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Scheduled Proficiency Testing & PT Express™ 

As a leader among proficiency testing providers, we are proud to offer NSI Lab Solutions ISO 17043-accredited proficiency testing to environmental, food science, and cannabis/hemp testing laboratories. Our accredited PTs are also available through our on-demand PT Express version, allowing you to receive your final graded report within 48 hours after submitting results — no scheduled test selection required.

Past report copies and data entry are available 24/7 using our secure online PT Datalink. Scheduled proficiency testing is also available throughout the year. You may also be interested in our analytical reference materials.

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Environmental

Our studies include all analytes required by TNI fields of testing. All quantitative samples are supplied in duplicate.

Food & Agriculture

NSI Lab Solutions Food Microbiology Proficiency Testing (PT) studies are designed for your convenience and success.

Cannabis & Hemp

Cannabis & Hemp proficiency testing studies are designed for your convenience and success.

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769 Items found

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Hexavalent Chromium – Blind Hexavalent Chromium – Blind
SKU: SQCI-003B

Hexavalent Chromium – Blind

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  • Brand NSI
  • Certification Single: Grav. w/Analytical Confirmation
  • Raw Material >95% min; as available
Hexavalent Chromium Hexavalent Chromium
SKU: SQCI-003

Hexavalent Chromium

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Metals in Soil – Blind Metals in Soil – Blind
SKU: SQCI-001B

Metals in Soil – Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Metals in Soil Metals in Soil
SKU: SQCI-001

Metals in Soil

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
TPH in Soil - Blind TPH in Soil - Blind
SKU: SQC-116B

TPH in Soil - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
TPH in Soil TPH in Soil
SKU: SQC-116

TPH in Soil

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Diesel in Soil - Blind Diesel in Soil - Blind
SKU: SQC-115B

Diesel in Soil - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Diesel in Soil Diesel in Soil
SKU: SQC-115

Diesel in Soil

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Gasoline in Soil - Blind Gasoline in Soil - Blind
SKU: SQC-114B

Gasoline in Soil - Blind

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Gasoline in Soil Gasoline in Soil
SKU: SQC-114

Gasoline in Soil

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
PVOC in Soil - Blind PVOC in Soil - Blind
SKU: SQC-113B

PVOC in Soil - Blind

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  • Brand NSI
  • Matrix Methanol
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
PVOC in Soil PVOC in Soil
SKU: SQC-113

PVOC in Soil

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