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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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NPW -Gasoline Range Organics (GRO) - Blind NPW -Gasoline Range Organics (GRO) - Blind
SKU: QCO-102B

NPW -Gasoline Range Organics (GRO) - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW -Gasoline Range Organics (GRO) NPW -Gasoline Range Organics (GRO)
SKU: QCO-102

NPW -Gasoline Range Organics (GRO)

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Diesel Range Organics (DRO) - Blind NPW - Diesel Range Organics (DRO) - Blind
SKU: QCO-101B

NPW - Diesel Range Organics (DRO) - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Diesel Range Organics (DRO) NPW - Diesel Range Organics (DRO)
SKU: QCO-101

NPW - Diesel Range Organics (DRO)

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - OP Pesticides - Blind NPW - OP Pesticides - Blind
SKU: QCO-100B

NPW - OP Pesticides - Blind

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  • Brand NSI
  • Matrix Acetone
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - OP Pesticides NPW - OP Pesticides
SKU: QCO-100

NPW - OP Pesticides

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Herbicides - Blind NPW - Herbicides - Blind
SKU: QCO-094B

NPW - Herbicides - Blind

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  • Brand NSI
  • Matrix Methyl tert-butyl ether
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Herbicides NPW - Herbicides
SKU: QCO-094

NPW - Herbicides

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Toxaphene - Blind NPW - Toxaphene - Blind
SKU: QCO-093B

NPW - Toxaphene - Blind

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  • Brand NSI
  • Matrix Acetone
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - Toxaphene NPW - Toxaphene
SKU: QCO-093

NPW - Toxaphene

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - PCBs in Oil - Blind NPW - PCBs in Oil - Blind
SKU: QCO-072B

NPW - PCBs in Oil - Blind

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  • Brand NSI
  • Matrix Hemp Oil
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - PCBs in Oil NPW - PCBs in Oil
SKU: QCO-072

NPW - PCBs in Oil

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