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Scheduled Proficiency Testing & PT Express™ for Wastewater Testing

NSI is a globally trusted brand for laboratory quality control standards and proficiency tests. Routine use of our Certified Reference Materials (CRMs) and Proficiency Testing (PT) standards to monitor analytical performance will defensibly document data quality and support accreditation requirements.

We are laser-focused on developing, manufacturing, and delivering unique ISO-accredited CRMs that are not only stable but also easy to implement into routine testing workflows.

Interested in our GGA Concentrate Snips™? Simply snip open the tube and pour contents directly into a 300 mL BOD bottle. No measurements required, no contamination risk. Watch the demonstration video below to learn more!

Our Wastewater Standards Are Convenient & Easy-To-Use
Some unique wastewater product concepts include:

  • Pre-measured, single-use reference materials that prevent laboratory errors and rework
  • Ready-to-use CRMs requiring no preparatory steps, saving time and effort
  • Cocktailed, multi-parameter CRMs that reduce the number of CRMs needed in typical laboratory testing

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Dissolved Oxygen Wastewater PT Standard (2 pack) Dissolved Oxygen Wastewater PT Standard (2 pack)
SKU: PEI-192

Dissolved Oxygen Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
Ignitability Wastewater PT Standard, 110 mL bottle Ignitability Wastewater PT Standard, 110 mL bottle
SKU: PEI-191

Ignitability Wastewater PT Standard, 110 mL bottle

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
Uranium Wastewater PT Standard (2 pack) Uranium Wastewater PT Standard (2 pack)
SKU: PEI-180

Uranium Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Perchlorate Wastewater PT Standard (2 pack) Perchlorate Wastewater PT Standard (2 pack)
SKU: PEI-146

Perchlorate Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Complex Nutrients (2 pack) Complex Nutrients (2 pack)
SKU: PEI-139

Complex Nutrients (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients (2 pack) Simple Nutrients (2 pack)
SKU: PEI-138

Simple Nutrients (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Hardness (2 pack) Hardness (2 pack)
SKU: PEI-137

Hardness (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Minerals (2 pack) Minerals (2 pack)
SKU: PEI-136

Minerals (2 pack)

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Color Wastewater PT Standard (2 pack) Color Wastewater PT Standard (2 pack)
SKU: PEI-130

Color Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SGT - HEM (TPH) Wastewater PT Standard (2 pack) SGT - HEM (TPH) Wastewater PT Standard (2 pack)
SKU: PEI-129

SGT - HEM (TPH) Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Hexavalent Chromium Drinking Water Inorganic Standard Hexavalent Chromium Drinking Water Inorganic Standard
SKU: PEI-128

Hexavalent Chromium Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Volatile Solids Wastewater PT Standard (2 pack) Volatile Solids Wastewater PT Standard (2 pack)
SKU: PEI-127

Volatile Solids Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
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