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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: 573

Kepone

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  • Brand NSI
  • Matrix Cyclohexane
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 572

Parathion methyl

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  • Brand NSI
  • Matrix Hexane
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 568

2,2'-Difluorobiphenyl

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  • Brand NSI
  • Matrix CH2Cl2
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 567

7,12-Dimethylbenz(a)anthracene

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  • Brand NSI
  • Matrix CH2Cl2
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 562

2-Methylnaphthalene

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  • Brand NSI
  • Matrix CH2Cl2
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 551

Ethylene glycol

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  • Brand NSI
  • Matrix MeOH
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 536

Vinyl chloride

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 527

1,3-Dinitrobenzene

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 520

cis-1,3-Dichloropropylene

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  • Brand NSI
  • Matrix PT Methanol
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 498

2,3,4,6-Tetrachlorophenol

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  • Brand NSI
  • Matrix CH2Cl2
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 493

1,1,2-Trichlorotrifluoroethane

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  • Brand NSI
  • Matrix PT Methanol
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 485

N-Nitrosomorpholine

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
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