The CNA collaborates with the Reference European Laboratories participating in their meetings and the intercomparison tests that they carry out in:

• fruit and vegetables (University of Almería/Agricultural Laboratory of the Generalitat Valenciana)
• cereals (Fødevareinstituttet Danmarks Tekniske Universitet)
• samples of animal origin (Chemisches und Veterinäruntersuchungsamt CVUA Freiburg) y
• individual methods (Chemisches und Veterinäruntersuchungsamt CVUA Stuttgart)

Accredited analytical methods:

• Multi-residue in fruit and vegetables by gas chromatography/mass spectrometry
• Multi-residue in fruit and vegetables by liquid chromatography/mass spectrometry
• Multi-residue in cereals by gas chromatography/mass spectrometry
• Multi-residue in cereals by liquid chromatography/mass spectrometry
• Multi-residue in samples of animal origin by gas chromatography/mass spectrometry
• Multi-residue in samples of animal origin by liquid chromatography/mass spectrometry
• Multi-residue in animal fat by gas chromatography/mass spectrometry

Since they are methods accredited in accordance with Standard UNE-EN-ISO/IEC 17025 and Technical Note 19 of ENAC (flexible scope), as categories for testing fruit and vegetables, cereals and samples of animal origin, there is the ability to check any pesticide/matrix necessary for facing the potential alerts that appear in this field.