Salehi, Mozhgan (2018) Determination of polycyclic aromatic hydrocarbons using homogeneous liquid-liquid microextraction coupled with gas chromatography–mass spectrometry. Masters thesis, university of zabol.
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Abstract
Recently, a new group of compounds, namely switchable hydrophilicity solvents (SHSs), has been introduced into the extraction field. In this study, a new pH assisted homogeneous liquid-liquid microextraction method based on SHSs followed by GCMS detection has been developed for preconcentration and determination of polycyclic aromatic hydrocarbons (PAHs) in water samples. PAHs are important compounds because of their prevalence in the environment.The extraction technique makes use of 200 μL of a water-immiscible solvent (Dipropylamine) that can be solubilized in the aqueous phase (6 mL) using HCl as a reagent. Afterwards, phases separation is induced by the addition of sodium hydroxide. The effects of Experimental parameters of the extraction such as, temperature, time, volume of acceptor phase, pH of donor phase, and ionic strength of solution were investigated. Under the optimum conditions, proposed method provided good linearity ities in the renge of 2–1000 μg L−1 for anthracene and pyrene and 4-1000 μg L−1 for naphtalene, low limits of detection for anthracene and pyrene 0.6 μg L−1 and for naphthalene 1/21 μg L−1 and acceptable extraction repeatabilities (RSD% = 4.3-6.8). Finally, the proposed method allows the determination of the target analytes in different types of natural water samples and acceptable recoveries were obtained
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Homogeneous liquid–liquid microextraction, Switchable hydrophilicity solvent, N,N-Dipropylamine, Polycyclic aromatic hydrocarbons |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 24 Nov 2018 08:40 |
| Last Modified: | 09 Mar 2019 07:11 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/2287 |
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