Schiff Base Ligand 3-(-(2-Hydroxyphenylimino) Methyl)-4H-Chromen-4-One as Colorimetric Sensor for Detection of Cu²⁺, Fe³⁺, and V⁵⁺ in Aqueous Solutions

Table 2

Analytical results for real water sample applications.

Metal ion	Sample	Metal ion added (μM)	Metal ion found (μM)	Recovery %	RSD%
Cu^2+	Tap water	70	280	400.1% ± 0.44	0.11
	Al-Aqiq dam water	70	460	657.0% ± 0.86	0.13
	Distilled water	70	400	571.0% ± 0.45	0.08
Fe^3+	Tap water	70	40	57.14% ± 0.40	0.70
	Al-Aqiq dam water	70	30	42.85% ± 0.65	1.52
	Distilled water	70	70	100% ± 0.00	0.00
V^5+	Tap water	70	40	57.14% ± 0.75	1.32
	Al-Aqiq dam water	70	65	92.85% ± 0.36	0.39
	Distilled water	70	68	97.14% ± 0.90	0.93