Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

Table 7

Contents of tartrazine (mean and %RSD, = 3) in real samples determined with the proposed methodology and comparison with HPLC reference method.

Sample	[Tartrazine] (mg L^−1)
	MSPE-UV	HPLC
1	5.5 (1.3)	5.4
2	22.7 (0.8)	22.4
3	5.9 (1.8)	5.7
4	22.8 (2.3)	23.0
5	5.5 (2.6)	5.7