Modified layered bimetallic compound used as a novel adsorbent for the solid-phase extraction of monoaromatic hydrocarbons from water samples prior to gas chromatography–mass spectrometry
| Autor: | Zepeng Wang, Yong Wang, Xiaping Zhu, Hongbao Zuo, Ping Zhao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chromatography
General Chemical Engineering Sodium dodecylbenzenesulfonate Extraction (chemistry) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences Ethylbenzene 0104 chemical sciences lcsh:Chemistry chemistry.chemical_compound Adsorption lcsh:QD1-999 chemistry Solid phase extraction Gas chromatography–mass spectrometry 0210 nano-technology Enrichment factor |
| Zdroj: | Arabian Journal of Chemistry, Vol 13, Iss 2, Pp 4246-4253 (2020) |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2019.07.004 |
| Popis: | This study reports a promising method of solid-phase extraction for determining the toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, 1,3,5-trimethylbenzene, and 1,2,4-trimethylbenzene in water samples by gas chromatography–mass spectrometry (GC–MS). Prior to this procedure, the magnesium–aluminum bimetallic hydroxides modified with sodium dodecylbenzenesulfonate (Mg/Al-SDBS-LDH) were prepared and served as the novel solid-phase extractant. The Mg/Al-SDBS-LDH has advantage of good hydrophobicity and larger spacing which facilitates the monoaromatic hydrocarbons (MAHCs) into the interlayer for adsorption. As a result, the seven MAHCs in 500 mL water samples were enriched greatly, and the theoretical enrichment factor reached to 125 times. Under the optimized conditions of solid-phase extraction (SPE) and GC–MS, the mass concentration of each MAHC (0.005–10, 0.01–10, or 0.05–10 ng/mL) had a fine linear relationship with peak area. The correlation coefficients were more than 0.995. The detection limits were between 0.001 and 0.01 ng/mL, and the RSD were between 3.1% and 6.6%. The method had been applied to determine the seven MAHCs in the Dongfengqu river water and laboratory wastewater of Chengdu University of Technology successfully. Keywords: Solid-phase extraction, Monoaromatic hydrocarbons, Gas chromatography–mass spectrometry, SDBS-modified layered bimetallic hydroxide |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|