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International Journal of Analytical Chemistry
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International Journal of Analytical Chemistry
/
2015
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Article
/
Tab 4
/
Research Article
Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages
Table 4
Matrix obtained during optimization design for the MSPE system.
Experiment
(mL)
(mL)
(mg)
(M)
% recovery
1
10.0
1.0
50
0.0025
6.66
2
10.0
2.0
75
0.025
23.48
3
10.0
3.0
100
0.25
27.74
4
20.0
1.0
75
0.25
99.95
5
20.0
2.0
100
0.0025
7.49
6
20.0
3.0
50
0.025
44.10
7
30.0
1.0
100
0.025
31.59
8
30.0
2.0
50
0.25
90.58
9
30.0
3.0
75
0.0025
24.19