Flow Injection Sensing Strategy for Determining Cationic Surfactants in Commodity and Water Samples

The formation of stable binary water-soluble sub-micellar aggregates cetyltrimethylammonium bromide-copper-pyrocatechol violet complex (CTAB-Cu-PCV) diminishes the stability and absorbance Cu-PCV complex. A new flow injection spectrophotometric sensing strategy used for determination CTAB in commodity personal care antiseptics water samples has been established relying on above-mentioned concept. Based reduction absorption solution by at pH 6.0 430 nm, a linear decrease was observed over concentration range 2.0 to 100.0 µg mL−1 (r = 0.987). analysis method showed limits detection (3.3 ơ) quantification (10 0.08 0.27 mL−1, respectively. precision (RSD) five replicate determinations 7.9 3.7% 10 50 developed applied successfully products, namely skin lotion vaginal wash, addition samples. corresponding RSD (n 5) values were ≤8.2%.