| Summary: | Chemiluminescence (CL) of selected inorganic reaction systems, generating ultraweak photonemission, has been studied. The kinetics of the systems and their emission spectra have been characterisedby measurements with the use of the stationary and the flow methods of CL recording. The systems studiedcontained cations at different oxidation degree such as Fe<sup>2+\3+</sup>, Cu<sup>+\2+</sup>, Co<sup>2+\3+</sup>, Eu<sup>2+\3+</sup>, CLO<sup>-</sup> anions and hydrogen peroxide without organic sensitisers. On the basis of the analysis of the spectra, in particularsystems emitters have been identified and mechanisms of the reactions have been proposed. The effectof carbonate and azide ions and propylene carbonate on the yield of CL and spectral characterisationof the systems studied has been evidenced and discussed. A possibility of the application of the systems Eu<sup>3+</sup>\N<sub>3</sub><sup>-</sup> \H<sub>2</sub>O<sub>2</sub> and Co<sup>2+</sup>\propylene carbonate\H<sub>2</sub>O<sub>2</sub> for analytical purposes has been considered.
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