Table 3. Inter-lab validation of Method 2 for quantification of flunixin and 5-hydroxy flunixin in milk
Target
Linearity (r
2
)
Fortification (μg/kg)
Recovery (%)
Intra-lab CV (%)
Flunixin
0.9991
10
99.6
3.0
20
99.1
3.9
40
97.2
2.2
5-Hydroxy flunixin
0.9993
10
101
4.1
20
93.6
0.7
40
84.6
8.4
CV, coefficient of variation.