Quaternary Ammonium Compounds (QACs)
 
 
Visual Kits
Range MDL Method Kit Catalog No. Refill Catalog No.
100-1000 ppm 100 ppm Polyvinyl Sulfate K-8810 N/A
2000-20,000 ppm 2000 ppm Polyvinyl Sulfate K-8820 N/A

Method

References: Wang, L. K., Shuster, W. W.,"Polyelectrolyte Determination at Low Concentration," Ind. Eng. Chem., Prod. Res. Dev., Vol. 14, No. 4, 1975, pp. 312-314. Parazak, D. P., Burkhardt, C. W., McCarthy, K. J., "Determination of Low Levels of Cationic Polyelectrolytes in Water," Analytical Chemistry, Vol. 59, No. 10, May 15, 1987, pp. 1444-1445.

QACs are known for their bactericidal and disinfecting qualities. They are used extensively throughout the healthcare and food processing industries to sanitize, deodorize, and disinfect surfaces and equipment. QACs are also routinely formulated with various water treatments to inhibit algal growth in cooling towers, humidifiers, and swimming pools.

These tests are applicable to the monitoring of QACs in cleaning solutions and cooling waters. CHEMetrics employs a titrimetric chemistry in which stabilized polyvinyl sulfate is the titrant and toluidene blue is the end point indicator.

A color change from pink to blue signals the end of the titration. Results are expressed as ppm (mg/L) QAC.