Determination of Sudan I and II in Food by High-Performance Liquid Chromatography after Simultaneous Adsorption on Nanosilica

Table 4

Recoveries from food samples.

Sample	Spike levels of Sudan I and Sudan II with the same concentration (mg·L^−1)
	0.010		0.050		0.100
	Sudan I	Sudan II	Sudan I	Sudan II	Sudan I	Sudan II
Dried meat 1	82.11 ± 1.45	81.11 ± 1.44	83.44 ± 1.49	85.24 ± 0.70	84.64 ± 1.49	100.73 ± 1.94
Dried meat 3	82.39 ± 1.48	81.78 ± 1.57	84.24 ± 1.93	83.72 ± 2.23	86.52 ± 1.59	84.46 ± 1.69
Snack 4	80.74 ± 1.36	82.40 ± 0.93	81.69 ± 1.42	84.93 ± 2.02	85.15 ± 2.74	92.39 ± 0.95