| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1166394 | Analytica Chimica Acta | 2011 | 5 Pages |
In this paper, a graphene-based Fe3O4 magnetic nanoparticles (G-Fe3O4 MNPs) was used as the adsorbent for the magnetic solid-phase extraction of some triazine herbicides (atrazine, prometon, propazine and prometryn) in environmental water samples followed by high performance liquid chromatography-diode array detection (HPLC-DAD). After the extraction, the adsorbent can be conveniently separated from the aqueous samples by an external magnet. The main factors influencing the extraction efficiency including the amount of the MNPs, the extraction time, the pH of sample solution, and desorption conditions were studied and optimized. Under the optimized experimental conditions, a good linearity was observed in the range of 0.1–50.0 ng mL−1 for all the analytes, with the correlation coefficients (r) ranging from 0.9996 to 0.9999. The limits of detection of the method ranged between 0.025 and 0.040 ng mL−1. Good reproducibility was obtained with the relative standard deviations below 5.2%. The developed method was applied to the analysis of the triazine herbicides in different water samples (lake, river and reservoir). The recoveries of the method were in the range between 89.0% and 96.2%.
Graphical abstractEffect of the amount of the magnetic nanoparticles (NPs) on the peak area of the triazines. Extraction conditions: sample volume, 250 mL; extraction time, 30 min; sample pH, 6.2; desorption solvent, 0.5 mL acetone; concentration of analytes, 5 ng mL−1.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A graphene-coated Fe3O4 magnetic nanoparticles (G-Fe3O4 MNPs) was used for the extraction of triazines from water samples. ► The extraction conditions by the G-Fe3O4 MNPs were investigated. ► The G-Fe3O4 MNPs proved to be an effective adsorbent.
