New experimental findings in a Belousov-Zhabotinsky system with mixed substrate

The oscillatory behaviour of the Belousov-Zhabotinsky system with Ce(III) as the catalyst and citric, malic and malonic acids as the substrate individually or two together is presented and discussed. The behaviour of the system is modified by the inclusion of the second substrate leading to entrainment, independent, reinforcememt or entrainment with reinforcement. The behaviour of the system with individual and mixed substrates can be understood in terms of the individual steps involved in the mechanism of the overall reaction.