ccuracy of the method was checked by analyzing of blank muscle samples fortified with MG, LMG, or MG + LMG at levels of 2, 3, and 4 μg/kg. At each level, analyses were performed with 6 replicates. The mentioned analyses were carried out on two other occasions with the same instruments, but different operators and different batches of reagents. The recovery was calculated by the following formula: (the measured content/the fortified level) × 100. The precision (repeatability and within-laboratory reproducibility) was expressed as the relative standard deviation (RSD) of the recovery.