*2.8. Recovery and Precision*

To assess recovery and precision, blank tissue samples slurry (5 ± 0.1 g) were spiked with mixed standard working solutions of low, medium, and high concentration. These spiked samples at concentrations of 0.5 μg/kg, 5 μg/kg, and 50 μg/kg were processed and analyzed. The recovery and relative standard deviation (RSD) of the sample determination values were calculated, with RSD serving as an indicator of precision. The experiment was repeated for three batches to test inter-day precision.
