Journal
MICROCHIMICA ACTA
Volume 177, Issue 1-2, Pages 23-30Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-011-0752-7
Keywords
Magnetic graphene nanocomposite; Microextraction; Phthalate esters; High performance liquid chromatography
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Funding
- National Natural Science Foundation of China [31171698]
- Natural Science Foundations of Hebei [B2010000657]
- Scientific Research Foundation of Education Department of Hebei Province [2009132]
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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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