Gold nanoparticles-based colorimetric determination of cationic surfactants in environmental water samples via both electrostatic and hydrophobic interactions
| Autor: | Swapan Sahu, Kamlesh Shrivas, Anupam Ghorai, Ravi Shankar |
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| Rok vydání: | 2015 |
| Předmět: |
Detection limit
Ammonium bromide 010401 analytical chemistry Cationic polymerization Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Cetylpyridinium chloride 01 natural sciences 0104 chemical sciences Analytical Chemistry Hydrophobic effect chemistry.chemical_compound chemistry Bromide Colloidal gold Surface plasmon resonance 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microchimica Acta. 183:827-836 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-015-1689-z |
| Popis: | We report on a simple, rapid and sensitive colorimetric assay for the quantitation of cationic surfactants (CS+) in domestic effluent, municipal waste and surface water samples. The method is based on the aggregation of tartrate-capped gold nanoparticles (AuNPs) through both electrostatic and hydrophobic interactions that occur between CS+ and AuNPs. Aggregation results in a color change from pink to blue which is due to a shift in the localized surface plasmon resonance band. The detergent cetylpyridinium chloride (CPC) was chosen as a model compound for optimization of the method for determination of a CS+. Under optimized experimental conditions (pH 9.0; reaction time 5 min; 25 nM concentration of AuNPs), a linear calibration plot was obtained for quantitative determination of CPC, cetyltrimethylammonium bromide (CTAB), dodecyltrimethyl ammonium bromide (DTAB) in the range of 10–500, 10–200 and 10–300 ngmL−1, respectively and the limit of detection was 3 ngmL−1 for CPC, CTAB and DTAB. |
| Databáze: | OpenAIRE |
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