Disposable Screen-Printed Microchip Based on Nanoparticles Sensitive Membrane for Potentiometric Determination of Lead

Table 4

Determination of Pb²⁺ using the realized DSPLM electrode (microchip assembly 2, t; 25°C, pH; 5, RDS; <3).

No.	Microchips, ppm	ICP, ppm	Recovery, %
1	0.21	0.21	100
2	1.65	1.65	100
3	20.72	19.76	104.8
4	103.60	100.6	102.9
Average recovery			101.9

The results are based on three replicate measurements.