Development and characterization of a fiber optic immuno biosensor
In this paper we describe preliminary results from the development and characterization of a fiber optic biosensor that utilizes a fluorescently-labeled monoclonal antibody to pyrethroid pesticides. A synthetic pyrethroid-like antigen was coupled to bovine serum albumin and immobilized on the surface of a stripped portion of the distal end of an optical fiber. Each fiber was individually calibrated for its optical response using standard solutions of fluoresceinamine. Binding of the antibody was detected via the evanescent wave of the fiber by use of a portable fiber optic fluorimeter. Initial binding rate and equilibrium levels of bound antibody showed a linear relationship with antibody concentrations between 7 nM and 25 uM. To test the reversibility of the biosensor, bound antibody was removed with protein denaturing agents and the same fibers were re-tested with similar concentrations of antibody. When re-immersed in antibody solution, binding of the antibodies was again observed. The results provide encouraging evidence that such a biosensor may be useful for the determination of small organic molecules in situ. 17 refs., 8 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6468034
- Report Number(s):
- UCRL-100110; CONF-8811163-1; ON: DE89005062
- Country of Publication:
- United States
- Language:
- English
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