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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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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
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
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
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
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
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
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
Oil & Grease QC Concentrate CRM Oil & Grease QC Concentrate CRM
SKU: QCI-029

Oil & Grease QC Concentrate CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Demand Concentrate - Blind Demand Concentrate - Blind
SKU: QCI-026B

Demand Concentrate - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Demand QC Concentrate Demand QC Concentrate
SKU: QCI-026

Demand QC Concentrate

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  • Brand NSI
  • Certification Single: Gravimetric w/IC Confirmation
  • Raw Material >95% min; as available
TPH in Water - Blind TPH in Water - Blind
SKU: QC-116B

TPH in Water - Blind

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  • Brand NSI
  • Matrix Water
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Diesel in Water - Blind Diesel in Water - Blind
SKU: QC-115B

Diesel in Water - Blind

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  • Brand NSI
  • Matrix Water
  • Certification Single: Gravimetric and/or Volumetric
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