Table 5: Recovery studies of trace metal ions from some real sample.

Real samplesIonsAdded (μg/g)Found (μg/g)Recovery %RSD %

Sour orangeNi0.00.943.9
0.51.47106.03.1
Cd0.00.104.1
0.50.62104.03.5
Zn0.010.653.0
0.511.1294.02.6
Fe0.015.523.2
0.516.0198.02.1
Co0.00.193.8
0.50.70102.03.4

OliveNi0.01.083.1
0.51.60104.02.6
Cd0.00.134.2
0.50.64102.03.8
Zn0.011.133.7
0.511.66106.03.0
Fe0.014.923.8
0.515.4096.03.4
Co0.00.203.7
0.50.6998.03.1

TangerineNi0.00.303.9
0.50.81102.03.6
Cd0.00.154.3
0.50.68106.03.8
Zn0.010.472.9
0.511.00106.02.5
Fe0.013.733.1
0.514.2198.02.5
Co0.00.213.9
0.50.7097.03.4

PearNi0.00.233.8
0.50.7298.03.4
Cd0.00.113.5
0.50.62102.03.0
Zn0.012.733.0
0.513.25104.02.6
Fe0.014.513.0
0.515.02102.02.4
Co0.00.343.7
0.50.8398.03.2

CarrotNi0.00.223.8
1.01.2199.03.2
Cd0.00.403.6
1.01.42102.03.3
Zn0.015.113.9
1.016.13102.33.4
Fe0.017.153.1
1.018.1095.42.8
Co0.00.413.8
1.01.45104.03.5

StrawberryNi0.00.204.2
1.01.1898.03.6
Cd0.00.253.8
1.01.2196.03.3
Zn0.013.153.2
1.014.1095.02.6
Fe0.014.953.0
1.015.99104.02.6
Co0.00.313.8
1.01.36105.03.3