Abstract
The effect of the addition of surface active agents was studied for the direct flame atomic absorption spectrophotometric determination of metals such as cadmium, chromium, copper, lead, and nickel in waste water containing fatty oil.Absorbances of the elements were increased by the addition of oleyl-12, hexadecyltrimethylammonium bromide, Tween-20, sodium dodecylbenzenesulfonate and Brij-35 for emulsifying fatty oil in aqueous solution. The enhancing of absorbance was independent of the type of surface active agents used, but was dependent on the stability of emulsion.It was found that the effective amount of surface active agents was about 0.21.0% region for a sample solution containing less than 10% of fatty oil, but in the case of large content of fatty oil (More than 20%), this method is carried out after diluted with water to a suitable concentration.
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