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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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SKU: 1296-M

Dalapon ME

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1296-H

Dalapon ME

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1294-M

2,4-Dichlorophenoxyacetic acidME

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1293-M

Dicamba ME

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1291L

DCAA methyl ester

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1288-M

1-Methylnaphthalene

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1287-M

Thionazin (Zinophos)

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1287-HA

Thionazin (Zinophos)

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 126M

Arochlor 1221 1000ppm in Methanol

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  • Brand NSI
  • Matrix Methanol
  • Concentration 1000ug/mL
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 126L-T

Arochlor 1221 50ppm in Oil

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  • Brand NSI
  • Matrix Hemp Oil
  • Concentration 50ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 126L

Arochlor 1221 50ppm in Hexane

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  • Brand NSI
  • Matrix Hexane
  • Concentration 50ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 126H-T

Arochlor 1221 500ppm in Oil

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  • Brand NSI
  • Matrix Hemp Oil
  • Concentration 500ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
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