Table 3.

Biases on Ch and PCh measurements by interferents at the oPPy modified dual electrode biosensor ¹.

Analyte	Biosensor	Bias (µM) For:
		AA (0.1 mM)	AU (0.5 mM)	CYS (0.2 mM)
PCh	Pt/oPPy/ChO-ALP	1.5	1.2	1.6
Ch	Pt/oPPy/ChO-ALP	0.19	0.15	0.22
Ch	Pt/oPPy/ChO	0.2	0.14	0.25

¹ Carrier solution: borate buffer (pH 9, I 0.1 M); flow rate 1 mL/min; injection volume 20 µL. Other experimental conditions as described in Section 2.