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