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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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Trace Level Mercury Concentrate - Blind Trace Level Mercury Concentrate - Blind
SKU: QCO-137B

Trace Level Mercury Concentrate - Blind

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  • Brand NSI
  • Matrix Nitric acid
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Trace Level Mercury QC Concentrate CRM Trace Level Mercury QC Concentrate CRM
SKU: QCO-137

Trace Level Mercury QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
NPW - Nitroaromatics/Nitramines in Water - Blind NPW - Nitroaromatics/Nitramines in Water - Blind
SKU: QCO-136B

NPW - Nitroaromatics/Nitramines in Water - Blind

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  • Brand NSI
  • Matrix Water
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Nitroaromatics/Nitramines in Water NPW - Nitroaromatics/Nitramines in Water
SKU: QCO-136

NPW - Nitroaromatics/Nitramines in Water

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  • Brand NSI
  • Matrix Acetonitrile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Low Level PAHs - Blind NPW - Low Level PAHs - Blind
SKU: QCO-135B

NPW - Low Level PAHs - Blind

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  • Brand NSI
  • Matrix Acetonitile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Low Level PAHs NPW - Low Level PAHs
SKU: QCO-135

NPW - Low Level PAHs

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  • Brand NSI
  • Matrix Acetonitrile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Organochlorine Pesticides - Blind NPW - Organochlorine Pesticides - Blind
SKU: QCO-122B

NPW - Organochlorine Pesticides - Blind

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  • Brand NSI
  • Matrix Ethyl acetate
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Organochlorine Pesticides NPW - Organochlorine Pesticides
SKU: QCO-122

NPW - Organochlorine Pesticides

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Base/Neutrals - Blind NPW - Base/Neutrals - Blind
SKU: QCO-121B

NPW - Base/Neutrals - Blind

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  • Brand NSI
  • Matrix Acetone/Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Base/Neutrals NPW - Base/Neutrals
SKU: QCO-121

NPW - Base/Neutrals

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Volatiles - Blind NPW - Volatiles - Blind
SKU: QCO-120B

NPW - Volatiles - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Volatiles NPW - Volatiles
SKU: QCO-120

NPW - Volatiles

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  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Matrix Methanol
  • Raw Material >95% min; as available
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