Indirect determination of surfactants by adsorptive voltammetry: Part 2: Determination of hexadecyl trimethyl ammonium bromide and cetyl pyridinium chloride in industrial and consumer products
✍ Scribed by S. B. Adeloju; S. J. Shaw
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 438 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
A method is described for the indirect determination of trace and ultratrace concentrations of hexadecyltrimethylammonium bromide (HThlAB) and ce&l pyridinium chloride (CPC) in industrial and consumer products b!. adsorpti:e voltammetrj.. The determination of HTMAB at the trace concentration was accomplished by an indirect adsorptive polarography on a dropping mercun. electrode (DRIE), while the determination of ultratrace amounts of CPC Tvds performed by an indirect adsorptive stripping voltammetry on a hanging fliercur)-drop electrode (HMDE). The detection limits accomplished for these surfactants were 5 mg/L and 10 pg/L. respectivel!.. These were up to 100 times Ion-er than those obtained by the spectrophotometric method. The linear concentration ranges accomplished for the surfactants under the specified conditions were 0-6 j mg/L and 0-300 pg/L, respective]!.. The development and the incorporation of a simple and rapid separation scheme based on the use of a CIS sep-pak cartridge with the adsorptive polarographic and voltammetric techniques were effective in overcoming the matrix interference problem from commercial domestic products. The application of the method to industrial and consumer products, such as disinfectant, lozenges, and mouth wash solutions was successful. resulting in an average recoven efficiency of 93 t 9% for both surfactants.