S.No | Experimental Parameter | % Enrichment | Chosen condition |
1 | Weight of the sorbent (mg) | 30 mg | |
10 mg | 78.57 | ||
20 mg | 86.36 | ||
30 mg | 99.99 | ||
50 mg | 99.99 | ||
2 | Preconcentration time (min) | 30 min | |
5 min | 73.8 | ||
15 min | 80.92 | ||
30 min | 99.99 | ||
45 min | 99.99 | ||
3 | Eluting agent | 1 mol∙L−1 HCl | |
1 mol∙L−1 HCl | 100 | ||
1 mol∙L−1 HNO3 | 85.71 | ||
1 mol∙L−1 H2SO4 | 83.33 | ||
4 | Volume of reagent (mL) | 0.5 mL | |
0.3 mL | 97.61 | ||
0.5 mL | 99.99 | ||
0.7 mL | 99.99 | ||
5 | Volume of acetic acid buffer (mL) | 1 mL | |
1 mL | 92.85 | ||
3 mL | 99.99 | ||
5 mL | 99.99 |