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High-quality Inorganic Reference Materials 

We offer a full range of inorganic standards for IC, AA, ICP, and ICP-MS. The highly characterized standards in our Assurance and Claritas PPT lines are intended for ICP and ICP-MS trace analysis. We have built our reputation by providing chemists and environmental scientists products that exhibit quality, reliability, and convenience.

Inorganic Standards Can Be Used For:

  • Atomic Absorption (AA)
  • Inductively Coupled Plasma (ICP)
  • Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)
  • Ion Chromatography (IC)

Features of Spex Inorganic Standards:

  • Wide range of single & multi-element standards for Claritas PPT® and Assurance® grades
  • Multi-element standards designed for the latest EPA methods
  • Custom standards tailored to your application needs
  • Traceable to NIST SRM for confidence in results
  • High-purity acids: Assurance® (high purity) & Claritas PPT® (ultra high purity) formulations
  • Broad analytical range with detection levels at ppb (Assurance®) & ppb/ppt (Claritas PPT®), backed by a Certificate of Analysis
  • Dedicated team of scientists for expert guidance & support

Download Our Inorganic Standards Brochure

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Search Our Full Range of Inorganic Standards for IC, AA, ICP, and ICP-MS

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1,800 Items found

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  • Top rated
Claritas PPT® Grade Lead 206, 10 µg/mL (10 ppm) for ICP-MS (125 mL) Claritas PPT® Grade Lead 206, 10 µg/mL (10 ppm) for ICP-MS (125 mL)
SKU: ISOT-PB206

Claritas PPT® Grade Lead 206, 10 µg/mL (10 ppm) for ICP-MS (125 mL)

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  • Brand Spex
  • Matrix 2% HNO3
  • Concentration 10 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
  • Top rated
Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (30 mL) Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (30 mL)
SKU: ISOT-LI6M

Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (30 mL)

  • CCL
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  • Brand Spex
  • Matrix 2% HNO3
  • Concentration 100 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
  • Top rated
Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (125 mL) Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (125 mL)
SKU: ISOT-LI6

Lithium 6, 100 µg/mL (100 ppm) for ICP-MS (125 mL)

  • CCL
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  • Brand Spex
  • Matrix 2% HNO3
  • Concentration 100 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
  • Top rated
Claritas PPT® Copper 65, 10 µg/mL (10 ppm) for ICP-MS (125 mL) Claritas PPT® Copper 65, 10 µg/mL (10 ppm) for ICP-MS (125 mL)
SKU: ISOT-CU65

Claritas PPT® Copper 65, 10 µg/mL (10 ppm) for ICP-MS (125 mL)

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  • Brand Spex
  • Matrix 2% HNO3
  • Concentration 10 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
  • Top rated
Claritas PPT® Boron 11, 10 µg/mL (10 ppm) for ICP-MS (125 mL) Claritas PPT® Boron 11, 10 µg/mL (10 ppm) for ICP-MS (125 mL)
SKU: ISOT-B11

Claritas PPT® Boron 11, 10 µg/mL (10 ppm) for ICP-MS (125 mL)

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  • Brand Spex
  • Matrix H2O
  • Concentration 10 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
  • Top rated
Boron 10, 10 µg/mL (10 ppm) for ICP-MS (125 mL) Boron 10, 10 µg/mL (10 ppm) for ICP-MS (125 mL)
SKU: ISOT-B10

Boron 10, 10 µg/mL (10 ppm) for ICP-MS (125 mL)

  • CCL
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  • Brand Spex
  • Matrix H2O
  • Concentration 10 µg/mL
  • Measured Impurities 68 elements to ppb (product)
  • Raw Material Five 9s & Purification as available
  • Certification Dual: Wet Chem, ICP Direct & ICPMS Impurities
Calcium Hardness CRM  Calcium Hardness CRM
SKU: IS-034

Calcium Hardness CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Total Hardness CRM, 1000mg Total Hardness CRM, 1000mg
SKU: IS-017

Total Hardness CRM, 1000mg

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  • Brand NSI
  • Concentration 1000mg
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
  • Top rated
Assurance® Interference Check Standard 5 for AA & ICP (500 mL) Assurance® Interference Check Standard 5 for AA & ICP (500 mL)
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
Assurance® Interference Check Standard 5 for AA & ICP (125 mL) Assurance® Interference Check Standard 5 for AA & ICP (125 mL)
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
Assurance® Interference Check Standard 18 without Mercury for AA & ICP (500 mL) Assurance® Interference Check Standard 18 without Mercury for AA & ICP (500 mL)
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
Assurance® Interference Check Standard 18 with Mercury for AA & ICP (500 mL) Assurance® Interference Check Standard 18 with Mercury for AA & ICP (500 mL)
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
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