Kurin-Csörgei Krisztina, Epstein Irving R, Orban Miklós
Department of Inorganic and Analytical Chemistry, L. Eötvös University, H-1518 Budapest 112, P.O. Box 32, Hungary.
J Phys Chem A. 2006 Jun 22;110(24):7588-92. doi: 10.1021/jp0625311.
By coupling the bromate-sulfite-ferrocyanide oscillating chemical reaction with the complexation of calcium ion by EDTA, we construct a system that generates periodic pulses of free Ca(2+) with an amplitude of 2 orders of magnitude and a period of ca. 20 min. These pulses may be observed either with a calcium ion-selective electrode or with Arsenazo(III) as an indicator. We describe the systematic design procedure and the properties of this first abiotic calcium-based chemical oscillator.
