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Graphene oxide based molecularly imprinted polymers modified with β ‐cyclodextrin for selective extraction of di(2‐ethylhexyl) phthalate in environmental waters
Author(s) -
Wang Chengjun,
Cheng Lidong,
Zhang Lin,
Zuo Yuegang
Publication year - 2019
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201801171
Subject(s) - detection limit , molecularly imprinted polymer , extraction (chemistry) , chromatography , solid phase extraction , chemistry , phthalate , cyclodextrin , fourier transform infrared spectroscopy , desorption , analytical chemistry (journal) , selectivity , adsorption , chemical engineering , organic chemistry , catalysis , engineering
Graphene oxide based molecularly imprinted polymers modified with β ‐cyclodextrin were prepared as solid‐phase extraction column sorbents for specific recognition and sensitive detection of di(2‐ethylhexyl) phthalate in water samples. The morphology and composition of synthesized sorbents were characterized by scanning electron microscopy, thermo‐gravimetric analysis, Raman spectroscopy, and Fourier‐transform infrared spectroscopy. The conditions affecting the performance of extraction procedures such as desorption solvent types and volume, sample pH and volume were investigated. The loading capacity (8.2 μg/mg) of the prepared sorbents increased eight times after modification with β ‐cyclodextrin. The developed extraction procedures coupled to high‐performance liquid chromatography exhibited good linearity (0.2–500 μg/L), low limit of detection (0.052 μg/L), and good precision (relative standard deviation˂5.7%) under optimized conditions. The developed solid‐phase extraction technique with prepared sorbents has been successfully applied in extracting trace di(2‐ethylhexyl) phthalate from real natural waters with high efficiency, good selectivity, and desirable recoveries.