This research was prepared film hybrid between polypyrrole and poly ethylene I have (PPy-PEI hybrid film) for preparing bio-sensors for measuring the concentration of urea. Doping with hydroquinone monosulfonate (HQS) by synthetic film PPy (Polypyrrole) on stainless steel electrodes by using cyclic volt - Tampa's University. Then make adjustments to suit the surface film PPy-fixing enzyme urease. Through the creation of a covalent bond. The coated film PEI in preparing film hybrid experiment two ways the film PPy curing in saturated vapor of EDA (Ethylenediamine) (Vapor deposition) and dipping the film PPy into a solution EDA (Solution casting) then. PPy film that absorbs the EDA and go into the process Plasma polymerization. And contribute to enzyme immobilization Urease through covalent bonds with glutamic mold formaldehyde. The film hybrid prepared to measure the response of urea by a linear relationship in the concentration of urea 5 × 10-4 to 5 × 10-2 M (pUrea 1.3-. 3.3), the film prepared by the EDA techniques dipped in a solution of urea respond better. The response urea 42.08 mV / pUrea (R2 = 0.9775) take in response to 30 seconds, then remove the film hybrid prepared to study the surface with advanced XPS found. XPS spectra show peaks -N = (imine) with apparent signs of covalent bond formation of glutathione mold aldehyde with the enzyme urease.
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