The Solid Phase Extraction of Some Metal Ions Using Palladium Nanoparticles Attached to Silica Gel Chemically Bonded by Silica-Bonded N-Propylmorpholine as New Sorbent prior to Their Determination by Flame Atomic Absorption Spectroscopy

Table 5

Recovery studies of trace metal ions from some real sample.

Real samples	Ions	Added (μg/g)	Found (μg/g)	Recovery %	RSD %
Sour orange	Ni	0.0	0.94		3.9
		0.5	1.47	106.0	3.1
	Cd	0.0	0.10		4.1
		0.5	0.62	104.0	3.5
	Zn	0.0	10.65		3.0
		0.5	11.12	94.0	2.6
	Fe	0.0	15.52		3.2
		0.5	16.01	98.0	2.1
	Co	0.0	0.19		3.8
		0.5	0.70	102.0	3.4
Olive	Ni	0.0	1.08		3.1
		0.5	1.60	104.0	2.6
	Cd	0.0	0.13		4.2
		0.5	0.64	102.0	3.8
	Zn	0.0	11.13		3.7
		0.5	11.66	106.0	3.0
	Fe	0.0	14.92		3.8
		0.5	15.40	96.0	3.4
	Co	0.0	0.20		3.7
		0.5	0.69	98.0	3.1
Tangerine	Ni	0.0	0.30		3.9
		0.5	0.81	102.0	3.6
	Cd	0.0	0.15		4.3
		0.5	0.68	106.0	3.8
	Zn	0.0	10.47		2.9
		0.5	11.00	106.0	2.5
	Fe	0.0	13.73		3.1
		0.5	14.21	98.0	2.5
	Co	0.0	0.21		3.9
		0.5	0.70	97.0	3.4
Pear	Ni	0.0	0.23		3.8
		0.5	0.72	98.0	3.4
	Cd	0.0	0.11		3.5
		0.5	0.62	102.0	3.0
	Zn	0.0	12.73		3.0
		0.5	13.25	104.0	2.6
	Fe	0.0	14.51		3.0
		0.5	15.02	102.0	2.4
	Co	0.0	0.34		3.7
		0.5	0.83	98.0	3.2
Carrot	Ni	0.0	0.22		3.8
		1.0	1.21	99.0	3.2
	Cd	0.0	0.40		3.6
		1.0	1.42	102.0	3.3
	Zn	0.0	15.11		3.9
		1.0	16.13	102.3	3.4
	Fe	0.0	17.15		3.1
		1.0	18.10	95.4	2.8
	Co	0.0	0.41		3.8
		1.0	1.45	104.0	3.5
Strawberry	Ni	0.0	0.20		4.2
		1.0	1.18	98.0	3.6
	Cd	0.0	0.25		3.8
		1.0	1.21	96.0	3.3
	Zn	0.0	13.15		3.2
		1.0	14.10	95.0	2.6
	Fe	0.0	14.95		3.0
		1.0	15.99	104.0	2.6
	Co	0.0	0.31		3.8
		1.0	1.36	105.0	3.3