Magnetic graphene oxide for efficient solid phase extraction of DEHP

DEHP (di-2-ethylhexyl phthalate) can cause negative impacts on human health, thus development of reliable analytical methods for the determination of PAEs is important. In this work, magnetic graphene oxide was synthesized and used as the sorbent for solid phase extraction of DEHP. Factors that influence the extraction efficiency of DEHP were studied. The optimum conditions, such as solution pH, extraction time, desorption time, and eluent type and volume were obtained. The analytical performance of the developed method was investigated, and it was found that the limit of detection (LOD) for DEHP was 0.35 mu g/L and the related standard deviation (RSD) was 4.3 %. The proposed method was applied in the determination of DEHP in environmental water samples with recoveries of 91.6-106.5%.