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Environmental Certified Reference Materials and Proficiency Test Standards

Our wastewater standards enhance your testing accuracy and efficiency. Regular use of our certified reference materials (CRMs) and proficiency test (PT) standards ensures high data quality and supports accreditation needs.

We specialize in ISO-accredited CRMs and effluent standards that are stable and integrate seamlessly into routine workflows. Pre-measured, single-use materials help prevent errors and simplify processes. For example, try our GGA Concentrate Snips™: just snip and pour into a 300 mL BOD bottle—no measurements or contamination. Our versatile, multiparameter CRMs streamline testing procedures, reducing the need for multiple CRMs in your lab. Watch the demonstration video to learn more!

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MBAs Wastewater PT Standard (2 pack) MBAs Wastewater PT Standard (2 pack)
SKU: PEI-124

MBAs Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Bromide Wastewater PT Standard (2 pack) Bromide Wastewater PT Standard (2 pack)
SKU: PEI-110

Bromide Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Concentration 1.0 - 10 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
TOX Wastewater PT Standard (2 pack) TOX Wastewater PT Standard (2 pack)
SKU: PEI-104

TOX Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Silica Wastewater PT Standard (2 pack) Silica Wastewater PT Standard (2 pack)
SKU: PEI-101

Silica Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Nitrite (2 pack) Nitrite (2 pack)
SKU: PEI-100

Nitrite (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Acidity Wastewater PT Standard (2 pack) Acidity Wastewater PT Standard (2 pack)
SKU: PEI-099

Acidity Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Low-Level Total Residual Chlorine (2 pack) Low-Level Total Residual Chlorine (2 pack)
SKU: PEI-096

Low-Level Total Residual Chlorine (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Hexavalent Chromium (2 pack) Hexavalent Chromium (2 pack)
SKU: PEI-095

Hexavalent Chromium (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Turbidity (2 pack) Turbidity (2 pack)
SKU: PEI-092

Turbidity (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Mercury (2 pack) Mercury (2 pack)
SKU: PEI-087

Mercury (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Sulfide Wastewater PT Standard (2 pack) Sulfide Wastewater PT Standard (2 pack)
SKU: PEI-086

Sulfide Wastewater PT Standard (2 pack)

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Residue (2 pack) Residue (2 pack)
SKU: PEI-079

Residue (2 pack)

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