How to prolong the useful life of Ion Exchange Resin Beds?

Ion exchange resins have wide ranging laboratory and industrial applications. Ideally the resins should retain their exchange capacities and efficiencies for extended periods to be cost effective. Fortunately it is possible to regenerate the resin beds at predetermined intervals on the basis of online monitoring of parameters such as electrical conductivity and pH of output […]

Common Applications of Ion Exchange Resins

Ion-exchange resins offer a convenient and low-cost option for purification, isolation and decontamination of solutions containing ionic species. In addition to the lower cost ion exchange processes are reversible in nature and the exchange resin can be regenerated by simply treating with a solution containing excess of the displaced ions. Typical laboratory applications include separation […]

Classification of Ion Exchange Resins

Ion Exchange resins are natural or synthetic polymeric materials that do not dissolve easily in most solutions and have ionic character due to presence of ionic groups. Such ions are easily exchanged with the ions present in solutions in contact with them. Such character of ion exchange resins has been effectively put to use primarily […]

Distillation and Reflux Condensers

Distillation and Reflux heating are common laboratory operations. Distillation becomes necessary when you have to isolate a pure solvent from a mixture of several other solvents based on the differences in their boiling points. The types of commonly used laboratory distillations have been covered in How to select the optimum laboratory distillation technique. In contrast […]

How to select the optimum Laboratory Distillation Technique?

Distillation is a laboratory practice adopted to isolate a liquid component from others depending on differences in volatilities. Most of you would be familiar with simple or common distillation which is useful for isolation of a pure liquid from others when there is a significant difference between the volatilities. However, situations may arise when you […]

Separation Processes of Significance in Laboratories

It is indeed rare to come across materials of required purity for human consumption, laboratory use or industrial manufacturing. In majority of situations you have to resort to subsequent separation for isolation of the required product from other undesirable impurities for confirmation of identity and quantitative estimations. From times immemorial separations have been in use […]

What are the advantages of Thin Layer Chromatography over Paper Chromatography?

Paper Chromatography provides a simple and cost effective means for separation of components of mixtures. You would have seen the separation of different coloured compounds using the simple paper chromatographic separation technique in your school laboratory. The technique was simple to understand and did not require any expensive equipment. It provided you a visual understanding […]

Special considerations for identification and detection in Thin Layer Chromatography

Thin Layer chromatography presents a low cost, simple and sensitive option for identification and estimation of individual components in a mixture of components. The popular choices offered are Paper chromatography and HPTLC or High Performance Thin layer chromatography. Each of these techniques comprises essentially of a plane surface of paper or a metallic glass plate […]

Advantages offered by Supercritical Fluid Chromatography over HPLC and GC

Gas chromatography and HPLC commonly use inert gases or liquid mobile phases. With the introduction of supercritical fluid chromatography which is a hybrid of the two techniques the scope of applications has expanded due to its several inherent features. In the first place it is important to understand what is a supercritical fluid. A supercritical fluids result […]

Concept of Theoretical Plates in Column Chromatography

As a chromatographer you would be interested in getting the maximum return from your column in terms of performance efficiency. Useful tips on care of HPLC columns have been suggested earlier to preserve the performance features and improve useful life of your column. Now the question arises as to how do you quantify efficiency and decide […]