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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Tellurium standard solution, 1000 mg/L Te in 0,5 M nitric acid (from H₆TeO₆) Certipur® standard for AAS, Supelco®

Supplier: Merck

Tellurium Standard, 1000 mg/L, Certipur®, Supelco®, Tellurium, Matrix: 0,5 M HNO₃, Application: AAS standards

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Europium standard solution, 1000 mg/L Eu in dilute nitric acid (from Eu?O?) Certipur® standard for ICP, Supelco®

Supplier: Merck

Europium Standard, 1000 mg/L, Certipur®, Supelco®, Europium, Matrix: 2-3% HNO₃, Application: ICP standards

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Refractive index standards according to Ph. Eur., Supelco®

Supplier: Merck

Several reference materials for use in testing instruments are described in the European pharmacopoeias (e.g. Ph Eur. 2.2.6). In this case, the substances trimethylpentane, toluene and methylnaphthalene are prescribed. This instrument test should be carried out prior to every analysis. The comprehensive product range includes standards suitable for practically every operating range; the range 1,3915 to 1,6160 (20 °C) is covered.

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Silver standard solution, 1000 mg/L Ag in dil. nitric acid (from AgNO₃) Certipur® standard for ICP, Supelco®

Supplier: Merck

Silver Standard, 1000 mg/L, Certipur®, Supelco®, Silver, Matrix: Nitric acid dil., Application: ICP standards

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Nitrofurazone-13C,15N2, analytical standard, VETRANAL™, Supelco®

Supplier: Merck

Organic Standard, Nitrofurazone-13C,15N2

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Gamithromycin, analytical standard, VETRANAL™, Supelco®

Supplier: Merck

Organic Standard, Gamithromycin

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Organic reference standard, 2-Ethylhexyl salicylate, analytical standard, Supelco®

Supplier: Merck

2-Ethylhexyl salicylate may be used as a reference standard for the determination of octyl salicylate as a UV filter authorized in sunscreens by high-performance liquid chromatography.