Validated spectrophotometric assessment of 1,4-dioxane in drinking water by amionhydroxynaphthlene sulfonic acid (AHSA)

A selective, facile, and highly efficient spectrophotometric approach was established for the determination of 1,4-dioxane in drinking water quantitatively. This approach depends on the reac- tion selectively of 1,4-dioxane with 1-Amino-2-naphthol-4-sulpho- nic acid (AHSA) to give an instantly complex measured at 340 nm. The maximum spectra development with high intensity of dioxane- AHSA complex was obtained at 15 min. Variable parameters that affecting the dioxane-AHSA efficacy were estimated and optimised. Under optimal conditions, the dioxane-AHSA complex obeyed Beer’s law within the range of 0.5–15 mg/L of 1,4-dioxane with a regression factor of 0.996 (n = 5) and a detection limit of 16 μg/ L. The results of precision and accuracy within-day were ≤2.0% in terms of relative standard deviation (RSD%), which confirmed the reproducibility of the analytical performance. The proposed method was applied successfully in the simultaneous assessment of 1,4-dioxane in an aqueous solution. The accuracy and reliability of the developed approach recommended being applied in all quality control of water companies without the use of sophisticated instrumentation and procedure.