Further Reading

Jork H, Funk W, Fischer W and Wimmer H (1989, 1994) Thin-layer Chromatography, Reagents and Detection Methods, vols 1a and 1b. Weinheim: VCH. Stahl E (ed.) (1969) Thin-layer Chromatography: A Laboratory Handbook, 2nd edn. Berlin: Springer-Verlag. Stahl E (ed.) (1973) Drug Analysis by Chromatography and

Microscopy. Michigan: Ann Arbor Science. Touchstone JC (1992) Practice in Thin Layer Chromatography, 3rd edn. New York: Wiley-Interscience. Wager H and Bladt S (1996) Plant Drug Analysis: A Thin Layer Chromatography Atlas, 2nd edn. Berlin: SpringerVerlag.

qualitative data are obtained when no care is taken to carry out experiments! The advent of nanoplates coated with fine particles has given a renewed interest in the technique as excellent separations have been reported. By analogy to HPLC (high performance liquid chromatography) the acronym HPTLC (high performance thin-layer chromatography) appeared in the literature. Unfortunately different claims of performance have been published and some misunderstanding between pro and anti HPTLC camps have arisen, leading to fruitless discussions.

In their first paper, Ripphahn and Halpaap reported height equivalent to one theoretical plate (HETP) as low as 15 |im with these nanoplates; on the other hand Delley and Szekely cut a 'normal TLC' plate in four parts to yield the size of nanoplates and obtained identical results. The data of Ripphahn and

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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