About this Chemistry article
Multiwall Carbon Nanotube- Zirconium Oxide Nanocomposite Hollow Fiber Solid Phase Microextraction for Determination of Polyaromatic Hydrocarbons in Water, Coffee and Tea Samples by Mahnaz Nozohour Yazdi; Yadollah Yamini; Hamid Asiabi is a Chemistry article available to read on EtoBox.
The purpose of this study was to evaluate the application of hollow fiber solid-phase microextraction (HF-SPME) followed by HPLC-UV to determine the ultra-trace amounts of polycyclic aromatic hydrocarbons (PAHs) as model analytes in complex coffee and tea samples. HF-SPME can be effectively used as an alternative to the direct immersion SPME (DI-SPME) method in complex matrices. The DI-SPME method suffers from serious limitation in dirty and complicated matrices with low sample clean-up, while the HF-SPME method has high clean-up and selectivity due to the high porosity of hollow fiber that can pick out analyte from complicated matrices. As a hollow fiber sorbent, a novel multiwall carbon nanotube/zirconium oxide nanocomposite (MWCNT/ZrO) was fabricated. The excellent adsorption of PAHs on the sorbent was attributed to the dominant roles of π-π stacking interaction and hydrophobic interaction. Under the optimized extraction conditions, the wide linear range of 0.1-200 μg L with coefficients of determination better than 0.998 and low detection limits of 0.033-0.16 μg L with satisfactory precision (RSD < 6.6%) were obtained. The relative recoveries obtained by spiking the PAHs in wat
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- Author
- Mahnaz Nozohour Yazdi; Yadollah Yamini; Hamid Asiabi
- Published
- 2018
- Language
- EN
- Field
- Chemistry (Physical Sciences)