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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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BTEX by PID Wastewater PT Standard (2 pack) BTEX by PID Wastewater PT Standard (2 pack)
SKU: PEO-150

BTEX by PID Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
Trace Level Mercury (2 pack) Trace Level Mercury (2 pack)
SKU: PEO-137

Trace Level Mercury (2 pack)

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  • Brand NSI
  • Matrix Nitric acid
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Nitroaromatics/Nitramines in Water Wastewater PT Standard (2 pack) Nitroaromatics/Nitramines in Water Wastewater PT Standard (2 pack)
SKU: PEO-136

Nitroaromatics/Nitramines in Water Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Water
  • Certification Single: Grav. w/Analytical Confirmation
Low Level PAHs Wastewater PT Standard (2 pack) Low Level PAHs Wastewater PT Standard (2 pack)
SKU: PEO-135

Low Level PAHs Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Acetonitile
  • Certification Single: Grav. w/Analytical Confirmation
Organochlorine Pesticides Wastewater PT Standard (2 pack) Organochlorine Pesticides Wastewater PT Standard (2 pack)
SKU: PEO-122

Organochlorine Pesticides Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Ethyl acetate
  • Certification Single: Grav. w/Analytical Confirmation
Base/Neutrals Wastewater PT Standard (2 pack) Base/Neutrals Wastewater PT Standard (2 pack)
SKU: PEO-121

Base/Neutrals Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Acetone/Methanol soution
  • Certification Single: Grav. w/Analytical Confirmation
Volatiles Wastewater PT Standard (2 pack) Volatiles Wastewater PT Standard (2 pack)
SKU: PEO-120

Volatiles Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
Supplemental Volatiles Wastewater PT Standard (2 pack) Supplemental Volatiles Wastewater PT Standard (2 pack)
SKU: PEO-119

Supplemental Volatiles Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
NPW - Alcohols in Water NPW - Alcohols in Water
SKU: PEO-104

NPW - Alcohols in Water

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  • Brand NSI
  • Matrix Water
  • Certification Single: Grav. w/Analytical Confirmation
Low Level Halocarbons Wastewater PT Standard (2 pack) Low Level Halocarbons Wastewater PT Standard (2 pack)
SKU: PEO-103

Low Level Halocarbons Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
Gasoline Range Organics (GRO) Wastewater PT Standard (2 pack) Gasoline Range Organics (GRO) Wastewater PT Standard (2 pack)
SKU: PEO-102

Gasoline Range Organics (GRO) Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
Diesel Range Organics (DRO) Wastewater PT Standard (2 pack) Diesel Range Organics (DRO) Wastewater PT Standard (2 pack)
SKU: PEO-101

Diesel Range Organics (DRO) Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol solution
  • Certification Single: Grav. w/Analytical Confirmation
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