Fig. 8. Recovery of the BSA–BuChE–biosensor response after incubation with trichlorfon by 0.1 molrl of PAM-2 in a phosphate buffer pHŽ . s7 after a incubation for 10 min at different concentrations of trichlorfon Ž . Ž . y5 and b incubation with 10 M for different inhibition times.