溶剂

This review summarizes the recent developments of LVI for environmental analysis, include on column injection, programmed temperature vaporizer, AT-column, direct sample introduction/difficult matrix injection, concurrent solvent recondensation large volume splitless injection, and also through oven transfer adsorption desorption interface for on-line connection of LC with CGC.

本文总结了几种常见的LVI，包括柱头进样和程序升温进样，以及近年来发展的一些新技术，如在柱同时溶剂浓缩进样、样品直接引入进样/复杂基质进样和同时溶剂冷凝无分流进样，阐述了各种进样技术的基本原理及其与样品提取、LC纯化在线联用的方法在环境分析应用中的一些最新研究进展。

For extraction of green tea polyphenol and Malian black tea polyphenol, different extraction solvents were used to identify the best extraction solvent.

对于绿茶多酚和马里黑茶多酚的提取，用了不同的提取溶剂，从中选出了最好的提取溶剂。

Finally, with the language of VB, the process of extractive rectification was simulated with the method of tri-opposite angles matrix and the effect was researched the ratio of raw and solvent, theory plate number and the feed position of raw and the solvent on the purity of mesitylene was studied.

编制VB程序，结合三对角矩阵法模拟萃取精馏过程，并考察了回流比、溶剂比、理论塔板数、溶剂及原料进料位置对萃取分离效果的影响，为下一步的小试提供了数据基础。

By analyzing the result of these experiments, we realizing that the solvent is very essential in the controlling of the crystallizing and the melting salt works as solvent is possible, and we proposed the idea of operating chemical metathesis synthesizing in melting salt.

通过对实验结果的分析，根据溶剂对于纳米晶粒生长的重要性和熔盐作为溶剂的可能性，我们提出了熔盐中的化学交换法的思路。

In the second step,ion metathesis goes along well and a conversion as high as 85.1％ can be obtained without solvent.

在第一步季铵化反应过程中，不加热不添加任何有机溶剂，可获得高达96.5%的转化率；在第二步离子交换反应中，不加溶剂反应照样进行，转化率可达85.1％。

Single-drop microextraction is an extraction technique that only need several microliter organic solvent(l-2ul).

一滴溶剂革取只需很少的有机溶剂口习＞不对环境造成污染，不对分析人员的健康造成危害，而且克服了 SPME技术不能快捷分析有机氯农药的弱点，是一种分析六六六各种异构体残留量的好方法。

In the fourth sub-problem mixture property constraints concerning the miscibility of the solvents among themselves in the mixture e.g.

在第四次混合财产的限制问题，有关它们之间的混合溶剂混溶例如2（该溶剂的相容性，如果一个二进制mixt

At each fixed solvent composition,the mean activity coefficients of KI decrease at first and then increase with KI molality increases.At each fixed KI molality,the activity coefficients decrease with an increase of methanol in solvent mixtures.

目前文献报道较多的是单一电解质在混合溶剂中活度系数的测定[2-5]以及混合电解质体系活度系数的测定[6-9]，但KI在甲醇-水混合溶剂中的活度系数测定尚未见报道。

The molar volume was found to play an important role on the polymer solutionas well as the Huggins interaction parameter through the dynamic analyzing.

同过去的高分子物理理论强调溶剂的Huggins作用参数所不同的是，我们在这里首次强调了溶剂摩尔体积的作用。

In this section, we focused on the investigation of the condensation, Michael reaction of different aromatic aldehyde with different aryl substituted ketones under solvent-free and PTC conditions, obtained polysubstitutedcyclohexanol derivatives in mordent yield when using TBAB as the catalyst.

通过实验发现，TBAB对该反应具有良好的促进作用，使在液相中需十几个小时甚至几十个小时才能完成的反应，在无溶剂条件下几分钟就可完成，并且使液相中两步完成的反应，而在无溶剂条件下一步就可完成，且产率优良。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了