Research Article
Fast Simultaneous Determination of Eight Sudan Dyes in Chili Oil by Ultra-High-Performance Supercritical Fluid Chromatography
Table 2
The recovery, intraday, and interday RSD of eight Sudan dyes.
| | Dyes | Spiking level (mg/kg) | Mean recovery (%) | Intraday RSD (%) | Interday RSD (%) |
| | Sudan I | 1 | 96.6 | 6.7 | 8.6 | | 5 | 102.5 | 5.2 | 5.4 | | 25 | 98.2 | 3.8 | 6.2 |
| | Para red | 1 | 99.5 | 4.0 | 5.4 | | 5 | 97.3 | 6.4 | 4.3 | | 25 | 96.9 | 4.2 | 6.6 |
| | Sudan II | 1 | 108.3 | 2.1 | 5.0 | | 5 | 101.5 | 1.6 | 5.4 | | 25 | 103.7 | 4.1 | 4.8 |
| | Sudan red G | 1 | 98.5 | 3.2 | 4.1 | | 5 | 99.2 | 2.0 | 4.0 | | 25 | 106.4 | 2.5 | 4.7 |
| | Sudan III | 1 | 95.5 | 5.8 | 4.9 | | 5 | 94.6 | 3.2 | 6.0 | | 25 | 98.3 | 6.2 | 5.8 |
| | Sudan red 7B | 1 | 93.8 | 6.3 | 7.0 | | 5 | 96.5 | 3.5 | 6.6 | | 25 | 97.9 | 4.4 | 5.9 |
| | Sudan red B | 1 | 82.6 | 6.9 | 8.1 | | 5 | 88.9 | 8.0 | 8.6 | | 25 | 90.1 | 4.2 | 6.7 |
| | Sudan IV | 1 | 96.3 | 4.6 | 5.1 | | 5 | 98.9 | 5.2 | 6.1 | | 25 | 105.2 | 4.0 | 5.8 |
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