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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

GSCNI/2024

Chard

Nitrates in Fruits and Vegetables

M1: NITRATES (mg/kg)

GSCTOX-7/2024

Corn-Based Breakfast Cereals

MYCOTOXINS IN FOOD

M1: Deoxynivalenol (DON) (µg/kg), Fumonisin B1 (µg/kg), Fumonisin B2 (µg/kg), Sum of Fumonisins B1 and B2 (µg/kg)

OLIVE OIL-1/2024

Olive oil

OLIVE OIL: QUALITY PARAMETERS

M1: K232 (-), K268 (-)*, K270 (-), Delta-K (-), Total acidity (% oleic acid), Peroxides (meq O2/kg), Ethyl esters (mg/kg)

M2A: K232 (-), K268 (-)*, K270 (-), Delta-K (-), Total acidity (% oleic acid), Peroxides (meq O2/kg), Ethyl esters (mg/kg)

M2B: Moisture (%), Impurities (%)

OLIVE OIL-1/2025

OLIVE OIL

OLIVE OIL QUALITY PARAMETERS

M1: K232 (-), K268 (-), K270 (-), Delta-K (-), Total acidity (% oleic acid), Peroxides (meq O₂/kg), Ethyl esters (mg/kg)

M2A: K232 (-), K268 (-), K270 (-), Delta-K (-), Total acidity (% oleic acid), Peroxides (meq O₂/kg), Ethyl esters (mg/kg),

M2B: Moisture (%), Impurities (%)

OLIVE OIL-2 2024

Olive Oil

Olive Oil. Purity Parameters

ACEITE DE OLIVA – PARÁMETROS DE PUREZA

M1: Ácido láurico (12:0) (%), Ácido mirístico (14:0) (%), Ácido palmítico (16:0) (%), Ácido palmitoleico (16:1) (%), Ácido heptadecanoico (17:0) (%), Ácido heptadecenoico (17:1) (%), Ácido esteárico (18:0) (%), Ácido oléico (18:1) (%), Ácido linoléico (18:2) (%), Ácido linolénico (18:3) (%), Ácido araquídico (20:0) (%), Ácido eicosenoico (20:1) (%), Ácido behénico (22:0) (%), Ácido erúcico (22:1) (%), Ácido lignocérico (24:0) (%), Isómeros trans oléicos (%), Isómeros trans linoleicos + linolénicos (%), Colesterol (%), Brasicasterol (%), Campesterol (%), Estigmasterol (%), Delta-7-estigmastenol (%), Beta-sitosterol (%), Beta-sitosterol aparente (%), Esteroles totales (mg/kg), Monopalmitato de 2-glicerilo (%), Ceras (C40+C42+C44+C46) (mg/kg), Ceras (C42+C44+C46) (mg/kg), Diferencia ECN-42 (-), Eritrodiol + Uvaol (%), Alcoholes alifáticos totales (mg/kg), Estigmastadienos (mg/kg), Insaponificable (%), Relación 1:2/1:3 diglicéridos (%), Valor real ECN-42 (-). M2: Ácido láurico (12:0) (%), Ácido mirístico (14:0) (%), Ácido palmítico (16:0) (%), Ácido palmitoleico (16:1) (%), Ácido heptadecanoico (17:0) (%), Ácido heptadecenoico (17:1) (%), Ácido esteárico (18:0) (%), Ácido oléico (18:1) (%), Ácido linoléico (18:2) (%), Ácido linolénico (18:3) (%), Ácido araquídico (20:0) (%), Ácido eicosenoico (20:1) (%), Ácido behénico (22:0) (%), Ácido erúcico (22:1) (%), Ácido lignocérico (24:0) (%), Isómeros trans oléicos (%), Isómeros trans linoleicos + linolénicos (%), Colesterol (%), Brasicasterol (%), Estigmasterol (%), Delta-7-estigmastenol (%), Beta-sitosterol (%), Beta-sitosterol aparente (%), Esteroles totales (mg/kg), Monopalmitato de 2-glicerilo (%), Ceras (C40+C42+C44+C46) (mg/kg), Ceras (C42+C44+C46) (mg/kg), Diferencia ECN-42 (-), Eritrodiol + Uvaol (%), Alcoholes alifáticos totales (mg/kg), Estigmastadienos (mg/kg), Insaponificable (%), Relación 1:2/1:3 diglicéridos (%)*, Valor real ECN-42 (-).

