Highly Sensitive Detection of Organophosphate Insecticides Using Biosensors Based on Genetically Engineered Acetylcholinesterase and Poly(3,4-Ethylenedioxythiophene)

Table 1

Stability of the electrochemical response after being tested several times. Amperometric response to thiocholine 25 mM at 100 mV. Comparison between oxidation currents (in nA) from electrodes modified with CoPC classical and enzymatic PEDOT.

No	Currents of electrodes modified with [nA]:
	Classical	Enzymatic	Enzymatic
	PEDOT	PEDOT	PEDOT + PVA layer
1	310	220	185
2	312	205	196
3	318	190	175
4	307	87	207
5	302	30	193
6	314	—	211
7	321	—	181
8	319	—	173
9	330	—	211
10	308	—	184