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Oscillations of pH in the urea–urease system in a membrane reactor
František Muzika,Matěj Růžička,Lenka Schreiberová,Igor Schreiber
Physical Chemistry Chemical Physics Pub Date : 04/02/2019 00:00:00 , DOI:10.1039/C9CP00630C
Abstract

Herein, we present direct experimental evidence of pH oscillatory dynamics in the urea–urease enzymatic reaction conducted in a continuous reactor–membrane–reservoir system. Our results are consistent with earlier model predictions requiring differential transport of H+ and substrate. We report oscillations with periods in hundreds of seconds and the amplitude of ∼0.1 pH units.

Graphical abstract: Oscillations of pH in the urea–urease system in a membrane reactor
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