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Reference Materials for Wastewater Testing

NSI is a globally trusted brand for laboratory quality control standards and proficiency tests. Use of our Certified Reference Materials (CRMs) and Proficiency Tests (PT) Standards on a routine basis to monitor analytical performance will defensibly document data quality and support accreditation requirements. We are laser focused on developing, manufacturing, and delivering unique ISO-accredited certified reference materials (CRMs) that are not only stable but are also easy to implement into routine testing work streams.

Interested in our GGA Concentrate Snips™? To use, simply snip open the tube and pour contents directly into a 300mL BOD bottle. No measurements are required and no contamination is possible. Watch the video below for a full product demonstration!


Our Wastewater Standards Are Convenient & Easy-To-Use
Some unique wastewater product concepts include:

  • Pre-measured, single-use reference materials that prevent laboratory errors and re-work.
  • Ready-to-use CRMs requiring no preparatory steps to save time and effort.
  • Cocktailed, multi-parameter CRMs that can be used for numerous types of testing procedures. Thus, reducing the number of CRMs needed in the typical laboratory.

Brochures and Flyers

Certified Reference Materials for Wastewater Labs


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SKU: MXSTD-SETAN

Assurance® Calibration Standards without Mercury for AA & ICP (125 mL)

  • CCL
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  • Brand Spex
  • Matrix Multiple
  • Concentration 5 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: MXSTD4A-500N

Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (500 mL)

  • CCL
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  • Brand Spex
  • Matrix 5% HNO3/tr. HF
  • Concentration 40 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: MXSTD4A-100N

Assurance® Mixed Calibration Standard 4A without Mercury for AA & ICP (125 mL)

  • CCL
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  • Brand Spex
  • Matrix 5% HNO3/tr. HF
  • Concentration 40 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
SKU: MM-9102

Matrix Modifier for GFAAS in 10% HNO3 + Tr HCl 750 µg Pd/mL - 500 Mg(NO3)2/mL

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  • Brand HPS
  • Matrix 10% HNO3 + Tr HCl
  • Concentration 750 µg Pd/mL - 500 Mg(NO3)2/mL
  • Certification Single: Gravimetric w/ICP Confirmation
SKU: MM-9040

Matrix Modifier for GFAAS in H2O 0.1% NH4NO3

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  • Brand HPS
  • Matrix H2O
  • Certification Single: Gravimetric w/ICP Confirmation
SKU: MM-9020

Matrix Modifier for GFAAS in 10% HNO3 + Tr HCl 0.1% Pd

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  • Brand HPS
  • Matrix 10% HNO3 + Tr HCl
  • Certification Single: Gravimetric w/ICP Confirmation
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