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Drinking water is susceptible to numerous harmful contaminants, prompting the EPA to establish rigorous regulations for over 90 pollutants, encompassing microorganisms, inorganic chemicals, organic chemicals, disinfectants, and disinfection by-products. We provide an extensive range of certified reference materials (CRMs) tailored for comprehensive drinking water analysis. Our offerings include specific drinking water pH standards, as well as testing standards for residual free chlorine, turbidity, trace metals, mercury, fluoride, and nitrite. Our drinking water standards are essential for maintaining water quality, safeguarding public health, and supporting accurate and reliable laboratory analysis.

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SKU: IS-004

NO2 CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
SKU: IS-003

NH3 CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SKU: IS-002

N-NH3 CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SKU: IS-001H

COD CRM (500 mL)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SKU: IS-001

COD CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
  • Top rated
  • KIT
SKU: INTER-SETN

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

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  • Brand Spex
  • Matrix Multiple
  • Concentration 6,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
  • KIT
SKU: INTER-SET

Assurance® Interference Check Standards with Mercury for AA & ICP (125 mL)

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  • Brand Spex
  • Matrix Multiple
  • Concentration 6,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: INTER5-500

Assurance® Interference Check Standard 5 for AA & ICP (500 mL)

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  • Brand Spex
  • Matrix 5% HNO3
  • Concentration 6,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: INTER5-100

Assurance® Interference Check Standard 5 for AA & ICP (125 mL)

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  • Brand Spex
  • Matrix 5% HNO3
  • Concentration 6,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: INTER18-500N

Assurance® Interference Check Standard 18 without Mercury for AA & ICP (500 mL)

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  • Brand Spex
  • Matrix 5% HNO3
  • Concentration 20,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
  • KIT
SKU: INTER18-500

Assurance® Interference Check Standard 18 with Mercury for AA & ICP (500 mL)

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  • Brand Spex
  • Matrix 5% HNO3
  • Concentration 20,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
  • Top rated
SKU: INTER18-100N

Assurance® Interference Check Standard 18 without Mercury for AA & ICP (125 mL)

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  • Brand Spex
  • Matrix 5% HNO3
  • Concentration 20,000 µg/mL
  • Raw Material Five 9s & Purification as available
  • Certification Single: Direct ICP Analysis
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