Bioactive Paper Sensor Based on the Acetylcholinesterase for the Rapid Detection of Organophosphate and Carbamate Pesticides

Figure 3

Schematic representation of biosensor support construction. (a) The gel formulation that contains AChE/glutaraldehyde-chitosan/DTNB mixture. (b) The AChE/glutaraldehyde-chitosan/DTNB was directly applied on Canson papers and dried at 37°C for 15 min. (c) The bioactive strip-based sensors were fixed on a Canson paper as a support. (d) Paper sheet was cut to 1 × 10 cm strips. (e) Paper strip after dipping in ATChI solution and incubation at 37°C for 5 min for yellow color formation.