Salari, Elahe (2018) Development of a new pH-assisted liquid phase m croextraction using a switchable solvent for the de-termination of polychlorinated biphenyls (PCBs). Masters thesis, university of zabol.
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Development of a new pH assisted liquid phase m croextraction using a switchable solvent for the d termination of polychlorinated biphenyls PCBs.pdf Download (86kB) | Preview |
Abstract
Polychlorinated biphenyls (PCBs) are a class of synthetic organic compounds that are hazardous due to their chemical and thermal stability, hydrophobicity and toxic properties [1-2]. Because of their chemical and thermal stability, PCBs has an appli-cation in wide range of industries and may enter the environment. PCBs are on the list of priority pollutants of Environmental Protection Agency which are required to be analyzed with adequate methods. But, PCBs often exist at trace levels of concen-tration in the environment, so an effective pretreatment step is necessary for their preconcentration before quantification. In this study, a new method was successfully developed for the simultaneous determination of seven polychlorinated biphenyls in aqueous samples with switchable hydrophilicity solvent based liquid phase microex-traction coupled to GC-MS detection. The factors influencing the extraction effi-ciency, including type and volume of extraction solvent, pH and volume of aqueous sample, extraction time, and salt addition were investigated and optimized. Under the optimized conditions, good linearity (0.5-150 µg/L) and limits of detection (0.15 µg/L) were obtained for the PCBs by the proposed method. Also, the relative stand-ard deviation was calculated between 5.2 and 6.4 %. Finally, the proposed method was successfully applied for the analysis of PCBs in various real samples
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Polychlorinated biphenyls, Triethylamine, Switchable solvent, Homogeneous liquid phase microextraction |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 06 Jan 2025 07:33 |
| Last Modified: | 06 Jan 2025 07:33 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/3726 |
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