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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

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GSCAR-1 2025

Wastewater

Wastewater

MA: COPPER (mg/L), TOTAL CHROMIUM (µg/L Cr), COD (mg O2/L), PHOSPHATES (mg/L), FLUORIDES (mg/L), TOTAL PHOSPHORUS (mg/L P), IRON (mg/L Fe), MERCURY (µg/L Hg), NITRATES (mg/L), AMMONIUM NITROGEN (mg/L N), KJELDAHL NITROGEN (mg/L N), TOTAL NITROGEN (mg/L N)

MB: CHLORIDES (mg/L as chloride ion), CONDUCTIVITY AT 25ºC (µS/cm), BOD5 (mg O2/L), pH (upH)

MC: SUSPENDED SOLIDS (mg/L)

GSCAR-2 2024

Wastewater

Aguas residuales

MA: ARSENIC (mg/L), CADMIUM (mg/L), COT (mg/L), ANIONIC DETERGENTS (mg Sodium Lauryl Sulfate/L)(1), COD (mg O2/L), PHENOLS (mg/L)(1), LEAD (mg/L),

MB: CHROMIUM VI (mg/L)(1)

MC: BOD5 (mg O2/L)(1)(3), pH (upH)(2)

MD: CHLORIDES (mg/L), CONDUCTIVITY AT 25 ºC (mS/cm)(2), SUSPENDED SOLIDS (mg/L)(4)

ME: CATIONIC DETERGENTS (mg/L)(1)

GSCAR-3/2024

Wastewater

WASTEWATER

MA: COD (mg O2/L)(5), TOTAL PHOSPHORUS (mg/L P), MERCURY (µg/L Hg), NICKEL (µg/L), KJELDAHL NITROGEN (mg/L N), ZINC (µg/L)

MB: CONDUCTIVITY AT 25 ºC (µS/cm) (3), BOD5 (mg O2/L) (1)(2), PH (upH) (3)

MC: SUSPENDED SOLIDS (mg/L) (4)

ME: BARIUM (mg/L), TIN (mg/L)

GSCAR-4 2024

Wastewater

Wastewater

M1: TOXICITY (INHIBITORY SUBSTANCES), EQUITOX

M2: TOXICITY (INHIBITORY SUBSTANCES), EQUITOX

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)

GSCSLU/2024

Sludge

M1: Total calcium (% (CaO) d.w.)* Conductivity at 25ºC (1:5) (µS/cm)* Total phosphorus (% (P2O5) d.w.)* Iron (mg/kg d.w.)* Total magnesium (% (MgO) d.w.)* Organic matter (% d.w.) Dry matter (%) Kjeldahl nitrogen* (% d.w.)* pH (1:5) (in aqueous extract) (pH units)* Total potassium (% (K2O) d.w.)*

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