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.
Antibiotics - IR Identification PT, Proficiency Testing Material, Supelco®
Supplier: Merck
Antibiotics - IR Identification PT, Proficiency Testing Material
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Phenolics c/V sample 1, (CRM), Supelco®
Supplier: Merck
Phenolics C/V Sample 1, Supelco®, Certified reference material, : N/A
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Trihalomethane Mixes, Supelco®
Supplier: Merck
Trihalomethane Mix, Supelco®, : N/A, 10× 1,2 ml
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Total Organic Carbon (TOC) PT, Proficiency Testing Material, Supelco®
Supplier: Merck
Total Organic Carbon (TOC) PT, Proficiency Testing Material
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Nitrite, (CRM), Supelco®
Supplier: Merck
Nitrite, Supelco®, Certified reference material, : N/A
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Clean Clay Loam, (CRM), Supelco®
Supplier: Merck
Clean Clay Loam, Supelco®, : N/A
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Herbicides in Soil - PT, Proficiency Testing Material, Supelco®
Supplier: Merck
Herbicides in Soil - PT, Supelco®, Proficiency Testing Material, : N/A
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Complex Nutrients, (CRM), Supelco®
Supplier: Merck
Complex Nutrients, Supelco®, Certified reference material
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Trihalomethanes - WS, (CRM), Supelco®
Supplier: Merck
Trihalomethanes - WS, Supelco®, Certified reference material, : N/A
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Nutrients in soil, (CRM), Supelco®
Supplier: Merck
Nutrients in Soil, Supelco®, Certified reference material, : N/A
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Settleable Solids - WP, (CRM), Supelco®
Supplier: Merck
Settleable Solids - WP, Supelco®, Certified reference material, : N/A
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Volatile residue - WP, (CRM), Supelco®
Supplier: Merck
Volatile Residue - WP, Supelco®, Certified reference material, : N/A
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Phthalates - PT, Proficiency Testing Material, Supelco®
Supplier: Merck
Phthalates - PT, Supelco®, Proficiency Testing Material, : N/A
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Chromium VI - Soil, (CRM), Supelco®
Supplier: Merck
Chromium VI - Soil, Supelco®, Certified reference material, : N/A
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Organophosphorus pesticides (low level) - PT, proficiency testing material, Supelco®
Supplier: Merck
Organophosphorus Pesticides (Low Level) - PT, Supelco®, Proficiency Testing Material, : N/A
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Nitrosamines/nitroaromatics - WP, proficiency testing material, Supelco®
Supplier: Merck
Nitrosamines/Nitroaromatics - WP, Supelco®, Proficiency Testing Material, Concentrate for dilution to 1L, : N/A
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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 8, 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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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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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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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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Inland silverside (Menidia beryllina), 48-hr acute, nonrenewal, 25 °C, SSW, Supelco®
Supplier: Merck
Inland silverside (Menidia beryllina), 48-hr Acute, nonrenewal, 25 °C, SSW
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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