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determination of acidity
相关语句
  酸性测定
     Determination of Acidity of Ionic Liquids and Alkylation of Diphenyl Oxide with Dodecene Catalyzed by Ionic Liquids
     离子液体的酸性测定及其催化的二苯醚/十二烯烷基化反应
短句来源
     Determination of Acidity of Ionic Liquids and Alkylation of Isobutane with Butene by Chloroaluminate Ionic Liquids
     离子液体的酸性测定及其催化的异丁烷/丁烯烷基化反应
短句来源
     In addition the authors devised a new method for the determination of acidity based on the adsorption isotherm in aqueous potassium hydroxide solutions.
     此外作者还提出了一种新的,基于催化剂在氢氧化钾水溶液中的吸附等温线的酸性测定方法.
短句来源
     Focusing on functionalized acidic ionic liquids,researches on syntheses of Lewis,Bronsted acidic ionic liquids,determination of acidity of ionic liquids and application of acidic ionic liquids to alkylation of isobutane with butene were reviewed.
     围绕着功能化酸性离子液体这一主题,对新型Lewis,Bronsted酸性离子液体、离子液体的酸性测定以及酸性离子液体在异丁烷/丁烯烷基化反应中的应用进行了介绍和评述;
短句来源
  “determination of acidity”译为未确定词的双语例句
     DETERMINATION OF ACIDITY AND BASICITY OF AROMATIC COMPOUNDS AND THEIR CORRELATION WITH FIVE SOLVENT/WATER PARTITION COEFFICIENTS
     芳香烃化合物的酸碱性与五种溶剂/水分配系数的相关性
短句来源
     Quantitative Determination of Acidity and Basicity on Surface of Cu-Al-O Composite Catalyzer by Microcalorimetric Method
     测定Cu-Al-O复合物催化剂表面酸碱性的微量热法
短句来源
     The paper introduces the research results about the detecting tube for quick determination of acidity and SO2 in SF6 gas.
     介绍了可快速测定SF_6气体酸度和SO_2的检测管的研制结果。
短句来源
     Determination of Acidity in Soft Drinks ly Coulometric Titalien Fluorescence Method
     库仑滴定-萤光法测定饮料中酸浓度
短句来源
     DETERMINATION OF ACIDITY IN EMULSIFIED OILS OF REPRODUCTIVE PESTICIDES BY NONAQUEOUS TITRIMETRY
     用非水滴定法测定复配农药乳油的酸度
短句来源
更多       
  相似匹配句对
     Rapid Determination of Milk Acidity
     牛乳酸度的快速测定
短句来源
     Determination of DO
     水中溶解氧的测定
短句来源
     Determination
     决心
短句来源
     Determination the Acidity and Alkalinity on Fabric
     pH试纸不适用于测定织物的酸碱性
短句来源
     DETERMINATION
     决心(英文)
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  determination of acidity
Chemical analysis of ice cream samples, such as determination of acidity, pH and solid matter, was also performed.
      
Determination of acidity constants of enolisable compounds by capillary electrophoresis
      
A sensor for the in situ determination of acidity levels in concentrated sulfuric acid
      
Thus, the determination of acidity constants is possible also without exactly known weight of substances, within the precision of the method (standard deviation 0.01 pK-units).
      
The data analysis program DATAN was applied for determination of acidity constants.
      


There exist a number of different theories as to the nature and the origin of the acidity of silica-alumina cracking catalysts.Even the proper method for its determination is subject to debate. The authors of this paper studied the acidity of co-precipitated silica-alumina catalysts prepared by the same procedure but containing different proportions of alumina and base-exchanged in different solutions.The acidity of each of these catalysts before and after calcination is determined respectively by several known...

There exist a number of different theories as to the nature and the origin of the acidity of silica-alumina cracking catalysts.Even the proper method for its determination is subject to debate. The authors of this paper studied the acidity of co-precipitated silica-alumina catalysts prepared by the same procedure but containing different proportions of alumina and base-exchanged in different solutions.The acidity of each of these catalysts before and after calcination is determined respectively by several known methods.In addition the authors devised a new method for the determination of acidity based on the adsorption isotherm in aqueous potassium hydroxide solutions.The data so obtained by these different methods are correlated with the cracking activity of the different catalysts. Based on the results obtained in this work,the mechanism by which acidic centers are formed in the course of catalyst preparation is discussed,and it is proposed that acidic centers of different nature and acid strength,including both Lewis and protonic acid centers,are present on the surface of co-precipitated silica-alumina catalysts.Acid centers of the protonic type made up of two aluminium atoms are believed to be mainly responsible for the cracking activity of such catalysts, although certain other acid centers may also possess catalytic activity to a greater or less extent.

关于硅铝裂化催化剂的酸性的性质和由来存在着一系列的不同理论.甚至测定硅铝催化剂酸性的适当方法也是争论的问题.本文作者用同样的步骤,但用不同氧化铝含量,并用不同的溶液进行离子交换,制备了不同的共胶硅铝催化剂,并研究了它们的酸性.每个催化剂在陪烧前后用几种已知的方法来测定酸性.此外作者还提出了一种新的,基于催化剂在氢氧化钾水溶液中的吸附等温线的酸性测定方法.用这些不同方法所得的数据和催化剂的裂化活性作了比较.根据本工作所得的结果,作者讨论了在催化剂制备过程中酸性中心形成的机理,并提出了下列看法:在共胶硅铝催化剂的表面上存在着不同性质和不同强度的酸性中心,包括路易(Lewis)酸中心和质子酸中心.作者认为这类催化剂的活性主要是由具有两个铝原子的质子酸中心所产生的,虽然某些其它类型的酸性中心也可能在不同程度上具有催化活性。

This paPer describes a coulometric titration-fluorescence detective method for the direct determination of acidity in fruit juice and soft drinks. The end point can be determined by means of luminol fluorescence indicator. The limit of detection is 5 × 10 7mol/l of acidity. This method is simple, highly sensitive and rapid and the results of drink sample determinated are quite in accord with those of potentiometric titration.

本文介绍库仑滴定荧光法直接测定饮料中酸浓度,用鲁米诺荧光指示剂测定终点,方法简单、灵敏及快速,可检测5×10~(-7)mol/l酸浓度,且饮料试液测定结果与电位滴定法相当吻合.

A method for the determination of acidity in emulsified oils of reproductive pesticides using nonaqueous titrimetry is described.In this method,ethanol is used as the solvent,cresol red and thymol blue as the indicators.The method is simple and rapid,the results are accurate and reliable.It is considered as a good method for practice.

以乙醇为溶剂,甲酚红加百里酚蓝作指示剂,用非水滴定法测定复配农药乳油的酸度。方法简便快速,结果准确可靠,符合工业分析的要求。

 
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