Education Demonstration Phosphate Test Strips

SKU: 33817-P

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Use Indigo® phosphate test strips for clear, safe classroom demos of the phosphorus cycle, water pollution, and eutrophication. Ideal for chemistry or biology labs.

Phosphate testing provides a clear, hands-on way for students to explore the phosphorus cycle and its role in natural and human-influenced systems. Indigo® Phosphate Test Strips allow learners to visualize nutrient movement and accumulation through simple colorimetric changes, helping connect chemical measurements to real-world concepts such as eutrophication, algal blooms, and oxygen depletion. The straightforward dip-and-read format makes these strips well suited for classroom and teaching laboratory use.

These phosphate test strips are widely used in chemistry, biology, and environmental science education to support experiments on water pollution, nutrient loading, and ecosystem balance. Common activities include simulated watershed studies, comparisons of clean versus nutrient-enriched water, and demonstrations linking phosphorus chemistry to environmental impact. Because no reagents or instrumentation are required, they are ideal for safe, repeatable lab exercises and outreach demonstrations.

Test results appear within seconds, allowing side-by-side comparisons of clean vs. polluted samples or tap vs. runoff water. When paired with nitrate or ammonia tests, this becomes a compelling demonstration of nutrient balance and environmental stewardship.

Importance of Indigo® Phosphate Test Strip Documentation

Consistent manufacturing, lot identification, and defined shelf life support repeatable experiments, curriculum planning, and standardized lab activities in academic and institutional teaching environments.

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

Details
Discipline Learning Outcomes / Key Features
Chemistry
  • Relate phosphate ions (PO43−) to solubility, pH, and ionic equilibria.
  • Observe real-world applications of colorimetric analysis without reagents.
  • Understand concentration units (ppm) and calibration of simple test methods.
Biology
  • Describe the role of phosphate in plant growth, ATP, and cell metabolism.
  • Demonstrate the effects of nutrient excess on algae and aquatic ecosystems.
  • Connect laboratory data to biological consequences such as eutrophication.
Environmental Science
  • Explain how agricultural runoff contributes to water pollution.
  • Compare phosphate levels in natural vs. treated or simulated waters.
  • Develop environmental stewardship through monitoring and remediation discussions.

Best Practices

  • Use dechlorinated water in experiments — chlorine can interfere with color development.
  • Keep phosphate stock solutions below 10 ppm for safety and realistic environmental modelling.
  • Include control samples (0 ppm) to help students recognize the color range accurately.
  • Store test strips in a cool, dry place and avoid touching the reactive pad.
  • Encourage quantitative discussion: What does 2 ppm mean in ecological terms?
  • Cross-test with nitrate or ammonia strips for a full nutrient cycle demonstration.
Related information or images
Specifications

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

  • Phosphate is measured in increments of 10, 25, 50 & 100ppm
  • Phosphate strips have a detection limit of 5 ppm.
  • 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).
  • 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® phosphate test strips are made in USA & calibrated with NIST standards.

Test Strip Documentation

Stability Statement Certificate of Analysis SDS
Indigo Phosphate Test strips 0-100ppm Stability Statement Indigo Phosphate Test strips 0-100ppm CoA Indigo Phosphate Test strips 0-100ppm SDS
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Frequently Asked Questions

FAQ for Education Demonstration Phosphate Test Strips

Yes. They're perfect for testing natural or artificial water samples, with results visible in under a minute.

Absolutely. They contain no hazardous chemicals and require no liquid reagents or waste disposal.

Prepare two clear containers: one with tap water and one with “fertilized” water (a small amount of phosphate fertilizer). Place both near light for several days, algae will grow faster in the fertilized sample.

Students can describe the phosphate cycle, interpret concentration data, and explain how nutrient runoff impacts ecosystems.