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Abstract
This work demonstrates the electrochemical behavior of the 1-phenyl-3-methyl-4-(α-furoyl)-pyrazolone-5 (HPMαFP) modified glassy carbon electrode (HPMαFP/GCE) by a dropletting method. Tyrosine (Tyr) was detected at the HPMαFP/GCE by cyclic voltammetry. The mechanism and the best condition of electrode reaction were studied. The results indicate Tyr has an excellent electrochemical response at HPMαFP/GCE; under optimized experimental conditions, the peak current is proportional to the concentration of Tyr over a wide range. The linear regression equation at HPMαFP/GCE is IPa (µA) = 1.01134 + 0.96716 C (µmol · L−1) (r = 0.99914). The low detection limit is 1.6 × 10−7 mol · L−1. The modified electrode exhibited high sensitivity, good selectivity, and reproducibility, and it is easy to prepare.
Financial support from the Scientific Research Foundation of the Education Department of Heilongjiang Province (Grant No. 11521061) is acknowledged.