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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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Conductivity Standard at 25 ?ºC at 100 µmhos in H2O (500 mL) Conductivity Standard at 25 ?ºC at 100 µmhos in H2O (500 mL)
SKU: WQC-COND-500

Conductivity Standard at 25 ?ºC at 100 µmhos in H2O (500 mL)

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  • Brand HPS
  • Matrix H2O
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/ Wet Chem
Texas TPH in Water - Blind Texas TPH in Water - Blind
SKU: TX-1005WQCB

Texas TPH in Water - Blind

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  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Matrix Water
  • Raw Material >95% min; as available
Texas TPH in Water Texas TPH in Water
SKU: TX-1005WQC

Texas TPH in Water

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Texas TPH in Water Texas TPH in Water
SKU: TX-1005WPT

Texas TPH in Water

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  • Brand NSI
  • Matrix Water
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Texas TPH in Soil - Blind Texas TPH in Soil - Blind
SKU: TX-1005SQCB

Texas TPH in Soil - Blind

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  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Raw Material >95% min; as available
Texas TPH in Soil Texas TPH in Soil
SKU: TX-1005SQC

Texas TPH in Soil

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Texas TPH in Soil Texas TPH in Soil
SKU: TX-1005SPT

Texas TPH in Soil

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  • Brand NSI
  • Matrix Soil
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
CONDUCTIVITY (TDS AS KCL) 650 PPM  (500 mL) CONDUCTIVITY (TDS AS KCL) 650 PPM  (500 mL)
SKU: TDS-2-500

CONDUCTIVITY (TDS AS KCL) 650 PPM (500 mL)

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  • Brand Spex
  • Matrix H2O
  • Concentration 650 PPM
CONDUCTIVITY (TDS AS KCL) 65 PPM (500 mL) CONDUCTIVITY (TDS AS KCL) 65 PPM (500 mL)
SKU: TDS-1-500

CONDUCTIVITY (TDS AS KCL) 65 PPM (500 mL)

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  • Brand Spex
  • Matrix H2O
  • Concentration 65 PPM
PCB in Transformer Oil - Blind PCB in Transformer Oil - Blind
SKU: SQCO-072B

PCB in Transformer Oil - Blind

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  • Brand NSI
  • Matrix Transformer Oil
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
TOX in Soil - Blind TOX in Soil - Blind
SKU: SQCO-038B

TOX in Soil - Blind

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Organophosphorus Pesticides - Blind Organophosphorus Pesticides - Blind
SKU: SQCO-021B

Organophosphorus Pesticides - Blind

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