A chemically modified electrode based on the chitosan-multiwall carbon nanotube (MWNT) coated glassy carbon electrode (GCE) was described, which exhibited an attractive electrochemical catalytic ability to norepinephrine(NE). The linear calibration range for NE was 5 ×10^-6 mol/L to 1×10^-4 mol/L in a phosphate butter solution (pH=5.5). And other biomoleculars such as dopamine(DA) and uric acid (UA) also had attractive electrochemical response at the MC/GCE. T...