Ship Ballast Water Treatment Quat Testing

SKU: 33819-10K

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Reliable 10,000 ppm quaternary ammonium test strips for verifying ship ballast water treatments. Fast, accurate results for IMO/USCG compliance monitoring in maritime operations.

Ship ballast water management is a global regulatory requirement to prevent the spread of invasive aquatic species. Many vessels use quaternary ammonium compounds (QACs, or quats) as part of their disinfection protocols. To ensure treatment effectiveness and regulatory compliance, operators need a simple way to measure quat levels in ballast water tanks and discharge. Indigo® 10,000 ppm quat test strips provide fast, accurate, and field-ready results.

These strips help ship operators, port authorities, and marine inspectors verify disinfection concentrations, monitor ballast water treatment system performance, and support compliance with IMO Ballast Water Management Convention and U.S. Coast Guard standards.

We've been selling quaternary ammonium (quat) test strips since 2007. Buy fully documented Indigo® QAC test strips, 100 strips/pack with a guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd"); see storage requirements in Specifications.
Details Specs Docs Reviews
Details

Ballast Water Treatment Methods – Technical Comparison

Testing Method Advantages Limitations Best Use Case
Quat Test Strips (10,000 ppm) - Instant field results (seconds)
- No equipment needed
- Portable and cost-effective
- Ideal for high concentrations		 - Semi-quantitative
- Requires visual color comparison		 Ship crews and inspectors verifying quat dosage in ballast tanks before discharge
Photometer / Colorimeter - More precise measurements
- Digital readouts
- Good for detailed lab reports		 - Requires equipment and calibration
- Higher cost per test
- Less practical onboard ships		 Laboratory verification or port authority audits requiring detailed data
Lab-Based Chemical Analysis (Titration / HPLC) - Highly accurate
- Detects impurities and degradation products
- Accepted in regulatory disputes		 - Time-consuming (days)
- Requires trained chemists
- Expensive and impractical onboard		 Regulatory laboratories or contested compliance cases
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Specifications

Dip strip & remove for immediate readings at 1000-2500-5000-10000 ppm for quaternary ammonium disinfectant concentration. Read strip results immediately. If you wait the 30 seconds needed for some other strips you will get a reading that is too high.

  • Indigo® quat test strips have a guaranteed minimum 3 year shelf life but are stored in desiccant lined vials so actual shelf life can be 5+ years.
  • Store in original packaging in a 20-30C, dry, place out of direct sunlight.
  • Detection Limit: 500 ppm; Accuracy: +/- ½ color chart unit
  • For technical explanation, read: Sanitizer Test Strip Expiration; Good Today, Dead Tomorrow?
  • These strips measure any quat formulation
  • Indigo® QAC test strips are calibrated for Oasis 146: see details. Consult your supplier if necessary.
  • The number of strips (100) per vial is approximate.
Documentation

A Certificate of Conformance is available on request after shipment.
Indigo® Quat (QAC) test strips are made in USA & calibrated with NIST standards.
QAC test strips use various surfactants, buffers, and indicators to employ the protein-error of indicators effect.

Test Strip Documentation
Stability Statement Certificate of Analysis SDS
Indigo Quat - QAC Test Strips 10000ppm Stability Statement Indigo Quat - QAC Test Strips 10000ppm Certificate of Analysis Indigo Quat - QAC Test Strips 10000ppm SDS
Reviews (2)
2024-02-14

Great Service! Easy to order and great customer service!

— Nav
2021-07-20

Easy to order online, shipment was made in a efficient timeline. Test kits appear to be working but need further experimentation to ensure results are consistent over time.

— Chet
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