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.

Sort By

« ‹ 433 434 435 › »

VOAS in Soil - Low Level - PT, Proficiency Testing Material, Supelco®

Supplier: Merck

VOAS in Soil - Low Level - PT, Supelco®, Proficiency Testing Material, : N/A

Expand 1 Items

PAH Mix 3, certified reference material, Supelco®

Supplier: Merck

PAH Mix 3, Supelco®, Certified reference material, in methylene chloride: methanol (1:1) (varied), : N/A

Expand 1 Items

Pesticides 1 - WP, proficiency testing material, Supelco®

Supplier: Merck

Pesticides 1 - WP, Supelco®, Proficiency Testing Material, 1 mL for dilution up to 1L, : N/A

Expand 1 Items

Nutrients in soil - PT, proficiency testing material, Supelco®

Supplier: Merck

Nutrients in Soil - PT, Supelco®, Proficiency Testing Material, : N/A

Expand 1 Items

Trace Metals 3 - WS, Proficiency Testing Material, Supelco®

Supplier: Merck

Trace Metals 3 - WS, Supelco®, Proficiency Testing Material, : N/A

Expand 1 Items

PAHs (low level) - WP, proficiency testing material, Supelco®

Supplier: Merck

PAHs (Low Level) - WP, Supelco®, Proficiency Testing Material, Concentrate for dilution to 1L, : N/A

Expand 1 Items

Corrosivity/Sodium - whole volume, (CRM), Supelco®

Supplier: Merck

Corrosivity/Sodium - Whole Volume, Supelco®, Certified reference material, : N/A

Expand 1 Items

Trace metals - sewage sludges, (CRM), Supelco®

Supplier: Merck

Trace Metals - Sewage Sludge 3, Supelco®, : N/A, Pkg of 40 g (dry)

Expand 1 Items

BTEX - Loamy sand 1, (CRM), Supelco®

Supplier: Merck

BTEX - Loamy Sand 1, Supelco®, Certified reference material, : N/A, Pkg of 30 g

Expand 1 Items

Lithium ore, spodumene - lithium oxide, NIST standards

Supplier: PROMOCHEM

This reference standards are intended to use in checking the accuracy of assay methods. These are supplied in fine powder form.

Expand 1 Items

Trace metals - baghouse dust, (CRM), Supelco®

Supplier: Merck

Trace Metals - Baghouse Dust, Supelco®, Certified reference material, : N/A, Pkg of 50 g

Expand 1 Items

Simple nutrients in seawater - Whole volume, (CRM), Supelco®

Supplier: Merck

Simple Nutrients in Seawater - Whole Volume, Supelco®, Certified reference material, : N/A

Expand 1 Items

ASTM® D2887/D5307 column resolution Test Mix, certified reference material, Supelco®

Supplier: Merck

ASTM(R) D2887/D5307 Column Resolution Test Mix, Supelco®, 1 % (w/v) each component in octane

Expand 1 Items

EPA 8270 Organophosphorus pesticides mix, certified reference material, Supelco®

Supplier: Merck

EPA 8270 Organophosphorus Pesticides Mix, Supelco®, Certified reference material, 2000 mug/mL each component in hexane: acetone (80:20), : N/A

Expand 1 Items

Loss on drying PT, proficiency testing material, Supelco®

Supplier: Merck

Loss on Drying PT, Proficiency Testing Material

Expand 1 Items

EPA 552 halogenated acetic acids mix, certified reference material, Supelco®

Supplier: Merck

EPA 552 Halogenated Acetic Acids Mix, Supelco®, Certified reference material, 2000 mug/mL each component in methyl tert-butyl ether, : N/A

Expand 1 Items

Residual Solvents Class 1 PT, Proficiency Testing Material, Supelco®

Supplier: Merck

Residual Solvents Class 1 PT, Proficiency Testing Material

Expand 1 Items

Ferromanganese, high carbon, alloy, NIST-68C, reference standard

Supplier: PROMOCHEM

This standard reference material is in the powder form intended for use in checking chemical methods of analysis and in calibration with instrumental methods of analysis.

Expand 1 Items

Supelco® Colour Reference Solutions, set of colours Y, ampoules of 2 ml, Merck

Supplier: Merck

The kit contains a set of seven yellow colour reference standards (identified sequentially from Y1 to Y7) and a 1% hydrogen chloride solution in water. The solutions are produced from two primary metal salt solutions of ferric(III) chloride and cobalt(II) chloride, in accordance with chapter 2.2.2 ′Degree of colouration of liquids′ of the European Pharmacopoeia (Ph. Eur.).

Expand 1 Items

Supelco® Colour Reference Solutions, set of colours B, ampoules of 2 ml, Merck

Supplier: Merck

The kit contains a set of nine brown colour reference standards (identified sequentially from B1 to B9) and a 1% hydrogen chloride solution in water. The solutions are produced from three primary metal salt solutions of ferric(III) chloride, cobalt(II) chloride, and copper(II) sulfate pentahydrate, in accordance with chapter 2.2.2 ′Degree of colouration of liquids′ of the European Pharmacopoeia (Ph. Eur.).

Expand 1 Items

Supelco® Colour Reference Solutions, set of colours B, BY, Y, GY, R, ampoules of 10 ml, Merck

Supplier: Merck

The kit contains set of brown(92936), yellow (83967), red (95872), greenish-yellow (90269), and brownish-yellow (72666) colour reference standards. The solutions are produced from three primary metal salt solutions of ferric(III) chloride, cobalt(II) chloride, and copper(II) sulfate pentahydrate, in accordance with chapter 2.2.2 ′Degree of colouration of liquids′ of the European Pharmacopoeia (Ph. Eur.).