+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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GSCAS/2024

Seawater

High-Salinity Water

M1A: Chlorides (mg/L), Conductivity at 20ºC (mS/cm), Phosphates (mg/L as PO4), Total Phosphorus (mg/L P)(3), Nitrates (mg/L), Nitrites (mg/L)(1), Kjeldahl Nitrogen (mg/L N)*, pH (upH)(1)(2), Salinity (g/L)(3), Sulfates (mg/L)

M1B: Ammonium (mg/L)*, Arsenic (µg/L), Boron (mg/L)*, Copper (µg/L), Iron (µg/L), Mercury (µg/L), Nickel (µg/L), Lead (µg/L)

GSCMIA-6 2024

M1: Cured Cheese M2: Canned Tuna

M1: DETECTION OF STAPHYLOCOCCAL ENTEROTOXIN (P/N IN 25G)

M2: DETECTION OF STAPHYLOCOCCAL ENTEROTOXIN (P/N IN 25G)

GSCNI/2023

Lettuce

NITRATOS EN FRUTAS Y HORTALIZAS

M1: Nitrates (mg/kg)*

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)

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91 551 92 52  –  gscsal@gscsal.com