Preparation of Organic Fluorine Compounds by Means of Anion Exchange Resins

Regeneration Studies of Anion-Exchange Chromatography Resins

LEVEL: INTERMEDIATE C hromatography columns can become contaminated by a variety of protein and nonprotein species during a purification campaign. Consequences of column contamination include an increase in backpressure, loss of signal resolution, altered product yield, and medium discoloration. Common chromatographic contaminants include • residual proteins • nucleic acids • lipids • endotoxin...

synthesis of 3-aryl-2h-benzo[b]-1,4-oxazines in [omim]bf4 and reduction of organic compounds in methylimidazolium formate

در این پروژه ترکیبات 3-آریل-2h-بنزو[b]-4،1-اکسازین ها از مواد اولیه تجاری مشتقات دو آمینو فنول و ?-هالو کتون های آروماتیک در مایع یونی 1-اکتیل-3-متیل ایمیدازولیوم تترا فلورو بورات([omim]bf4) سنتز شده است. این واکنش توسط باز پتاسیم کربنات محلول از طریق o-آلکیلاسیون و سپس یک واکنش آمیداسیون درون مولکولی خود بخود در مدت زمان کوتاه انجام می شود. ترکیبات 4،1-بنزوکسازین به این روش با بهره خوب تا آلی ...

Determination of fluorine in organic compounds.

Preparation of monodisperse agglomerated pellicular anion-exchange resins compatible with HPLC solvents for ion chromatography

SINCE its introduction in 1975 by Small et a1 . [ ' I , ion chromatography has become the dominant analytical method for determining inorganic anions (and some organic anions) at ppm~ppb level. However, for a long time, the ion chromatography was usually used for the analysis of neat water samples such as tap water, rain and river. For the analysis of polluted water containing vairous organic c...

Displacement chromatography on synthetic ion-exchange resins. 2. The separation of organic acids and acidic amino-acids by the use of anion-exchange resins.

The application of the principle of displacement chromatography to the separation of bases and amino-acids on columns packed with the cationexchange resin Zeo-Karb 215 has been described in Part 1 of this communication (Partridge & Westall, 1949). It is expected that this method will prove to be of value in the isolation of bases and amino-acids from biological extracts of various kinds, and th...