Determination of Sunset Yellow and Tartrazine in Food Samples by Combining Ionic Liquid-Based Aqueous Two-Phase System with High Performance Liquid Chromatography

Table 1

Analytical figures of merit for Ta and SY using HPLC-UV method.

Analyte	Slope of the calibration graph; ±SD ()	Correlation coefficient	Limit of detection; (ng/mL)	Intraday precision; RSD (%) ()^b	Interday precision; RSD (%) ()^a
Ta	751.36 ± 2.14	0.9975	5.2	3.2	5.6
SY	838.51 ± 1.23	0.9967	6.9	2.4	4.8

three independent calibration graphs obtained in three different days.
^bconcentration of analyte was 0.5 g mL.