Do you need control materials to validate your methods or carry out your quality control?

In addition to organizing proficiency testing schemes, we provide you with leftover samples from proficiency testing rounds in the agri-food and environmental fields. These are available for laboratories that wish to develop internal quality controls with safe samples. All of them come with a certificate that includes:

  • Assigned value and associated uncertainty, and the number of laboratories assigning it
  • Details about the nature of the sample, representative of the matrices commonly analyzed

GSCA-2/2025

Continental waters

Drinking water

MB: TOTAL CYANIDES (µg/L).

MC: ALKALINITY (mg/L CaCO3), BICARBONATES (mg/L CaCO3), CALCIUM (mg/L Ca), CARBONATES (mg/L CaCO3), CHLORIDES (mg/L), CONDUCTIVITY AT 20 ºC (µS/cm), HARDNESS (mg/L CaCO3), LANGELIER INDEX (-), MAGNESIUM (mg/L Mg), NITRATES (mg/L), NITRITES (mg/L), pH (upH), POTASSIUM (mg/L), DRY RESIDUE AT 180 ºC (mg/L), SODIUM (mg/L), SULFATES (mg/L SO4)

GSCCA-1/2025

Fishery Product (Crab Meat)

Food Preservatives

M1: SODIUM METABISULFITE (SULFUR DIOXIDE) (MG/KG SO₂)