Figure 1.

Extraction chamber (EC), composed by a polypropylene disk holder (A) with 25 mm of internal diameter containing a Fluoropore™ membrane filter (polytetrafluoroethylene), with a 1.0 µm pore, and by a Millex^® syringe filter (polyvinyl chloride housing and polyvinylidene fluoride membrane), with a 5.0 µm pore (B). Dry dog food sample is placed inside the EC, as indicated by the arrow, through the wide opening of the disk holder (Supplementary Information, Figure S1).