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Table 6 Results for metal ions determination in food samples obtained using the optimum conditions.

From: Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples

Sample Added (μg g-1) Found (μg g-1) a
   Cu(II) Ni(II) Cd(II) Cr(III)
Tomato 0.00
10.00
2.56 ± 0.55 12.72 ± 0.37 8.95 ± 0.24 19.24 ± 0.35 1.12 ± 0.05 11.26 ± 0.04 3.72 ± 0.40 13.49 ± 0.09
Spinach 0.00
10.00
0.56 ± 0.04 10.69 ± 0.15 1.53 ± 0.12 11.29 ± 0.18 0.08 ± 0.02 10.05 ± 0.02 5.85 ± 0.38 16.17 ± 0.29
  1. (N = 5)
  2. a Mean of five determinations ± standard deviation