A New Aluminium Hydroxide Coating on Fused Silica Fiber for the Determination of 1,4-Dioxane in Surfactants and Detergents Using HS-SPME-GC

Abstract

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.

Precise measurement of 1,4‐dioxane concentration in cleaning products: A review of the current state‐of‐the‐art

“…The most unclear aspect of determining an approach for measuring 1,4‐dioxane in commercial personal and home care products and cosmetics is the means of sample preparation and injection into the GC column, to selectively isolate 1,4‐dioxane in a concentrated form. One method that has yielded LOQ values below 1 ppm is SPME applied to the headspace of a vial containing a sample of product (Table 3) (Castor, Doherty, et al, 2021; Fuh et al, 2005; Hosseiny Davarani et al, 2012). A recent study employing SPME with GC–MS/MS analysis obtained an LOQ of 0.037 ppb for a spiked reference material based on personal care products (Castor, Doherty, et al, 2021).…”