Evaluation of prepared natural polymers in the extraction of chlorobenzenes from environmental samples: Sol–gel–based cellulose acetatephenyltriethoxysilane fibers
Habib Bagheri, Tahereh Golzari Aqda, Marzieh Enteshari Najafabadi
Microchemical Journal, 142 (2018) 265-272
doi: 10.1016/j.microc.2018.07.006
In this research, three fibers including cellulose acetate (CA), CA–phenyltriethoxysilane (PTES) prepared via sol–gel electrospinning and sol–gel–based CA fibers immersed in PTES solution (dipped–CA–PTES) were prepared. The composition and morphology of the prepared fibers were evaluated by energy dispersive X-ray
spectroscopy and field emission scanning electron microscopy. The prepared fibers were implemented in a
home–made needle trap device, followed by thermal desorption of the selected chlorobenzenes (CBs) to a gas
chromatography–flame ionization detector. Finally, parameters affecting the extraction methodology such as the
amount of sorbent, extraction time and temperature, desorption time and temperature and the ionic strength
were investigated. Among the fabricated extractive phases, the hybrid CA–PTES fibers exhibited higher extraction efficiency. Under the optimal condition, the limits of detection were lower than 0.42 μg L-1 and the
relative standard deviations for intra– and inter–day precision for a single needle were in the range of 3–5% and
5–10%, respectively. In addition, the needle–to–needle reproducibility was from 9 to 12% (n = 3). Finally, the
method was applied to the analysis of samples from river water, sediment and sludge samples. Relative recoveries were in the range of 94–105%.