Research Article
Analysis of Some Trace Metals in Fish Species after Preconcentration with Congo Red on Amberlite XAD-7 Resin by Flame Atomic Absorption Spectrometry
Table 1
Effect of type and concentration of eluting agent on the recovery of analytes (
).
| | Eluent conditions | Recovery (%) | | Cu(II) | Ni(II) | Fe(III) | Zn(II) | Cr(III) | Cd(II) | Pb(II) |
| | HCl (2.0 mol L−1) | 75.4 | 69.4 | 88.0 | 48.6 | 94.2 | 35.2 | 29.5 | | HClO4 (2.0 mol L−1) | 24.6 | 57.8 | 61.2 | 55.0 | 46.7 | 33.3 | 29.5 | | H2SO4 (2.0 mol L−1) | 68.7 | 99.5 | 28.5 | 64.2 | 37.8 | 39.8 | 62.5 | | HNO3 (1.0 mol L−1) | 93.4 | 90.1 | 89.6 | 88.7 | 86.9 | 87.5 | 85.8 | | HNO3 (2.0 mol L−1) | 97.5 | 94.3 | 93.2 | 94.6 | 91.5 | 92.8 | 91.7 | | HNO3 (3.0 mol L−1) | 100.2 | 100.4 | 99.5 | 99.2 | 95.8 | 99.6 | 98.9 |
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of eluent was 5 mL; all solutions were in acetone.
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