From: New potentiometric sensors for methylphenidate detection based on host–guest interaction
Urine sample
Sensor 1
Sensor 2
Sensor 3
HPLC
Recovery, %
98.5
98.0
97.5
99.0
SD
0.084
0.092
0.081
0.077
RSD, %
3.2
3.5
3.1
2.9