You searched for: Standards

Meeting regulations in any industry, standards are essential for periodically checking the accuracy of equipment pieces. By comparing against the known values, output readings detect errors present and inform personnel adjustments are required. Once the settings of the manual or automatic instruments have returned to zero, the reestablished conditions will yield optimal working performance. Calibrating with concentrated standards eliminates the possibility that environmental changes will induce instrumental miscalculation when accuracy matters most.

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EPH matrix spike, certified reference material, Supelco®

Supplier: Merck

EPH matrix spike, Supelco®, 50 µg/ml in acetone

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Test mixture 2 for apolar capillary columns according to Grob, for GC, ready-to-use, Supelco®

Supplier: Merck

Test mixture 2 for apolar capillary columns according to Grob, Supelco®, for GC, ready-to-use, : N/A

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Trace metals - sandy loams, (CRM), Supelco®

Supplier: Merck

Trace Metals - Sandy Loam 7, Supelco®, Certified reference material, : N/A, Pkg of 50 g

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n-Paraffin Mix C10, C12, C14, C16, certified reference material, Supelco®

Supplier: Merck

n-Paraffin Mix C10, C12, C14, C16, Supelco®, (varied conc.)

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EPA 8270 nitrosamines mix, certified reference material, Supelco®

Supplier: Merck

EPA 8270 Nitrosamines Mix, Supelco®, Certified reference material, 2000 mug/mL each component in methanol, : N/A

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n-Paraffin Mix C18, C20, C22, C24, certified reference material, Supelco®

Supplier: Merck

n-Paraffin Mix C18, C20, C22, C24, Supelco®, 2 % (w/w) each component in octane

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Semivolatile Acids Surrogate Spike Mix, certified reference material, Supelco®

Supplier: Merck

Semivolatile Acids Surrogate Spike Mix, Supelco®, Certified reference material, 10000 mug/mL each component in methanol, : N/A

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EPA 8270/Appendix IX nitrosamines mix, certified reference material, Supelco®

Supplier: Merck

EPA 8270/Appendix IX Nitrosamines Mix, Supelco®, Certified reference material, 2000 mug/mL each component in methanol, : N/A

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BNA Surrogates Mixture

Supplier: EHRENSTORFER

Stable isotope labelled product type, mixture format, dichloromethane solvent.

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Gas Chromatography <621> PT, Proficiency Testing Material, Supelco®

Supplier: Merck

Gas Chromatography <621> PT, Proficiency Testing Material

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Daphnia pulex, Proficiency Testing Material, Supelco®

Supplier: Merck

Daphnia pulex, 48-hr Acute, nonrenewal, 25C, MHSF, Proficiency Testing Material

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Inland silverside (Menidia beryllina), proficiency testing material, Supelco®

Supplier: Merck

Inland silverside (Menidia beryllina), 7-day Chronic, daily renewal, SSW, Proficiency Testing Material

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Baking chocolate standard, NIST-2384

Supplier: PROMOCHEM

This reference material intended to use in validating methods for determining proximates, fatty acids, calories, vitamins, elements, catechins, caffeine, theobromine, and acrylamide in baking chocolate and similar matrices. It can be used for quality assurance in-house control materials.

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Combined density and refractometry standards

Supplier: METTLER TOLEDO

These combined reference standards are intended to reduce uncertainty, eliminate time-consuming and error prone sample transfer and facilitate fully automatic performance verification.