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Improvements to thin layer chromatography (TLC) analysis can be made easily and cheaply by the application of digital colourphotography and image analysis. The combined technique, digitally enhanced TLC (DE-TLC), is applicable to the accuratequantification of analytes in mixtures, to reaction monitoring and to other typical uses of TLC. Examples are given of theapplication of digitally enhanced TLC to: the deuteromethylations of theophylline to [methyl2H3]caffeine and ofumbelliferoneto [2H3]7-methoxycoumarin; the selection of tertiary amine bases in deuterodechlorination reactions; stoichiometryoptimisation in the borodeuteride reduction of quinizarin (1,4-dihydroxyanthraquinone) and to the assessment of xanthophyllyields in Lepidium sativum seedlings grown in deuterated media.
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