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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: ECS-N-201

Semivolatile Internal Standards Mix, 2,000 µg/mL

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  • Brand Spex
  • Certification Single: Grav. &/or Volume w/Analytical Confirm
  • Concentration 2,000 μg/mL
  • Matrix Methylene Chloride
  • Raw Material >95% min; as available
  • Top rated
SKU: ECS-N-001

Semivolatile Internal Standards Mix, 4,000 µg/mL

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  • Brand Spex
  • Matrix Methylene Chloride
  • Concentration 4,000 μg/mL
  • Raw Material >95% min; as available
  • Certification Single: Grav. &/or Volume w/Analytical Confirm
SKU: CWW-TOC-G

Total Organic Carbon at 100 µg/mL in H2O (5 mL)

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  • Brand HPS
  • Matrix H2O
  • Concentration 100 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-TOC-E

Total Organic Carbon at 40 µg/mL in H2O (5 mL)

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  • Brand HPS
  • Matrix H2O
  • Concentration 40 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-TOC-D

Total Organic Carbon at 30 µg/mL in H2O (5 mL)

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  • Brand HPS
  • Matrix H2O
  • Concentration 30 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-TOC-C

Total Organic Carbon at 20 µg/mL in H2O (5 mL)

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  • Brand HPS
  • Matrix H2O
  • Concentration 20 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-TOC-B

Total Organic Carbon at 10 µg/mL in H2O (5 mL)

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  • Brand HPS
  • Matrix H2O
  • Concentration 10 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-CN-F

Cyanide Solution at 0.7 µg/mL Total Cyanide in 0.5% KOH (10 mL)

  • CCL
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  • Brand HPS
  • Matrix 0.5% KOH
  • Concentration 0.35 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-CN-D

Cyanide Solution at 0.04 µg/mL Total Cyanide in 0.5% KOH (10 mL)

  • CCL
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  • Brand HPS
  • Matrix 0.5% KOH
  • Concentration 0.02 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-CN-C

Cyanide Solution at 1.0 µg/mL Total Cyanide in 0.5% KOH (10 mL)

  • CCL
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  • Brand HPS
  • Matrix 0.5% KOH
  • Concentration 0.5 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
SKU: CWW-CN-B

Cyanide Solution at 0.2 µg/mL Total Cyanide in 0.5% KOH (10 mL)

  • CCL
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  • Brand HPS
  • Matrix 0.5% KOH
  • Concentration 0.1 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/IC Confirmation
  • Top rated
SKU: CS-NH49-2Y

Ammonium (NH4+) Single-Element Ion Cation Standard, 1,000 µg/mL (1,000 ppm) (125 mL)

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  • Brand Spex
  • Matrix H2O
  • Concentration 1,000 µg/mL
  • Measured Impurities 68 elements to ppm (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
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