Nitrate Nitrite Test Strips 50/Vial

SKU: 33817-NN

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Get fast, reliable color results for nitrate & nitrite in water, food, and biological systems in teaching laboratories, industry & environmental monitoring with Indigo® Nitrite-Nitrate test strips.

Indigo® Nitrite-Nitrate Test Strips provide a fast, semi-quantitative method for detecting reactive nitrogen species across water, food, and biological systems. Common applications include drinking water screening, aquaculture and aquarium monitoring, agricultural runoff, hydroponic nutrient solutions, soil and substrate extracts, and food processing checks. Each strip produces a clear colorimetric result in under one minute using an easy-to-read chart covering 0-50 mg/L (ppm) nitrite and 0-500 mg/L (ppm) nitrate; no reagents, meters, or glassware required.

These nitrate and nitrite test strips are widely used in environmental monitoring, wastewater and bioreactor operations, food processing, education, and research laboratories for rapid screening and trend observation. They support routine checks where immediate feedback is valuable, including process startup, troubleshooting, training, and field verification. While laboratory methods remain the standard for regulatory reporting, strip-based testing offers a practical complement for frequent monitoring and informed decision-making between formal analyses.

Ideal for well water nitrate testing, aquaculture monitoring, hydroponic nutrient control, food nitrate residue screening, and bioreactor efficiency studies, Indigo® test strips give rapid insights into nitrogen cycling and contamination risks. Teachers and students can use them to demonstrate the conversion of ammonia to nitrate, the role of denitrifying bacteria, and the environmental impact of eutrophication, all with a simple classroom-safe tool.

They’re also practical for public health inspections, environmental compliance checks, and industrial wastewater management where quick nitrogen data is essential.

Nitrite-Nitrate Test Strips vs. Liquid Reagent Kits

Feature Test Strips Liquid Reagent Kits
Ease of Use Simple dip-and-read; no chemicals or glassware. Multiple reagents; requires pipetting and mixing.
Testing Time 1 minute or less. Up to 10 minutes for full color development.
Portability Highly portable; no instruments needed. Bulky kit; best for lab work.
Precision ±10–20 ppm depending on lighting and interpretation. Higher precision; suitable for quantitative lab analysis.
Ideal Use Field screening, education, routine checks. Formal compliance testing and research validation.

For most users, whether monitoring environmental water quality, checking nutrient solutions, or teaching chemical testing, nitrate/nitrite strips strike the ideal balance between speed, affordability, and simplicity. While reagent-based or probe systems provide greater precision for regulatory compliance or research, test strips remain the most accessible tool for routine screening and educational demonstrations across a wide range of applications.

Who Uses These Strips?

  • Homeowners and well-water users
  • Public health labs and inspectors
  • Teachers covering toxicology, biology, and chemistry

Documentation & Compliance Support for Nitrate/Nitrite Testing

Indigo® Nitrite-Nitrate Test Strips are supported by comprehensive documentation designed to meet the expectations of regulated, institutional, and quality-driven users. Each product includes lot identification, defined shelf life, and supporting certificates to ensure traceability, repeatability, and audit readiness across diverse applications.

Does your organization need to monitor nitrate/nitrate levels involving:
Environmental and drinking water screening programs?
Wastewater and bioprocess monitoring under SOP control?
Food safety and quality assurance systems?
Academic, teaching, and research laboratories?
Supplier qualification and institutional procurement requirements?

Regulatory and Oversight Frameworks Supported by Indigo® Instruments Documentation

  • U.S. EPA drinking water and environmental monitoring guidance
  • WHO drinking water guideline frameworks
  • State and provincial environmental agencies
  • HACCP and food safety quality systems
  • GMP-aligned laboratory and industrial quality programs
  • Public health, education, and institutional audit requirements

This documentation ensures that even rapid, semi-quantitative test methods can be confidently integrated into formal monitoring programs, training protocols, and quality systems.

We've been selling nitrate-nitrite test strips since 2009. Buy fully documented Indigo® nitrate-nitrite test strips, 50 strips/vial. Guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd").

Details
Discipline Learning Outcomes / Key Features
Environmental Science Understand nitrogen cycling and the sources of nitrate/nitrite pollution in natural and engineered systems.
Biology / Microbiology Demonstrate nitrification and denitrification by soil and aquatic microbes using real-time test data.
Chemistry / Analytical Science Compare test strip colorimetry with wet-chemical or spectrophotometric methods to discuss detection limits and accuracy.
Public Health / Safety Relate nitrate and nitrite levels to health guidelines (e.g., WHO, EPA) and discuss risks such as methemoglobinemia.

Tips for Best Results

  • Use clean, clear samples — cloudy or colored water can distort readings.
  • Dip for 1 second and read within 60 seconds under consistent lighting.
  • Avoid touching the test pads; handle from the top edge only.
  • Store strips tightly capped in a cool, dry place.
  • Record color results immediately for consistent comparisons.
Related information or images
Specifications

This Indigo® test strip indicates the presence of nitrate & nitrite. Results for ranges shown below can be read in 30 seconds.

  • Nitrate is measured in increments of 10, 25, 50, 100, 250, & 500ppm
  • Nitrite is measured in increments of 1, 5, 10, & 25ppm
  • The number of strips (50) vial is approximate.
  • These strips have a guaranteed shelf of 3 years from date of manufacture (indicated by expiration date).
  • These strips are extremely sensitive to airborne humidity.
  • Reseal the desiccant lined bottle immediately after removing a strip to ensure 3 year shelf life.
  • Vial must be kept tightly sealed & kept at typical room temperatures.
Documentation

A Certificate of Conformance is available on request after shipment.
Indigo® pH test strips are made in USA & calibrated with NIST standards.

Test Strip Documentation

Stability Statement Certificate of Analysis SDS
Indigo Nitrite Test Strips 25ppm Nitrate 500ppm Stability Statement Indigo Nitrite Test Strips 25ppm Nitrate 500ppm Certificate of Analysis Indigo Nitrite Test Strips 25ppm Nitrate 500ppm SDS
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Frequently Asked Questions

FAQ for Nitrate Nitrite Test Strips 50/Vial

They are semi-quantitative and ideal for screening. For high-precision work, use a lab-based method such as ion chromatography or spectrophotometry.

Yes, though very high salinity may slightly alter color response. Calibrate visually against fresh water samples if possible.

Absolutely. They use no hazardous reagents and are perfect for demonstrations of nitrogen cycling or pollution