Table 1: Results of the ACh level in human blood sample using AChE-ChOx-modified biosensor based on GCE and SPEa.

Sex (20 years old)ACh level (GCE) ( M)ACh level (SPE) ( M)

Male57.040.2
Female68.552.1

The sample is prepared by adding human blood (3.3 × 10−2 mg) in 0.1 M PBS with 1.0 mM K3Fe(CN)6/K4Fe(CN)6 (10 mL).