Abstract
The novelty of this work is comparison of three dispersive microextraction methods including DLLME, DLLME-SLW, DLLME-SFO by Taguchi L32 orthogonal array design. For this aim, the above-mentioned dispersive liquid–liquid microextraction methods (followed by gas chromatography) were used for determination of methyl methacrylate in produced water. Methyl methacrylate is readily absorbed into the blood via lungs, gastrointestinal tract, and skin and there are several reports of reactions in individuals exposed to it including nervous system symptoms and several cancer mortalities. The parameters affecting the extraction performance of methyl methacrylate were evaluated and optimized including the kind and the volume of extraction and dispersive solvents; solution’s acidity, ionic strength and temperature; and extraction time. Orthogonal array design showed that among them, acidity (38–48 %) had the highest contribution on extraction performance. Other parameters were ranked as the next effective parameters. Under the optimum conditions, the figures of merits were determined to be LOD = 23, 10, 8 μg/L, linear range = 44–240, 20–180, 12–250 μg/L, RSD = 7, 11, 7 % (n = 6) for above-mentioned methods, respectively. The maximum recovery under the optimized condition was determined to be 68.5, 79.4, 80.0 %, respectively. Based upon the results, DLLME-SFO depicted lower LOD, wider linear range, lower RSD and maximum recovery.
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