Abstract
A new design for a post-column photochemical reactor is presented, differing from those described in the literature in that different working powers (between 8 and 40 W) may be selected in order to improve detection and linearity of response. The application of the device in post-column photoderivatization of phenolic aldehydes both in high-performance liquid chromatography with UV-Vis or fluorescence detection (isocratic and gradient elutions) and in flow-injection analysis systems is discussed. Use of selectable-power photoreactors such as the one described here allows optimum conditions to be selected for each analyte. Moreover the coil length may be reduced.
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