220.127.116.11.8.2. Residue analyses
Residue analyses of the previously mentioned matrices should be performed for both treatment and control colonies. Two different analyses could be envisaged, one specific on the AI under study for which the lowest possible LOD and LOQ should be used, and a multi-residue analysis of the most common AI used in the area. The former should be systematically performed when conducting field studies. We do not provide a method for residue analyses as such analyses are typically outsourced to analytical labs.