Abstract: An electrochemical detector cell for FIAof glucose in serum has been developed.It was a three electrodes system involved a homemade copper-PTFEcomposite plated film electrode (working) and other two electrodes, silver (reference) and platinum(auxiliary) wires.The carrier liquid for FIAwas 0.5 mol/L NaOHand flowed through the cell at 2.1 mL/min.The working electrode potential was set at 0.6 V(vs.reference) by potentiostat.Sampling 30 ftLtest solution which was 1% serum sample diluted with water, a peak current was recorded by chronome-try.The peak current was linearly related with the concentration of glucose in the range of 5 × 10^-3-2×10^-1 mmol/L.The analytical results from our method were pretty correlated to those from glucose oxidase-4-aminoanti-pyrine-phenol method(Trinder method).The regression equation from the results of twenty samples was Y=-0.039 + 1.005X, r=0.9999.It was shown that our method was speedy, cheap and reliable.

Key words: Glucose in serum, Flow injection analysis, Electrochemical detector cell