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A highly sensitive method for the determination of epinephrine was proposed,  which was based on the perturbation of epinephrine to Briggs-Rauscher  oscillating system involving malonic acid, Mn2+, H+, IO3 - and H2O2 at  non-equilibrium stationary state. The concentration of KIO3 was chosen as a  control parameter to find the bifurcation point in this paper. Results showed  that a well linear relationship between the difference of potential and the  negative logarithm concentrations of epinephrine existed in the range of  1.1×10-75.2×10-9 mol L-1 with a lower detection limit of 6.8×10-10mol L-1  and a correlation coefficient of 0.9974. Compared to the classical  oscillating reaction, this method has a lower detection limit and wider  linear range. The effects of some foreign species, which may possibly be  existed with epinephrine, on determination were also investigated. The  proposed method has been successfully used to determine the epinephrine both  in the serum and adrenaline hydrochloride injection

Determination of epinephrine by the Briggs-Rauscher oscillating system using non-equilibrium stationary state