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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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721 Items found

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EPA Inorganics NPW Set EPA Inorganics NPW Set
SKU: QCI-035K

EPA Inorganics NPW Set

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Wastewater pH - Blind Wastewater pH - Blind
SKU: QCI-035B

Wastewater pH - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Wastewater pH CRM Wastewater pH CRM
SKU: QCI-035

Wastewater pH CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Trace Metals Concentrate - Blind Trace Metals Concentrate - Blind
SKU: QCI-034B

Trace Metals Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
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Trace Metals QC Concentrate CRM Trace Metals QC Concentrate CRM
SKU: QCI-034

Trace Metals QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
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Total Residual Chlorine Concentrate - Blind Total Residual Chlorine Concentrate - Blind
SKU: QCI-033B

Total Residual Chlorine Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Total Residual Chlorine QC Concentrate CRM Total Residual Chlorine QC Concentrate CRM
SKU: QCI-033

Total Residual Chlorine QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Total Phenolics Concentrate - Blind Total Phenolics Concentrate - Blind
SKU: QCI-032B

Total Phenolics Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Total Phenolics QC Concentrate CRM Total Phenolics QC Concentrate CRM
SKU: QCI-032

Total Phenolics QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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Amenable and Total Cyanide Concentrate - Blind Amenable and Total Cyanide Concentrate - Blind
SKU: QCI-031B

Amenable and Total Cyanide Concentrate - Blind

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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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Amenable and Total Cyanide QC Concentrate Amenable and Total Cyanide QC Concentrate
SKU: QCI-031

Amenable and Total Cyanide QC Concentrate

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  • Brand NSI
  • Certification Single: Grav. w/Analytical Confirmation
  • Concentration 0.1 - 1 mg/L
  • Raw Material >95% min; as available
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Oil & Grease Concentrate - Blind Oil & Grease Concentrate - Blind
SKU: QCI-029B

Oil & Grease Concentrate - Blind

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