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