Nickel(II) Selective PVC-Based Membrane Sensor Using a Schiff Base

Table 3

Results of Nickel (II) ion determination in spiked water samples.

Sample	Added	Found (𝑥±3s)	Recovery
Drinking water	—	<DL*	—
Drinking water	1.00×10^−5	(1.06±0.09)×10^−5	%106.0
Drinking water	1.00×10^−4	(9.80±0.15)×10^−5	%98.0
River water	—	<DL*	—
River water	1.00×10^−5	(1.10±0.11)×10^−5	%110.0
River water	1.00×10^−4	(1.09±0.10)×10^−4	%109.0
Waste water	—	<DL*	—
Waste water	1.00×10^−5	(1.08±0.19)×10^−5	%108.0
Waste water	1.00×10^−4	(1.03±0.18)×10^−4	%103.0

*DL; detection limit.