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This paper presents a simple and convenient analytical method for determination of 1,4-dioxane in surfactants and detergents by using a novel SPME fiber. For the preparation of the fiber, the surface of a fused silica capillary tubing was modified by means of aluminium tritert-butoxide in a straightforward grafting process. The surface of our proposed fiber provides a Lewis acid-base interaction with analyte functional groups. The main factors affecting the extraction were optimized by using a central composite design method, which leads to the following optimum conditions: extraction temperature of 34°C, extraction time of 4 min, equilibrium time of 13 min, and salt content of 25% (w/v). The optimum conditions showed a linear range from 0.005 to 60 lg g -1 . LOD and LOQ of the proposed method were estimated to be 0.0015 and 0.005 lg g -1 , respectively. This method was also applied for the analysis of some real samples including ethoxylated fatty alcohol, sodium lauryl ether sulfate, dish-washing agents, and shampoos by using the standard addition method.

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