A Dipstick-Type Electrochemical Immunosensor for The Detection of The Organophosphorus Insecticide Fenthion
2005
Cho, Y.A. (Kyungpook National University, Daegu, Republic of Korea) | Cha, G.S. (Kwangwoon University, Seoul, Republic of Korea) | Lee, Y.T. (Yeungnam University, Gyeongsan, Republic of Korea) | Lee, H.S. (Kyungpook National University, Daegu, Republic of Korea), E-mail: [email protected]
A dipstick-type immunochemical biosensor for the detection of the organophosphorus insecticide fenthion was developed using a screen-printed electrode system as an amperometric transducer with polyclonal antibodies against fenthion as a bioreceptor. The assay of the biosensor involved competition between the pesticide in the sample and pesticide-glucose oxidase conjugate for binding to the antibody immobilized on the membrane. This was followed by measurement of the activity of the bound enzyme by the supply of the enzyme substrate (glucose) and amperometric determination of the enzyme reaction product (H₂O₂).
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