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Table 1 Effect of type and concentration eluting solution (4 mL) on analytes recovery (%)

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

Eluent

Recovery% (N = 5)a

Type

Concentration (mol L-1)

Cu(II)

Ni(II)

Cd(II)

Cr(III)

HCl

1.0

22 ± 2

33 ± 2

29 ± 2

15 ± 2

 

2.0

25 ± 1

70 ± 1

42 ± 1

29 ± 1

 

4.0

90 ± 3

92 ± 2

85 ± 2

31 ± 2

H2SO4

1.0

19 ± 1

25 ± 2

34 ± 1

32 ± 1

 

2.0

26 ± 3

32 ± 2

40 ± 1

36 ± 3

 

4.0

54 ± 2

47 ± 1

51 ± 2

43 ± 2

HNO3

1.0

98 ± 1

97 ± 1

99 ± 1

98 ± 1

 

2.0

98 ± 1

97 ± 1

99 ± 1

97 ± 1

 

4.0

96 ± 2

97 ± 2

98 ± 2

98 ± 2

 

1.0

36 ± 2

28 ± 2

20 ± 2

24 ± 2

HClO4

2.0

41 ± 1

28 ± 2

26 ± 1

26 ± 2

 

3.0

45 ± 2

28 ± 1

35 ± 2

26 ± 2

CH3COOH

1.0

9 ± 3

18 ± 2

9 ± 3

8 ± 2

 

2.0

12 ± 2

19 ± 2

11 ± 2

14 ± 2

 

4.0

13 ± 2

18 ± 1

12 ± 2

16 ± 2

  1. a Mean of five determinations ± standard deviation
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BMC Chemistry

ISSN: 2661-801X

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