Collect. Czech. Chem. Commun. 1991, 56, 1173-1179

Determination of the intensity of polychromatic radiation in the reaction compartment as a function of wavenumber

Radim Hrdina, Igor Čepčiansky and Hana Bittová

Department of Organic Technology, Institute of Chemical Technology, 532 10 Pardubice


A procedure is suggested for studying the kinetics of photochemical reactions using excitation with polychromatic radiation, where the wavenumber dependence of the intensity of the polychromatic radiation entering the reaction compartment must be known. The observed relative intensities of the polychromatic source are calibrated by ferrioxalate actinometry, selected parts of the emission spectrum being eliminated by insertion of filters. The relative intensities of an HBO 200 high-pressure mercury lamp were measured. For the sake of brevity, the experimental data were fitted by a mathematical model (a polynominal), and only the parameters of the polynomial are presented in a tabular form.