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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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NPW - Nitroaromatics/Nitramines in Water NPW - Nitroaromatics/Nitramines in Water
SKU: QCO-136

NPW - Nitroaromatics/Nitramines in Water

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  • Brand NSI
  • Matrix Acetonitrile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Low Level PAHs - Blind NPW - Low Level PAHs - Blind
SKU: QCO-135B

NPW - Low Level PAHs - Blind

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  • Brand NSI
  • Matrix Acetonitile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Low Level PAHs NPW - Low Level PAHs
SKU: QCO-135

NPW - Low Level PAHs

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  • Brand NSI
  • Matrix Acetonitrile
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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WS - Chlorinated Acid Herbicides - Blind WS - Chlorinated Acid Herbicides - Blind
SKU: QCO-123B

WS - Chlorinated Acid Herbicides - Blind

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  • Brand NSI
  • Matrix MTBE
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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WS - Chlorinated Acid Herbicides WS - Chlorinated Acid Herbicides
SKU: QCO-123

WS - Chlorinated Acid Herbicides

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Organochlorine Pesticides - Blind NPW - Organochlorine Pesticides - Blind
SKU: QCO-122B

NPW - Organochlorine Pesticides - Blind

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  • Brand NSI
  • Matrix Ethyl acetate
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Organochlorine Pesticides NPW - Organochlorine Pesticides
SKU: QCO-122

NPW - Organochlorine Pesticides

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Base/Neutrals - Blind NPW - Base/Neutrals - Blind
SKU: QCO-121B

NPW - Base/Neutrals - Blind

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  • Brand NSI
  • Matrix Acetone/Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Base/Neutrals NPW - Base/Neutrals
SKU: QCO-121

NPW - Base/Neutrals

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Volatiles - Blind NPW - Volatiles - Blind
SKU: QCO-120B

NPW - Volatiles - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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NPW - Volatiles NPW - Volatiles
SKU: QCO-120

NPW - Volatiles

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  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Matrix Methanol
  • Raw Material >95% min; as available
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NPW - Supplemental Volatiles - Blind NPW - Supplemental Volatiles - Blind
SKU: QCO-119B

NPW - Supplemental Volatiles - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
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