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-2/2024

Quince

Preservatives in Food

M1: Sodium metabisulfite (Sulfur dioxide) (mg/kg SO2)

GSCMEAT/2024

Turkey breast

M1A: Water activity, Ashes (%), Total phosphorus (mg/kg P2O5), C16:0 Palmitic acid (%), C16:1 Palmitoleic acid (%)*, C18:1 Oleic acid (%), C18:2n6 Linoleic acid (%), C18:3n3 Linolenic acid (%)*, Monounsaturated fatty acids (%), Polyunsaturated fatty acids (%), Saturated fat (%), Fat (%), Carbohydrates (%), Hydroxyproline (%)*, Moisture (%)(1), pH (pH units), Crude protein (N% x 6.25) (%), Salt (g/100g NaCl), Sodium (%), Energy value (kcal/100g)

M1B: Nitrates (mg/kg Sodium nitrate), Nitrites (mg/kg Sodium nitrite)(1)

GSCTOX-5/2024

Raisins

MYCOTOXINS IN FOOD

M1: Ochratoxin A (µg/kg)(1)

GSCWINE-3/2024

White wine

Wines, Quality Parameters

M1A: Total acidity* (g tartaric/L), Volatile acidity* (g acetic/L), Reducing sugars* (g/L), Dry extract* (g/L), Fructose* (g/L), Glucose* (g/L), Alcohol content* (% vol), Density at 20ºC* (g/mL), pH*

M1B: Citric acid* (g/L), L-malic acid* (g/L), Sorbic acid* (mg/L), Free sulfur dioxide* (1) (mg/L), Total sulfur dioxide* (1) (mg/L)