Fast Simultaneous Determination of Eight Sudan Dyes in Chili Oil by Ultra-High-Performance Supercritical Fluid Chromatography

Figure 2

The chromatograms (480 nm) of eight Sudan dyes processed by Acquity UPC² BEH (a), Acquity UPC² BEH 2-EP (b), Acquity UPC² CSH FP (c), and Acquity UPC² HSS C18 SB (d): (A), Sudan I; (B), Para red; (C), Sudan II; (D), Sudan red G; (E), Sudan III; (F), Sudan red 7B; (G), Sudan red B; (H), Sudan IV.

(a)

(b)

(c)

(d)