Simultaneous Determination of Sunset Yellow FCF, Allura Red AC, Quinoline Yellow WS, and Tartrazine in Food Samples by RP-HPLC

Table 4

Limits of detection (LOD), dynamic range (LOQ-LOL), calibration equations, and coefficients of determination (R²) of all dyes.

Dye (C.I. numbers)	LOD (mg L^−1)	LOQ-LOL (mg L^−1)	Calibration equation	R^2
Tartrazine (E 102)	0.24	0.72–50	y = 63.603x − 2.304	0.999
Sunset Yellow FCF (E 110)	0.25	0.75–10	y = 54.578x − 9.839	0.999
Allura Red AC (E 129)	0.23	0.69–50	y = 73.621x − 9.762	0.999
Quinoline Yellow WS (E 104 I)	0.08	0.24–50	y = 21.435x − 4.891	0.999