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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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Reactive Cyanide Reactive Cyanide
SKU: SPEI-013

Reactive Cyanide

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Corrosivity (pH) Corrosivity (pH)
SKU: SPEI-012

Corrosivity (pH)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Nitroaromatics Nitroaromatics
SKU: SPEI-011

Nitroaromatics

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  • Brand NSI
  • Certification Single: Gravimetric and/or Volumetric
TCLP Metals in Soil TCLP Metals in Soil
SKU: SPEI-005

TCLP Metals in Soil

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  • Brand NSI
  • Matrix Soil
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Hexavalent Chromium Hexavalent Chromium
SKU: SPEI-003

Hexavalent Chromium

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

Metals in Soil

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

TPH in Soil

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  • Brand NSI
  • Matrix Soil
  • Certification Single: Gravimetric and/or Volumetric
Diesel in Soil Diesel in Soil
SKU: SPE-115

Diesel in Soil

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  • Brand NSI
  • Matrix Soil
  • Certification Single: Gravimetric and/or Volumetric
Gasoline in Soil Gasoline in Soil
SKU: SPE-114

Gasoline in Soil

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  • Brand NSI
  • Matrix Soil
  • Certification Single: Gravimetric and/or Volumetric
PVOC in Soil PVOC in Soil
SKU: SPE-113

PVOC in Soil

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  • Brand NSI
  • Matrix Soil
  • Certification Single: Gravimetric and/or Volumetric
NPW - BTEX by PID - Blind NPW - BTEX by PID - Blind
SKU: QCO-150B

NPW - BTEX by PID - Blind

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  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
NPW - BTEX by PID NPW - BTEX by PID
SKU: QCO-150

NPW - BTEX by PID

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