Magnetic silica nanomaterials for solid-phase extraction combined with dispersive liquid-liquid microextraction of ultra-trace quantities of plasticizers
| Autor: | Mohammad Faraji, Yadollah Yamini, Mahnaz Adeli |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Microchimica Acta. 182:1491-1499 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-015-1474-z |
| Popis: | We are presenting surface modified magnetic silica nanoparticles (m-Si-NPs) for use in solid-phase extraction combined with dispersive liquid-liquid microextraction (DLLME). The m-Si-NPs were surface-functionalized with octadecyl groups to give a material for the extraction of the plasticizers dibutyl phthalate, di(2-ethylhexyl) adipate and di(2-ethylhexyl) phthalate from water samples. The functionalized m-Si-NPs were characterized by scanning electron microscopy, FTIR spectroscopy, thermal gravimetric analysis, and vibrating sample magnetometry. The results showed that the m-Si-NPs were well functionalized with octadecyl groups. The effects of various experimental variables on the extraction efficiencies were investigated. The analytes were quantified by GC/FID. Under optimal conditions, the calibration plots are linear in the range from 0.01 to 100 μg∙L‾1, and very high enrichment factors (mean value ~20,000) were obtained. As a result of the high enrichment factors, the detection limits are as low as 2–3 ng∙L‾1. The method was successfully employed to the extraction of the plasticizers from (spiked) water samples, and recoveries are in the order of 93.9 to 106.7 %. The method is low cost, fast, and very sensitive. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|