Abstract
In anodic stripping voltammetric studies using a thin film Hg electrode and an acetate buffered base solution containing NaCl, peak currents were found to be influenced by the presence of surfactants of different charge types. The addition of mg l −1 amounts of di-stearyl dimethyl ammonium chloride, lauryl dimethyl-benzyl ammonium chloride, sodium alkyl-benzene sulfonate, sodium salt of sulfonated lauryl alcohol polyoxyethylene condensate, coconut mono-ethanol-amide ethoxylate or octa-decylamine ethoxylate caused enhancement of Cu (20%) and Pb (10%) peaks and suppression of Cd response. The magnitude of the induced changes was not directly related to surfactant type, or experimental parameters, and as a result it is recommended that when analysing waters suspected of containing surfactants, extra care should be taken in the calibration stage.
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