Immersion Devices

In the last few years, dipping or immersion devices for TLC and HPTLC plates have been gaining in popularity. There are obviously benefits with regards to the handling of harmful, irritant or toxic chemicals, but also the uptake of reagent on to the chromato-graphic layer can be better controlled by immersion.

Chambers for immersion devices need to be as narrow as possible to limit the amount of reagent required, but not so narrow that the chromatographic layer is damaged by contact with the vessel. Manual dipping can be employed, but it is important that the chromatogram is fully dipped and the motion of dipping is done in one constant motion, otherwise 'tide' or 'contour'-like marks will appear on the layer. These will usually interfere with any further spectro-densitometric evaluation.

For good reproducibility and reliable constant uptake of reagent into the chromatographic layer, automated immersion devices are essential (an example is shown in Figure 3). These allow precise control of the time of immersion and the rate of dipping, which is essential for good reproducible results.

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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