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Proficiency Testing

We offer Proficiency Testing products for a variety of testing schemes for both quantitative and qualitative test performance.
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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
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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
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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
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SKU: PEI-026

Demand (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
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SKU: PEI-020K

EPA WS Inorganics Kit

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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SKU: PEI-018K

Full NELAC WS Inorganics Kit

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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SKU: PEI-017

Inorganic Disinfection By-Products Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
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SKU: PEI-016

Trace Metals Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
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SKU: PEI-015

Cyanide Drinking Water Inorganic Standard

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  • Brand NSI
  • Concentration 0.1 - 0.5 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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SKU: PEI-014

Turbidity Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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SKU: PEI-013

TOC/DOC Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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SKU: PEI-012

Residual Free Chlorine Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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