查询词典 chromatography

Objective To improve and optimize the method of thin-layer chromatography for the alkaloid determination in radix aconite lateralis praeparata.

目的探讨附子生物碱薄层层析色谱条件的影响因素，完善附子生物碱TLC的检查方法。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

To establish a method for the direct determination of methyl methacrylate and butyl acrylate in the air of workplace by gas chromatography.

目的 建立工作场所空气中甲基丙烯酸甲酯和丙烯酸正丁酯气相色谱直接测定的方法。

Objective: A method for determination of residual acrylonitrile monomer in food packaging by headspace capillary gas chromatography has been developed.

目的：建立了自动顶空毛细管气相色谱法测定食品包装材料中残留丙烯腈单体含量的分析方法。

Two main bioactive components were isolated by thin layer chromatography, which were all identified as actinomycin.

利用放线菌素类抗生素合成酶保守引物在该菌基因组中扩增到770 bp的相关基因片段。

On the basis of these studies, sensitive and rapid determination methods of AM and MA in urine by gas chromatography with electron-capture detection combined with various acyl derivatization were developed.

在此基础上，建立了人尿中苯丙胺和甲基苯丙胺的酰基衍生化的气相色谱－电子捕获检测分析方法。

Using high performance liquid chromatography and liquid scintillation counting , we investigated the proportion of incorporation to adduction for formic acid and DNA.

我们采用高效液相色谱法与液体闪烁计数法相结合，研究了在小鼠体内，甲酸与DNA大分子结合的动力学曲线，并且探讨了甲酸与DNA的掺入与加合的比例的变化。

This is essentially the same as affinity chromatography.

这在本质上与亲和层析是一样的。

An ion chromatography method for the determination of sulfate content in agar was established.

确立了离子色谱法检测琼胶中硫酸基含量的样品处理方法和检测条件。

Objective: To estabilish a method for the determination of 8 organic poisons in the air by capillary column gas chromatography.

目的：建立工作场所空气中有毒有机物的测定方法。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。