the chamber.After the solvent is vapourized，make the chromatogram visiable by some means.
当溶剂
动到另外一端时，把纸带或板从展开缸里拿出来。等溶剂挥发完后，一定方法使色谱图可见。
SOL 170 is a solvent based impregnator especially formulated to protect marbles, granites and natural stones from water and dirtpenetration, frost damage and to stop calcareous efflorescence.
SOL 170 是一种特别渗透性配方防水剂，有效于保护大理石、花岗岩、天然石材等。防止水印及水渍呈现于石材表面，并可防止污渍渗入表面、冰霜侵入及防止风化。
The company main product includes: High boiling point products and so on solvent series, plasticizer series, aromatic hydrocarbon series, Zhong propyl butyl-carbinol, 2- octanone and thiophen.
高沸点溶剂系列、增塑剂系列、芳烃系列、仲辛醇、2-辛酮及噻吩等产品。
At the same time, in line with the organic solvent concentration around continues to increase, easily due to static electricity produced by filmogen and burst fire.
同时，随着周围有机溶剂浓度不断增加，极易因薄膜材料产生静电而突发火灾。
The content of free acetic acid in cigarette smoke condensates was determined by GC-MS with isopropyl alcohol as the solvent and nonanol as the internal standard.
以异丙醇为溶剂,壬醇为内标,采气相色谱-质谱法分析了卷烟烟气总粒相物中游离乙酸,乙酸测定结果相对标准偏差小于1%,平均回收率为99。
The product is a well balanced cleaner and maintainer based on hard waxes and solvents. It cleans while maintains and protects floors and buffable protective film.
本产品是一种硬蜡和溶剂含量都很高清洁保养产品，兼备清洁和保养双重功效，清洁效率高，并具有持久保养作。
Etodolac was synthesized with 7-ethyltryptophol and methyl 3-oxopentanoate as the starting materials.Highly pure etodolac was obtained by purifying the crude product with a mixing solvent.
以7-乙基色醇和3-氧代戊酸甲酯为起始原料,以甲醇为溶剂,合成了依托度酸.采混合溶剂对粗品进行精制,得到了高纯度依托度酸.
Tigogenin was separated completely from the crude sapogenins by macroporous resin column chromatography,only simple solvent Ilelute was used in the column of the separate process.
大孔树脂为吸附剂色谱方法在分离过程中仅需要简单溶剂-Ⅱ,分离出单一组分剑麻皂甙元占粗皂甙元比率高达70%以上。
Keto-enol tautomerizing of ethyl acetoacetate was studied by UV.It was conformed that the content of enol ethyl acetoacetate decreased with the increasing polarity of solvents.
本文以紫外光谱为手段研究乙酰乙酸乙酯酮-烯醇式互变异构现象;所得结果证实其烯醇式含量随溶剂极性增加而减少。
The main factors that influence the extractive distillation were researched such as the theoretical plate number, feedboard, solvent ratio, reflux ratio, the temperature of solvent.
通过计算考察了理论板数、进料位置、溶剂比、回流比、萃取剂温度等主要影响因素改变对萃取精馏过程影响,为工业应提供理论与实践基础。
Glycerin is validated as a good solvent in extracting DEM-ethanol liquid-liquidly, and thus the necessary basic data has been provided for industry extracting devices.
验证了丙三醇是液液萃取分离二乙氧基甲烷-乙醇良好溶剂，为工业萃取装置设计提供了必要基础数据。
The tautomeric equilibrium between the azo type and the hydrazone type of these compounds in different solvents and different acidity has also been studied.
对它们在不同溶剂。不同酸碱度溶液中偶氮式及腙式间互变异构平衡进行了研究。
It is therefore important to select the appropriate inlet liner, inlet temperature, injection technique (fast autoinjection is recommended), solvent, column installation and split ratio.
因此应选择合适进样衬管、汽化温度、进样技术（推荐使快速自动进样）、溶剂、色谱柱安装位置和分流比等条件。
The separation of three-component system of cyclohexane,cyclo-hexene and benzene by extract rectification with a mixed solvent,comprising hexyl dicyanide and dimethyl acetylamine has been studied.
选己二腈-二甲基乙酰胺组成混合溶剂，对环己烷、环己烯和苯组成三元体系进行了萃取精馏。
The oxidative dimerization of aryl methanes in organic solvents by using alkaline catalysts is an important way to prepare diphenyl ethanes and diphenyl ethylenes.
芳基甲烷在有机溶剂介质中、碱催化下氧化缩合反应,是合成二苯乙烯(烷)类化合物重要途径.
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