+34 91 551 92 52  –  gscsal@gscsal.com

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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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GSC JUICE/2024

Orange juice

JUICE

M1A: Total acidity (g citric acid/100 mL)(1), Total sugars (%)(1), Density (20ºC/20ºC)(1), Fructose (mg/100 mL)(1), Glucose (mg/100 mL)(1), Brix degrees at 20ºC (°Brix), Sucrose (mg/100 mL)(1)

M1B: Sulfur dioxide (mg/L)(1)

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)

GSCMPA-2 2023

Fresh spinach

Heavy metals in foods

M1: Arsenic (mg/kg), Cadmium (mg/kg), Copper (mg/kg), Chromium (mg/kg), Tin (mg/kg), Iron (mg/kg), Mercury (mg/kg), Lead (mg/kg), Selenium (mg/kg), Zinc (mg/kg)

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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91 551 92 52  –  gscsal@gscsal.com