Skip to Main Content

Select country

Select your country

Environmental Certified Reference Materials and Proficiency Test Standards

Our wastewater standards enhance your testing accuracy and efficiency. Regular use of our certified reference materials (CRMs) and proficiency test (PT) standards ensures high data quality and supports accreditation needs.

We specialize in ISO-accredited CRMs and effluent standards that are stable and integrate seamlessly into routine workflows. Pre-measured, single-use materials help prevent errors and simplify processes. For example, try our GGA Concentrate Snips™: just snip and pour into a 300 mL BOD bottle—no measurements or contamination. Our versatile, multiparameter CRMs streamline testing procedures, reducing the need for multiple CRMs in your lab. Watch the demonstration video to learn more!

Categories and filters

Filter / Sorting

Categories

Brand

Accreditations

Product Type

Regulatory Method

Instrument / Test

Analyte - Single / Multi

CAS #

Analyte / Component

Microorganism

2,562 Items found

Per Page:
Sort by:
Turbidity QC Check Standards 100 NTU (500 mL) Turbidity QC Check Standards 100 NTU (500 mL)
SKU: QCI-152

Turbidity QC Check Standards 100 NTU (500 mL)

Login to view pricing
  • Brand NSI
  • Concentration 100 NTU
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Stable Sulfide Standard 10mg/mL Stable Sulfide Standard 10mg/mL
SKU: QCI-147

Stable Sulfide Standard 10mg/mL

Login to view pricing
  • Brand NSI
  • Concentration 10mg/mL
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Stable Sulfide Standard 1mg/mL Stable Sulfide Standard 1mg/mL
SKU: QCI-147L

Stable Sulfide Standard 1mg/mL

Login to view pricing
  • Brand NSI
  • Concentration 1mg/mL
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Perchlorate Concentrate - Blind Perchlorate Concentrate - Blind
SKU: QCI-146B

Perchlorate Concentrate - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Perchlorate QC Concentrate CRM Perchlorate QC Concentrate CRM
SKU: QCI-146

Perchlorate QC Concentrate CRM

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
Complex Nutrients Concentrate - Blind Complex Nutrients Concentrate - Blind
SKU: QCI-139B

Complex Nutrients Concentrate - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Complex Nutrients QC Concentrate Complex Nutrients QC Concentrate
SKU: QCI-139

Complex Nutrients QC Concentrate

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients Concentrate - Blind Simple Nutrients Concentrate - Blind
SKU: QCI-138B

Simple Nutrients Concentrate - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients QC Concentrate CRM Simple Nutrients QC Concentrate CRM
SKU: QCI-138

Simple Nutrients QC Concentrate CRM

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Hardness QC CRM (4 x 250 mL) Hardness QC CRM (4 x 250 mL)
SKU: QCI-137C

Hardness QC CRM (4 x 250 mL)

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Hardness - Blind Hardness - Blind
SKU: QCI-137B

Hardness - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
Hardness QC CRM Hardness QC CRM
SKU: QCI-137

Hardness QC CRM

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