The electrochemical behavior of hemoglobin at a lipid-lauric acid modified glassy carbon electrode (GC) is reported. In the potential range of +0.8～-0.7 V (vs. Ag/AgCl), an irreversible cathodic peak was observed at -0.4 V at the scan rate of 20 mV/s. In the medium of 0.01 mol/L KH_2PO_4-Na_2HPO_4 (pH 6.0), the cathodic peak current shows linear relationship with the concentration of hemoglobin in the range of 1.25 * 10~(-8)～4.31 * 10~(-7) mol/L. The electrode can be used as an approach for determining hemoglobin with high sensitivity.

Key words: HEMOGLOBIN, LIPID MEMBRANE, PHOSPHOLIPID, LAURIC ACID, GLASSY CARBON ELECTRODE, CHEMICAL MODIFIED ELECTRODE