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

Table 1

The linear range, slope, intercept, correlation coefficient, LOD, and LOQ of eight Sudan dyes.

Dyes	Linear rang (μg/mL)	Slope	Intercept	r^2	LOD (mg/kg)	LOQ (mg/kg)
Sudan I	0.5–50	2.72 × 10^3 ± 51.4	−1.78 × 10^2 ± 3.4	0.9995	0.15	0.50
Para red	0.5–50	3.17 × 10^3 ± 39.2	−4.60 × 10^2 ± 8.5	0.9997	0.15	0.50
Sudan II	0.5–50	2.76 × 10^3 ± 48.5	−1.18 × 10^2 ± 2.3	0.9998	0.15	0.50
Sudan red G	0.5–50	3.72 × 10^3 ± 29.7	−1.18 × 10^2 ± 1.9	0.9994	0.20	0.60
Sudan III	1.0–50	3.52 × 10^3 ± 40.3	−5.87 × 10^2 ± 10.6	0.9995	0.20	0.60
Sudan red 7B	0.6–50	4.09 × 10^3 ± 80.7	−6.86 × 10^2 ± 10.8	0.9995	0.15	0.50
Sudan red B	0.3–50	8.40 × 10^3 ± 77.6	2.91 × 10^2 ± 5.7	0.9997	0.10	0.30
Sudan IV	1.0–50	2.58 × 10^3 ± 19.8	−4.48 × 10^2 ± 6.0	0.9999	0.30	1.00