Abstract
We have developed a highly sensitive microextraction method for the preconcentration of some phthalate esters such as diethyl phthalate, di-n-propylphthalate, di-n-butyl-phthalate, dicyclohexyl-phthalate, and diethyl-hexyl phthalate prior to their determination by HPLC. It is based on a magnetic graphene nanocomposite as an effective adsorbent. The effects of the amount of the extractant composite employed, extraction time, pH values, salt concentration and desorption conditions were investigated. Under the optimum conditions, the enrichment factors range from 1574 to 2880. Response is linear in the concentration range from 0.1 to 50 ng mL−1. The limits of detection (at S/N = 3) were between 0.01 and 0.04 ng mL−1. The method was successfully applied to the determination of five phthalate esters in water and beverage samples.
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Financial support from the National Natural Science Foundation of China (No. 31171698), the Natural Science Foundations of Hebei (B2010000657) and the the Scientific Research Foundation of Education Department of Hebei Province (2009132) is gratefully acknowledged.
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Wu, Q., Liu, M., Ma, X. et al. Extraction of phthalate esters from water and beverages using a graphene-based magnetic nanocomposite prior to their determination by HPLC. Microchim Acta 177, 23–30 (2012). https://doi.org/10.1007/s00604-011-0752-7
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DOI: https://doi.org/10.1007/s00604-011-0752-7