Table 4. Matrix effect (ME) of flunixin and 5-hydroxy flunixin for 4 livestock and 2 fishery products by Method 1
| Variable | Flunixin | 5-Hydroxy flunixin |
| Slope | ME% | Class | Slope | ME% | Class |
| Solvent | 993,371.5 | | | 136,638.3 | | |
| Milk | 844,357.0 | –15.0 | No effect | 103,543.5 | –24.2 | Medium |
| Beef | 187,881.6 | –81.1 | Strong | 4,302.4 | –96.9 | Strong |
| Chicken | 1,665,518.6 | 67.7 | Strong | 258,806.7 | 89.4 | Strong |
| Egg | 1,966,821.5 | 98.0 | Strong | 227,537.8 | 66.5 | Strong |
| Flatfish | 1,801,178.7 | 81.3 | Strong | 275,312.2 | 101.5 | Strong |
| Shrimp | 1,805,141.4 | 81.7 | Strong | 223,522.6 | 63.6 | Strong |