Introduction

At the end of the 1950s thin-layer chromatography was introduced as a rapid, simple technique for qualitative investigations, and it is still widely used in this capacity. With the introduction of high performance plate material (HPTLC) and the availability of dedicated densitometers, thin-layer chromatography has gained increasing acceptance as a quantitative analytical tool. However, to unlock its full potential as an accurate and reliable technique, HPTLC demands the use of instrumentation for the entire process including sample application, chromatogram development and chromatogram evaluation. Since analytical procedures are only as good as their weakest step, additional operations such as in situ pre- or post-chromatographic derivatization, as well as sample preparation, require instrumentation for increased reproducibility.

Although several attempts have been made to automate fully the complete TLC process, it seems questionable whether such automation would increase the overall performance of the method. It has proved very difficult to design a device, at a reasonable cost, that

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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