karl fischer's reagent是什么意思

用法例句

Spectrophotometric Determination of Urea in Milk with Nessler's Reagent;

纳氏试剂分光光度法测定牛奶中尿素含量

Defects and correcting in determination of HN_3-N by nessler's reagent spectrophotometry.;

纳氏试剂比色法测定氨氮的问题及修正

Experiment was undertaken to detect NH3-N in sea water by Nessler's reagent colorimetry.

进行了用纳氏试剂比色法直接测定海水中氨氮的试验。

This review summarizes the recent advance in the enantioselectivity of 1,4-conjugate addition of Grignard reagents to α,β-unsaturated carbonyl compounds catalyzed by copper-complex.

介绍了铜络合物催化的格氏试剂与α,β-不饱和羰基化合物的立体选择性1,4-共轭加成反应的研究进展。

Tri(m-ethoxyphenyl)bismuthine was synthesized by mixing the Grignard reagent with trichlorobismuthine.

利用相转移催化法得到了间溴苯乙醚,再通过相应的格氏试剂与三氯化铋反应合成了标题化合物,在乙醇和乙醚的混合溶剂中培养出单晶,并通过X射线单晶结构分析法测定了分子结构和晶体结构。

Cross-coupling reaction of polymer-supported (E)- vinylic selenides with Grignard reagents in the presence of NiCl 2(PPh 3) 2 as catalyzed yielded (E)-1,2-disubstituted ethenes on solid-phase.

聚苯乙烯负载硒溴与炔基锂反应合成聚苯乙烯负载炔基硒醚 ,再与LiAlH4 反应制得聚苯乙烯负载反式烯基硒醚 ;此负载型烯基硒醚在NiCl2 (PPh3 ) 2 存在下与格氏试剂发生的偶联反应 ,提供了一种有效的 (E) - 1,2 -二取代乙烯的固相有机合成方

This paper makes a brief introduction of the preparation of general Grignard reagents and di Grignard reagents,their properties and their reasonable application in organic and organometallic synthesis.

介绍了格氏试剂和双格氏试剂的制备、特性以及在有机合成和金属有机合成方面的应用。

Grignard reagents are among the most important and traditional organometal reagents.

格氏试剂是最重要和最常用的有机金属试剂之一,使用格氏试剂对双键加成是生成碳碳键的重要方法之一。

A method for preparing the Wijs reagent with molar ratio I2/C12 = 1.

结果表明:用本法制备的韦氏试剂的碘值测定精密度远高于其他两个。

Two different preparing methods of Nessler reagent used for ammonia nitrogen determination are compared on the aspects of Abs blank and calibration curve and determination limit and accuracy and recoveries of spiked samples.

对纳氏试剂的两种配制方法在配制难易和含汞量、空白吸光度、校准曲线、检出限、精密度和加标回收率等方面作了比较,得出KI、HgCl2和KOH配制的纳氏试剂与KI、HgI2和NaOH配制的纳氏试剂相比,配制虽麻烦,但含汞量、空白吸光度和检出限均较低,而灵敏度、精密度和加标回收率却较高,可作为配制纳氏试剂的首选方法。

In determination of ammoniacal/nitrogen in waste water with colorimetry,Nessler reagent was added,a great amount of gray precipitation was generated.

阐述应用纳氏试剂比色法测污水中氨氮时,加入纳氏试剂后产生大量灰色沉淀的原因及消除办法,对产生沉淀的机理进行初步探讨。

When measuring the content of N in the form of NH 3 or HN + 4 in water by the method of Nessler reagent luminosity,the developing time and environmental temperature have the key influence on the measurement.

采用纳氏试剂光度法测定水中氨氮含量时 ,显色时间与环境温度对测定结果有决定性的影响。

Water quality--Determination of ammonium--Nessler's reagent colorimetric method

GB/T7479-1987水质铵的测定纳氏试剂比色法

Air quality--Determination of ammonia--Nessler's reagent colorimetric method

GB/T14668-1993空气质量氨的测定纳氏试剂比色法

Reaserch on Effective Factors in Determination of Ammonia-Nitrogen by Nessler's Reagent Colorimetry Method

纳氏试剂比色法测定水中氨氮影响因素的研究

The Water Ammonia-nitrogen Analysis and Improvement Using The Natium Reagent Luminosity Law Determination

水中氨氮纳氏试剂分光光度法测定与改进

Comparison of Ammonia Nitrogen Determination with Nessler Reagent by Preparing with Two Kinds of Different Methods

纳氏试剂两种配制方法对氨氮测定的影响比较

Determination of Protein by Nessler Reagent Spectrophotometry

食品中蛋白质的纳氏试剂分光光度快速测定法

Comparison of Ion Chromatography with Nessler's Reagent Spectrophotometry in Detecting the Concentration of NH_4-N in Surface Water Samples

离子色谱法和纳氏试剂光度法测定地表水中氨氮的比较试验

RESEARCH ON KEY ISSUES IN DETERMINATION OF AMMONIA NITROGEN IN WATER AND WASTEWATER BY NESSLER'S REAGENT SPECTROPHOTOMETRY

纳氏试剂光度法测定水和废水中氨氮关键问题的研究

Dicussion about Factors Influencing in Determination of Ammonia-Nitrogen by Nessler's Reagent Colorimetry Method

纳氏试剂比色法测定水体中氨氮影响因素的探讨

Folin's acid molybdate reagent

福林氏酸性钼酸盐试剂

Comparison and Analysis of the Similarities and Differences between Grignard Reagent and Reformatsky Reagent;

格氏试剂与有机锌试剂的异同比较及分析

Napier's aldehyde test

(黑热病血清反应) 纳皮尔氏醛试验

RESEARCH AND PRODUCE OF REAGENT-KIT FOR BRUCELLA AMR-McAb-E

布氏菌AMR—McAb—E试剂盒的研制

Study on Stereoselectivety of Reduction of Camphor Using Grignard Reagent

格氏试剂还原樟脑的立体选择性研究

Experimental Study on the Treatment of Infectious Bursal Disease with "Bi-Huang" Combinations;

铋磺合剂治疗鸡传染性法氏囊病试验

Application of a PCR diagnostic kit for Cryptosporidium baileyi to poultry

贝氏隐孢子虫PCR诊断试剂盒的应用

Development of a PCR detection kit for Cryptosporidium baileyi in poultry

贝氏隐孢子虫PCR检测试剂盒的研制

Synthesis of Methylmagnesium Methylsulphate as Methyl Grignard Reagent

甲基格氏试剂甲基硫酸甲基镁的合成