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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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2,576 Items found

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SKU: C-623

Organophosphorus Pesticides Mix 1

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-617

8081A Organochlorine Pesticide

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-610H

Acrolein/Acrylonitrile Mix, 20,000ppm in Water

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  • Brand NSI
  • Matrix Water
  • Concentration 20,000 ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-610

Acrolein/Acrylonitrile Mix, 2000ppm in Water

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  • Brand NSI
  • Matrix Water
  • Concentration 2000ppm
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-603

8270 6 Component Surrogate CRM

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-601

BNA Additionals Mix

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-523

8270 Calibration Mix 5 - 2000ppm each

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  • Brand NSI
  • Concentration 2000ppm
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-522

8270 Calibration Mix 4 - 2000ppm each

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  • Brand NSI
  • Concentration 2000ppm
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-521

8270 Calibration Mix 3 - 23 Components at 2000ppm each

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  • Brand NSI
  • Concentration 2000ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-520

8270 Calibration Mix 2 - 2000ppm each

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  • Brand NSI
  • Concentration 2000ppm
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-519

8270 Calibration Mix 1 - 2000ppm each

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  • Brand NSI
  • Concentration 2000ppm
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-496

8082 Arochlor Mix(1016/1260) 1000ppm each

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  • Brand NSI
  • Concentration 1000ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
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