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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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EPA Inorganics NPW Set EPA Inorganics NPW Set
SKU: PEI-037K

EPA Inorganics NPW Set

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  • Brand NSI
  • Raw Material >95% min
  • Certification Single: Grav. w/Analytical Confirmation
Full NELAC Inorganics Set Full NELAC Inorganics Set
SKU: PEI-035K

Full NELAC Inorganics Set

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  • Brand NSI
  • Raw Material >95% min
  • Certification Single: Grav. w/Analytical Confirmation
pH (2 pack) pH (2 pack)
SKU: PEI-035

pH (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Trace Metals (2 pack) Trace Metals (2 pack)
SKU: PEI-034

Trace Metals (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Total Residual Chlorine (2 pack) Total Residual Chlorine (2 pack)
SKU: PEI-033

Total Residual Chlorine (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Total Phenolics (2 pack) Total Phenolics (2 pack)
SKU: PEI-032

Total Phenolics (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Amenable and Total Cyanide (2 pack) Amenable and Total Cyanide (2 pack)
SKU: PEI-031

Amenable and Total Cyanide (2 pack)

  • CCL
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  • Brand NSI
  • Concentration 0.1 - 1 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Oil and Grease (2 pack) Oil and Grease (2 pack)
SKU: PEI-029

Oil and Grease (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Demand (2 pack) Demand (2 pack)
SKU: PEI-026

Demand (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
7 Component Dutch 7 PCB Congeners Mix, 1 mL 7 Component Dutch 7 PCB Congeners Mix, 1 mL
SKU: PCB-MD7C-A1

7 Component Dutch 7 PCB Congeners Mix, 1 mL

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  • Brand HPS
  • Matrix Isooctane
  • Concentration 100 µg/mL
  • Certification Single: Gravimetric
  • Top rated
Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (500 mL) Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (500 mL)
SKU: MXSTD4A-500N

Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (500 mL)

  • CCL
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  • Brand Spex
  • Matrix 5% HNO3/tr. HF
  • Concentration 40 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (125 mL) Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (125 mL)
SKU: MXSTD4A-100N

Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (125 mL)

  • CCL
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  • Brand Spex
  • Matrix 5% HNO3/tr. HF
  • Concentration 40 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
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