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Environmental Certified Reference Materials and Proficiency Test Standards

Our wastewater standards enhance your testing accuracy and efficiency. Regular use of our certified reference materials (CRMs) and proficiency test (PT) standards ensures high data quality and supports accreditation needs.

We specialize in ISO-accredited CRMs and effluent standards that are stable and integrate seamlessly into routine workflows. Pre-measured, single-use materials help prevent errors and simplify processes. For example, try our GGA Concentrate Snips™: just snip and pour into a 300 mL BOD bottle—no measurements or contamination. Our versatile, multiparameter CRMs streamline testing procedures, reducing the need for multiple CRMs in your lab. Watch the demonstration video to learn more!

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Demand - Ready To Use Reference Material Demand - Ready To Use Reference Material
SKU: QCI-062

Demand - Ready To Use Reference Material

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Low-Level Solids CRM Low-Level Solids CRM
SKU: QCI-057

Low-Level Solids CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Mid-Level Solids Concentrate Reference Material Mid-Level Solids Concentrate Reference Material
SKU: QCI-055X

Mid-Level Solids Concentrate Reference Material

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
High-Level Solids CRM High-Level Solids CRM
SKU: QCI-055H

High-Level Solids CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Mid-Level Solids CRM Mid-Level Solids CRM
SKU: QCI-055

Mid-Level Solids CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
LAS (MBAs, Anionic Surfactant) LAS (MBAs, Anionic Surfactant)
SKU: QCI-054

LAS (MBAs, Anionic Surfactant)

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  • Brand NSI
  • Concentration 1000 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Full NELAC Inorganics Set Full NELAC Inorganics Set
SKU: QCI-036K

Full NELAC Inorganics Set

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
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
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
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
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
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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