Reference Standards
OEA Labs' Organic Analytical Reference Standards are selected for long term stability and are not subject to ambient influences. They are intended for daily routine use as certified working standards which are referenced back to traceable internationally recognised standards.
Although these standards do not require preliminary drying, it is good practice to store them between 20oC to 25oC, tightly sealed away from light and moisture unless otherwise stated.
Our standards are manufactured and purified to allow certification values close to theoretical. After a comprehensive standardisation procedure in our laboratories they are released with a certificate of analysis. The uncertainty of the certified value is expressed as expanded uncertainty, U, at 95% confidence and is calculated in accordance with ISO/IEC17025 according to GUM (Guidelines to Uncertainty in Measurement). Confidence limits include those due to sampling variation, weighing, calibration and measurement errors.
If you need a material (chemical or ’natural’) which is not listed, please contact us. We can certify these for your particular application for use as QC or calibration references.
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Benzoic Acid Reference Standard, OAS R63005.001G Product No: R63005.001G -
Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66012.050G Product No: R66012.050G -
Isatin Reference Standard, OAS R66020.001G Product No: R66020.001G -
Caffeine Reference Standard, OAS R66030.001G Product No: R66030.001G -
Dibenzyldisulphide Reference Standard, OAS R64005.001G Product No: R64005.001G -
Acetanilide Reference Standard, OAS R66005.001G Product No: R66005.001G -
Acetanilide Reference Standard, OAS R66005.002G Product No: R66005.002G -
Atropine Reference Standard, OAS R66045.001G Product No: R66045.001G -
3-Chlorobenzoic Acid Reference Standard, OAS R67010.001G Product No: R67010.001G -
2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.002G Product No: R68005.002G -
Sulphamethazine Reference Standard, OAS R68025.001G Product No: R68025.001G -
Sulphamic Acid Reference Standard, OAS R69010.001G Product No: R69010.001G -
Anthracene Reference Standard, OAS R62005.001G Product No: R62005.001G -
Imidazole Reference Standard, OAS R65005.001G Product No: R65005.001G -
Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66011.001G Product No: R66011.001G -
Cyclohexanone-2,4-dinitrophenylhydrazone Ref Standard, OAS R66015.001G Product No: R66015.001G -
Phenacetin Reference Standard, OAS R66035.001G Product No: R66035.001G -
Benzylthiuronium Chloride Reference Standard, OAS R67205.001G Product No: R67205.001G -
2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.001G Product No: R68005.001G -
L-Cystine Reference Standard, OAS R68010.001G Product No: R68010.001G -
Methionine Reference Standard, OAS R68015.001G Product No: R68015.001G -
Aspartic Acid Reference Standard, OAS R66025.001G Product No: R66025.001G -
Urea Reference Standard, OAS R66017.001G Product No: R66017.001G -
Alanine Reference Standard, OAS R66010.001G Product No: R66010.001G -
Sulphanilamide Reference Standard, OAS R68020.001G Product No: R68020.001G -
NC Soil Standard 338 40025 5g R69100.005G Product No: R69100.005G -
NCS Soil Standard 338 40026 2 g R69105.002G Product No: R69105.002G
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Algae (Bladderwrack) Standard 30 g R69120.030G Product No: R69120.030G
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Lubricant Standard 33835240 2 g R69125.002G Product No: R69125.002G
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IRMS Reference Material EMA P2 Standard 3 g R60630.003G Product No: R60630.003G
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Wheat Flour IRMS Standard OAS/Isotope 5 g R60600.005G Product No: R60600.005G
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Protein IRMS Standard OAS/Isotope 5 g R60610.005G Product No: R60610.005G
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Gelatin IRMS standard for 13C 15N 18O 34S 2 g R60620.002G Product No: R60620.002G
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Soil Standard (Chalky) 30 g R69110.030G Product No: R69110.030G
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Soil Standard (Peaty) 30 g R69115.030G Product No: R69115.030G
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Sorghum Flour IRMS Standard OAS/Isotope 5 g R60590.005G Product No: R60590.005G