Residual Quat 10-100 ppm

SKU: 33819-100

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Accurate Indigo® 0–100 ppm quat (QAC) test strips for detecting sanitizer residues on food, equipment, and packaging. Supports HACCP, FDA, USDA organic & export compliance.

Indigo® residual quat test strips (10–100 ppm range) can verify low-level sanitizer residues in food, beverage, and agricultural settings. Quaternary ammonium compounds (QACs, or “quats”) are widely used as disinfectants and surface sanitizers because of their strong antimicrobial activity.

However, in organic food production, export markets, and HACCP programs, residual quat levels need remain below regulatory limits. These 10–100 ppm QAC test strips provide fast, reliable on-site testing for processors, inspectors, and certification auditors & are important for organic food certification. The strips are particularly sensitive to cetylpyridinium chloride which is used to treat chicken for microbes such as Salmonella sp.

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Details

The directions on the test strip bottle are for testing liquid quat solutions. Test surfaces for residues by first wetting the strip's testing pad with water (deionized or distilled if available). Then press against fruits, vegetables, cutting boards, utensils, etc. for at least 10 seconds & then compare against the color chart.

Levels less than "10" ppm are impossible to determine but some organic certifications call for "0" ppm. This is because water alone causes a reading of 10ppm. Read more in our blog on What 10ppm really means? when measured on surfaces of knives, cutting boards, fruits or vegetables.

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Specifications

Swish strip in liquid 5 times & then compare to color chart after 10 seconds.

  • Read ≤10-30-60-80-100ppm ppm for quaternary ammonium disinfectant concentration.
  • Indigo® quat test strips have a guaranteed minimum 3 year shelf life but desiccant lined vials allow for 5+ years.
  • Store at 20-30C, in a dry place out of direct sunlight.
  • For technical explanation, read: Sanitizer Test Strip Expiration; Good Today, Dead Tomorrow?
  • Indigo® QAC test strips are calibrated for Oasis 146, see details.
    Consult your supplier if any special testing is necessary for their formulation.
  • Solution temperatures from ~30-45C can cause strips to read up to ½ unit a chart unit higher.
    Temperatures above 45C can shift the results 1 chart unit higher. Testing at room temperature
  • Hard water (above 500 ppm) can cause the strips to read high by up to 1 chart unit.
  • The number of strips (100) per vial is approximate.
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