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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: 522L

2,4,5-TP (Silvex)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 515

PETN

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 1191WL

Herbicide Surrogate

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 114H

Pronamide

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 51720

Dacthal (DCPA dimethyl ester)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 1145

1-Chloro-3-nitrobenzene

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: 1024

p-Terphenyl

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: C-194WL

Pesticide Surrogates

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: THM-LM4C-A1

4 Component Trihalomethanes Mix, 200 µg/mL

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  • Brand HPS
  • Matrix Methanol-P&T
  • Concentration 200 µg/mL
  • Certification Single: Gravimetric
SKU: THM-HM4C-A1

4 Component Trihalomethanes Mix, 2,000 µg/mL

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  • Brand HPS
  • Matrix Methanol-P&T
  • Concentration 2,000 μg/mL
  • Certification Single: Gravimetric
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