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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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SKU: PEO-022

Acids Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Acetone
  • Certification Single: Grav. w/Analytical Confirmation
SKU: PEO-020

PCB in Water Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Acetone
  • Certification Single: Grav. w/Analytical Confirmation
SKU: PEI-199

FOGs by IR Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: PEI-198

Salinity Wastewater PT Standard (2 pack)

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

Hardness (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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
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