Quaternary Ammonium Sanitizer Concentration Test Strips This method is suitable for on-site rapid test of quaternary ammonium concentration in quaternary ammonium sanitizer. E.g. testing single-chain or double-chain quaternary ammonium such as cetyl trimethyl ammonium bromide, double decyl dimethyl ammonium chloride, tetradecyl dimethyl benzyl ammonium chloride, etc. The test range is 0～4000ppm (mg/L).