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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: C-301

BTEX Mix

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-194

Pesticides Surrogates

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-191

Acids Matrix Spike

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-190

Base/Neutrals Matrix Spike

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  • Brand NSI
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-162L

CLP Base/Neutrals Surrogate Mix (1000ppm)

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  • Brand NSI
  • Concentration 1000ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-162H

CLP Base/Neutrals Surrogate Mix (5000ppm)

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  • Brand NSI
  • Concentration 5000ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-161L

CLP Acids Surrogate Mix Low (1500ppm)

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  • Brand NSI
  • Concentration 1500ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-161H

CLP Acids Surrogate Mix (7500ppm)

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  • Brand NSI
  • Concentration 7500ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-157

Method 8260 Internal Standards (2500ppm)

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  • Brand NSI
  • Concentration 2500ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-156

TCLP Herbicides Mix

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-143

TCLP Pesticides Mix

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
SKU: C-131M

8270 Acid Surrogate Mix (4000ppm)

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  • Brand NSI
  • Concentration 4000ppm
  • Raw Material >95% min
  • Certification Grav &/ Volumetric w/analytical confirmation
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