Table 1 Effect of the type, concentration, and volume of the elution solution on the recovery of Cd, Cu, and Pb ions [sample volume, 50 mL; amount of the metals 10 μg of Cd, Cu, and Pb; pH 8 for Cd, Cu, and Pb]
Element | Type of eluent | Volume (mL) | Concentration (mmol mL− 1) | R%a |
|---|---|---|---|---|
Cd | HCl | 5 | 1 | 86 |
10 | 1 | 99 | ||
HNO3 | 5 | 1 | 82 | |
10 | 1 | 94 | ||
Cu | HCl | 5 | 1 | 84 |
10 | 1 | 97 | ||
HNO3 | 5 | 1 | 80 | |
10 | 1 | 90 | ||
Pb | HCl | 5 | 1 | 86 |
10 | 1 | 96 | ||
HNO3 | 5 | 1 | 78 | |
10 | 1 | 90 |