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Explore the broadest selection of analytical reference materials and proficiency testing (PT) from the leading brands in certified and analytical reference materials: Spex, NSI, HPS, and Chiron.

Our harmonized product development and custom capabilities are tailored to bring you innovative products to help meet your unique application needs.

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6,011 Items found

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SKU: UST-480

TX-1005 Calibration Standard

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-470

Diesel Fuel No. 2

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-460

GRO Gasoline Comp. Std (TN/MS)

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-450H

EPH by GC/FID (TN)

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-430H

MA EPH Spike Mix

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-420

MA EPH Aliphatics

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-410

CA WIP VOA Standard

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-400

PVOC Mixture (CA)

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-380

DRO Mix (TN/MS)

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-370

WI DRO Mixture

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-360

WI PVOC/GRO Standard

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
SKU: UST-310

MA VPH Standard

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  • Brand NSI
  • Certification Gravimetric and/or Volumetric
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