Ammonia Vapour

Ammonia vapour is often employed in improving the sensitivity of visualization of organic acids where pH indicators like bromocresol green or bromophenol blue have been used initially. The presence of ammonia has the effect of giving a sharper contrast between the chromatographic zones and the plate background. The process of exposure to ammonia vapour can be carried out simply by holding the chromato-graphic plate face down over a beaker of strong ammonia solution. However, it can be done more elegantly by pouring ammonia solution into one compartment of a twin trough developing tank and placing the TLC plate in the dry compartment. With the lid in place the TLC plate is exposed to an almost even concentration of vapour. The process is reversible with time as the ammonia soon evaporates from the adsorbent surface.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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