Skip to Main Content

Select country

Select your country

Scheduled Proficiency Testing & PT Express™ for Environmental Testing

  • Certified for environmental methods — plate counts, MPN
  • COA includes expected values for multiple methods
  • Robust — lyophilized technique ensures strong recovery, even for 44.5 ºC coliform methods
  • Unique — multi-organism CRM covers six methods in a single pellet

Search by Category

DMRQA

The Discharge Monitoring Report-Quality Assurance Study Program (DMRQA) plays a critical role in monitoring compliance with environmental regulations, ensuring the accuracy of data, identifying trends and patterns, and promoting transparency and accountability in environmental management.

Drinking Water Standards

NSI offers a wide range of Certified Reference Materials (CRMs) for drinking water analysis to ensure environmental and human health. Offerings include testing standards for pH, residual free chlorine, turbidity, trace metals, mercury, fluoride, and nitrite.

Legionella

Legionella certified reference materials are crucial for ensuring the accuracy and reliability of testing methods used to detect the presence of Legionella bacteria in water systems.

Soil/UST Standards

Soil and Underground Storage Tank (UST) standards are fundamental regulations established to preserve the environment and human health from hazards associated with underground storage tanks.

Wastewater Standards

Wastewater analysis is a powerful public and environmental health tool. We are laser-focused on manufacturing and delivering unique ISO-accredited Certified Reference Materials (CRMs) that are not only stable but also easy to use and implement.

Categories and filters

Filter / Sorting

Categories

Brand

Accreditations

Product Type

Regulatory Method

Instrument / Test

Analyte - Single / Multi

CAS #

Analyte / Component

222 Items found

Per Page:
Sort by:
Reactive Cyanide Reactive Cyanide
SKU: SPEI-013

Reactive Cyanide

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

Corrosivity (pH)

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

Nitroaromatics

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

TCLP Metals in Soil

Login to view pricing
  • 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

Login to view pricing
  • 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

Login to view pricing
  • 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

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

Diesel in Soil

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

Gasoline in Soil

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

PVOC in Soil

Login to view pricing
  • 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

Login to view pricing
  • Brand NSI
  • Matrix Methanol solution
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Trace Level Mercury Concentrate - Blind Trace Level Mercury Concentrate - Blind
SKU: QCO-137B

Trace Level Mercury Concentrate - Blind

Login to view pricing
  • Brand NSI
  • Matrix Nitric acid
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
AlertAlertBrowse fileDownload fileFileImagePdfWordTextExcelPowerpointArchiveCsvAudioVideoSpinnerCalendarReturn arrowMinusVisibleInvisibleVisibleInvisibleConfigure