Catalytic systems based on the organic nickel(ii) complexes in chronoamperometric determination of urea and creatinine

The organic nickel(ii) complexes with catalytic activity in the electrochemical oxidation of creatinine and urea were synthesized and studied. The signals of electrocatalytic oxidation of the studied carbonyl-containing amines in model solutions were obtained. The detection limit (by the 3 sigma-criterion) is 8.7 center dot 10(-6) and 2.7 center dot 10(-5) mol L-1 for urea and creatinine, respectively.