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Scheduled Proficiency Testing & PT Express™ for Environmental Testing

  • Certified for environmental methods — plate counts, MPN
  • COA includes expected values for multiple methods
  • Robust — lyophilized technique ensures strong recovery, even for 44.5 ºC coliform methods
  • Unique — multi-organism CRM covers six methods in a single pellet

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DMRQA

The Discharge Monitoring Report-Quality Assurance Study Program (DMRQA) plays a critical role in monitoring compliance with environmental regulations, ensuring the accuracy of data, identifying trends and patterns, and promoting transparency and accountability in environmental management.

Drinking Water Standards

NSI offers a wide range of Certified Reference Materials (CRMs) for drinking water analysis to ensure environmental and human health. Offerings include testing standards for pH, residual free chlorine, turbidity, trace metals, mercury, fluoride, and nitrite.

Legionella

Legionella certified reference materials are crucial for ensuring the accuracy and reliability of testing methods used to detect the presence of Legionella bacteria in water systems.

Soil/UST Standards

Soil and Underground Storage Tank (UST) standards are fundamental regulations established to preserve the environment and human health from hazards associated with underground storage tanks.

Wastewater Standards

Wastewater analysis is a powerful public and environmental health tool. We are laser-focused on manufacturing and delivering unique ISO-accredited Certified Reference Materials (CRMs) that are not only stable but also easy to use and implement.

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Simple Nutrients Concentrate - Blind Simple Nutrients Concentrate - Blind
SKU: QCI-138B

Simple Nutrients Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients QC Concentrate CRM Simple Nutrients QC Concentrate CRM
SKU: QCI-138

Simple Nutrients QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Hardness - Blind Hardness - Blind
SKU: QCI-137B

Hardness - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Hardness QC CRM Hardness QC CRM
SKU: QCI-137

Hardness QC CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Minerals - Blind Minerals - Blind
SKU: QCI-136B

Minerals - Blind

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Minerals QC CRM Minerals QC CRM
SKU: QCI-136

Minerals QC CRM

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Wastewater Bromide Concentrate - Blind Wastewater Bromide Concentrate - Blind
SKU: QCI-134B

Wastewater Bromide Concentrate - Blind

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  • Brand NSI
  • Concentration 1.0 - 10 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Wastewater Color - Blind Wastewater Color - Blind
SKU: QCI-130B

Wastewater Color - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SGT - HEM (TPH) Concentrate - Blind SGT - HEM (TPH) Concentrate - Blind
SKU: QCI-129B

SGT - HEM (TPH) Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Volatile Solids - Blind Volatile Solids - Blind
SKU: QCI-127B

Volatile Solids - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
Settleable Solids - Blind Settleable Solids - Blind
SKU: QCI-126B

Settleable Solids - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
Settleable Solids QC CRM Settleable Solids QC CRM
SKU: QCI-126

Settleable Solids QC CRM

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