Article: Determination of phenols in natural and waste waters by capillary electrophoresis after preconcentration on magnetic nanoparticles coated with aminated hypercrosslinked polystyrene
Journal of separation science. 2021 May, v. 44, no. 9
2021
Abstract: An efficient sorbent for magnetic solid‐phase extraction was developed from Fe₃O₄ nanoparticles covered with aminated hypercrosslinked polystyrene. The sorbent has a saturation magnetization of 47 emu/g and a surface area of 509 mg/g and was tested for ... ...
| Abstract | An efficient sorbent for magnetic solid‐phase extraction was developed from Fe₃O₄ nanoparticles covered with aminated hypercrosslinked polystyrene. The sorbent has a saturation magnetization of 47 emu/g and a surface area of 509 mg/g and was tested for the extraction of 11 phenols from aqueous media. The optimum conditions were as follows: pH 3; adsorbent mass, 20.0 mg; adsorption time, 30 min; eluent (acetone) volume, 0.5 mL; and desorption time, 5 min. The enrichment factor after desorption reached 1595‐1716 and the maximum adsorption capacity was 501‐909 mg/g. Capillary electrophoresis was applied successively to separate 11 phenols after solid‐phase extraction. The best separation was achieved using a fused silica capillary and borate buffer (pH 10.7) as a supporting electrolyte. After optimization, the linearity range was from 0.2 to 950 μg/L, and the limits of detection were 0.05‐0.2 μg/L. The relative standard deviation varied from 6.1 to 8.7% (C = 1 μg/L) and from 2.9 to 3.5% (C = 500 μg/L). The determination of phenols is complicated in eutrophic water and spring water with a high content of humic and fulvic acids. |
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| Keywords | acetone ; adsorbents ; adsorption ; borates ; capillary electrophoresis ; crosslinking ; desorption ; eutrophication ; magnetism ; pH ; polystyrenes ; separation ; silica ; solid phase extraction ; standard deviation ; surface area |
| Language | English |
| Dates of publication | 2021-05 |
| Size | p. 1978-1988. |
| Publishing place | John Wiley & Sons, Ltd |
| Document type | Article |
| Note | NAL-AP-2-clean ; JOURNAL ARTICLE |
| ZDB-ID | 2047990-6 |
| ISSN | 1615-9314 ; 1615-9306 |
| ISSN (online) | 1615-9314 |
| ISSN | 1615-9306 |
| DOI | 10.1002/jssc.202001177 |
| Database | NAL-Catalogue (AGRICOLA) |
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