Determination of selected heavy metals using amperometric horseradish peroxidase (HRP) inhibition biosensor

摘要

Fabrication of an amperometric biosensor for determination of heavy metals in tap water based on the inhibition of horseradish peroxidase activity is reported. The inhibition of the biosensor's response to 0.95mM H2O2 at -200mV (vs. Ag/AgCl) followed the order, Cd ~+ 95% of its initial response and gave a reproducibility of 3.8% and precision of 2.1%.