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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  1. Benzoic Acid Reference Standard, OAS R63005.001G
    Benzoic Acid Reference Standard, OAS R63005.001G Product No: R63005.001G
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  2. Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66012.050G
    Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66012.050G Product No: R66012.050G
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  3. Isatin Reference Standard, OAS R66020.001G
    Isatin Reference Standard, OAS R66020.001G Product No: R66020.001G
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  4. Acetanilide Reference Standard, OAS R66005.002G
    Acetanilide Reference Standard, OAS R66005.002G Product No: R66005.002G
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  5. 2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.002G
    2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.002G Product No: R68005.002G
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  6. Sulphamethazine Reference Standard, OAS R68025.001G
    Sulphamethazine Reference Standard, OAS R68025.001G Product No: R68025.001G
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  7. Anthracene Reference Standard, OAS R62005.001G
    Anthracene Reference Standard, OAS R62005.001G Product No: R62005.001G
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  8. Imidazole Reference Standard, OAS R65005.001G
    Imidazole Reference Standard, OAS R65005.001G Product No: R65005.001G
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  9. Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66011.001G
    Ethylenediaminetetra-acetic Acid (EDTA) Ref Standard, OAS R66011.001G Product No: R66011.001G
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  10. 2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.001G
    2,5-Bis(5-tert-butyl-2-benzo-oxazol-2-yl)thiophene Std, OEA R68005.001G Product No: R68005.001G
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  11. L-Cystine Reference Standard, OAS R68010.001G
    L-Cystine Reference Standard, OAS R68010.001G Product No: R68010.001G
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  12. Methionine Reference Standard, OAS R68015.001G
    Methionine Reference Standard, OAS R68015.001G Product No: R68015.001G
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  13. Aspartic Acid Reference Standard, OAS R66025.001G
    Aspartic Acid Reference Standard, OAS R66025.001G Product No: R66025.001G
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  14. Urea Reference Standard, OAS R66017.001G
    Urea Reference Standard, OAS R66017.001G Product No: R66017.001G
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  15. Acetanilide Reference Standard, OAS R66005.001G
    Acetanilide Reference Standard, OAS R66005.001G Product No: R66005.001G
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  16. Alanine Reference Standard, OAS R66010.001G
    Alanine Reference Standard, OAS R66010.001G Product No: R66010.001G
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  17. Sulphanilamide Reference Standard, OAS R68020.001G
    Sulphanilamide Reference Standard, OAS R68020.001G Product No: R68020.001G
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  18. Benzoic Acid Reference Standard, OAS R63005.002G
    Benzoic Acid Reference Standard, OAS R63005.002G Product No: R63005.002G
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  19. Acetanilide Reference Standard, OAS R66005.005G
    Acetanilide Reference Standard, OAS R66005.005G Product No: R66005.005G
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  20. Caffeine Reference Standard, OAS R66030.001G
    Caffeine Reference Standard, OAS R66030.001G Product No: R66030.001G
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  21. 8-Hydroxyquinoline Reference Standard, OAS R66040.001G
    8-Hydroxyquinoline Reference Standard, OAS R66040.001G Product No: R66040.001G
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  22. Sulphanilamide Reference Standard, OAS R68020.002G
    Sulphanilamide Reference Standard, OAS R68020.002G Product No: R68020.002G
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  23. Dibenzyldisulphide Reference Standard, OAS R64005.001G
    Dibenzyldisulphide Reference Standard, OAS R64005.001G Product No: R64005.001G
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  24. Urea Nitrogen Reference Standard, OAS R66018.025G
    Urea Nitrogen Reference Standard, OAS R66018.025G Product No: R66018.025G
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  25. Atropine Reference Standard, OAS R66045.001G
    Atropine Reference Standard, OAS R66045.001G Product No: R66045.001G
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  26. 3-Chlorobenzoic Acid Reference Standard, OAS R67010.001G
    3-Chlorobenzoic Acid Reference Standard, OAS R67010.001G Product No: R67010.001G
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  27. 4-Fluorobenzoic Acid Reference Standard, OAS R67025.001G
    4-Fluorobenzoic Acid Reference Standard, OAS R67025.001G Product No: R67025.001G
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  28. Methionine Reference Standard, OAS R68015.010G
    Methionine Reference Standard, OAS R68015.010G Product No: R68015.010G
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  29. Enriched Phenanthrene Reference Standard, OAS R69005.001G
    Enriched Phenanthrene Reference Standard, OAS R69005.001G Product No: R69005.001G
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  30. Phenanthrene Reference Standard, OAS R69006.001G
    Phenanthrene Reference Standard, OAS R69006.001G Product No: R69006.001G
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  31. Sulphamic Acid Reference Standard, OAS R69010.001G
    Sulphamic Acid Reference Standard, OAS R69010.001G Product No: R69010.001G
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  32. Cyclohexanone-2,4-dinitrophenylhydrazone Ref Standard, OAS R66015.001G
    Cyclohexanone-2,4-dinitrophenylhydrazone Ref Standard, OAS R66015.001G Product No: R66015.001G
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  33. Phenacetin Reference Standard, OAS R66035.001G
    Phenacetin Reference Standard, OAS R66035.001G Product No: R66035.001G
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  34. Atropine Reference Standard, OAS R66045.010G
    Atropine Reference Standard, OAS R66045.010G Product No: R66045.010G
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  35. Triphenylphosphine Reference Standard, OAS R67020.001G
    Triphenylphosphine Reference Standard, OAS R67020.001G Product No: R67020.001G
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  36. Benzylthiuronium Chloride Reference Standard, OAS R67205.001G
    Benzylthiuronium Chloride Reference Standard, OAS R67205.001G Product No: R67205.001G
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