Determination of Parabens in Surface Water from Mogi Guacu River (Sao Paulo, Brazil) Using Dispersive Liquid-Liquid Microextraction Based on Low Density Solvent and LC-DAD

作者：Galinaro Carlos A^*; Pereira Fabiana M; Vieira Eny M

来源：Journal of the Brazilian Chemical Society, 2015, 26(11): 2205-2213.

DOI：10.5935/0103-5053.20150206

• dispersive liquid-liquid microextraction
• low density solvent
• Mogi Guacu River
• paraben
• sample preparation

A method using dispersive liquid-liquid microextraction (DLLME) based on low density solvent (LDS) combined with liquid chromatography with diode array detection (LC-DAD) has been developed for determination of parabens. Some DLLME parameters such as kind and volumes of extraction and disperser solvents, pH of the aqueous samples, ionic strength, extraction, centrifugation and speed time, were investigated. The method exhibits good linearity (0.9990 to 0.9993), limits of detection (0.5-0.8 mu g L-1), and limits of quantification (1.3-2.4 mu g L-1). In optimum conditions, enrichment factors and recoveries of studied parabens obtained were 38.9 to 88.4% and 30.3 to 68.0%, respectively. Surface water samples collected from Mogi Guacu River (Sao Paulo state, Brazil) were analyzed, showing average contents of methyl-, ethyl-, propyl-, and n-butylparaben of 8.0, 5.8, 13.1 and 15.1 mu g L-1, respectively. This is the first study on parabens in a Brazilian River, in a long stretch of river (ca. 300 km of extension).

• 出版日期2015-11