Future Prospects

The last decade has seen a move away from the use of spray reagents to immersion devices. This trend will inevitably continue as the hazards associated with the spraying of chemical reagents, many of which contain harmful substances, can be avoided by dipping. The greater control over the visualization process that dipping affords is also something that will be encouraged as the whole TLC technique becomes more standardized. Although many chemical reagents are already available, it is likely that new group-specific reagents will be discovered, often replacing those that contain toxic chemicals.

It is in the area of sequencing reactions where probably the greatest growth will occur as only a

Figure 3 A commercial immersion device for automatic dipping of TLC chromatograms in visualization reagents. (Reproduced with the permission of CAMAG, Switzerland.)

limited number of protocols are presently available. The visualization of the many different types of compounds present in herbal products may well drive the research required.

A. Siouffi, Faculte des Sciences de St-Jerome, Marseille, France

G. Guiochon, University of Tennessee, Knoxville, TN, USA

Copyright © 2000 Academic Press

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Solar Panel Basics

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