OLIVE OIL-2/2025

OLIVE OIL

OLIVE OIL – PURITY PARAMETERS

M1: Lauric acid (12:0) (%), Myristic acid (14:0) (%), Palmitic acid (16:0) (%), Palmitoleic acid (16:1) (%), Heptadecanoic acid (17:0) (%), Heptadecenoic acid (17:1) (%), Stearic acid (18:0) (%), Oleic acid (18:1) (%), Linoleic acid (18:2) (%), Linolenic acid (18:3) (%), Arachidic acid (20:0) (%), Eicosenoic acid (20:1) (%), Behenic acid (22:0) (%), Erucic acid (22:1) (%), Lignoceric acid (24:0) (%), Trans-oleic isomers (%), Trans-linoleic + linolenic isomers (%), Cholesterol (%), Brassicasterol (%), Campesterol (%), Stigmasterol (%), Delta-7-stigmastenol (%), Beta-sitosterol (%), Apparent beta-sitosterol (%), Total sterols (mg/kg), 2-Monopalmitoyl glycerol (%), Waxes (C40+C42+C44+C46) (mg/kg), Waxes (C42+C44+C46) (mg/kg), ECN-42 difference (-), Erythrodiol + Uvaol (%), Total aliphatic alcohols (mg/kg), Stigmastadienes (mg/kg), Unsaponifiables (%), 1:2 / 1:3 diglyceride ratio (%), Actual ECN-42 value (-)

M2: Lauric acid (12:0) (%), Myristic acid (14:0) (%), Palmitic acid (16:0) (%), Palmitoleic acid (16:1) (%), Heptadecanoic acid (17:0) (%), Heptadecenoic acid (17:1) (%), Stearic acid (18:0) (%), Oleic acid (18:1) (%), Linoleic acid (18:2) (%), Linolenic acid (18:3) (%), Arachidic acid (20:0) (%), Eicosenoic acid (20:1) (%), Behenic acid (22:0) (%), Erucic acid (22:1) (%), Lignoceric acid (24:0) (%), Trans-oleic isomers (%), Trans-linoleic + linolenic isomers (%), Cholesterol (%), Brassicasterol (%), Campesterol (%), Stigmasterol (%), Delta-7-stigmastenol (%), Beta-sitosterol (%), Apparent beta-sitosterol (%), Total sterols (mg/kg), 2-Monopalmitoyl glycerol (%), Waxes (C40+C42+C44+C46) (mg/kg), Waxes (C42+C44+C46) (mg/kg), ECN-42 difference (-), Erythrodiol + Uvaol (%), Total aliphatic alcohols (mg/kg), Stigmastadienes (mg/kg), Unsaponifiables (%), 1:2 / 1:3 diglyceride ratio (%), Actual ECN-42 value (-)

OLIVE OIL-3/2024

Olive Oil

Olives Oil

MA: ARSENIC (mg/kg) (1), CADMIUM (mg/kg), MERCURY (mg/kg) (1), LEAD (mg/kg) (1)

MB: Benzo(a)anthracene (µg/kg) (2), Benzo(a)pyrene (µg/kg), Benzo(b)fluoranthene (µg/kg), Chrysene (µg/kg) (1), Acetamiprid (µg/kg) (2), Chlorpyrifos (µg/kg) (1), Chlorpyrifos-methyl (µg/kg) (2), Ethion (µg/kg) (2), Phenthoate (µg/kg) (2), Propamocarb (µg/kg) (2), Propoxur (µg/kg) (1)

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91 551 92 52  –  gscsal@gscsal.com