Journal
JOURNAL OF CHROMATOGRAPHIC SCIENCE
Volume 53, Issue 2, Pages 385-391Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/chromsci/bmu058
Keywords
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Funding
- Tehran University of Medical Sciences (TUMS), Health Services Grant [90-02-46-14580]
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A method was developed for the extraction of phthalic acid esters (PAEs) from bottled water. Surface-functionalized magnetic particles (MPs) were used as adsorbent of magnetic solid-phase extraction (MSPE). The MPs were prepared by using both polydimethylsiloxane and multiwalled carbon nanotubes. By coupling the developed MSPE with GC-MS instrument, a reliable, sensitive and cost-effective method for the simultaneous determination of six main PAEs including dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), butyl benzyl phthalate, di-n-octyl phthalate and bis(2-ethylhexyl) phthalate (DEHP) was developed. Under optimized conditions, the LODs and limits of quantification were in the range of 0.01-0.025 and 0.025-0.05 mu g/L, respectively. The calibration curves were linear (r(2) >= 0.992) over the concentration ranges from 0.05 to 20 mu g/L. Based on the intra-and interday precision values with overall RSD <= 12.40%, the method reproducibility was adequate. The recovery values of the six PAEs ranged from 91.5 to 97.8% with the RSDs < 10.64%. Finally, the developed method was successfully applied to determine PAEs in bottled water samples. DMP, DEP, DBP and DEHP were detected in most of the samples. Taken together, the developed MSPE-GC-MS method provides a new option for the determination of PAEs in aqueous samples.
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