2024-03-28T21:52:27Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/263852021-06-23T11:49:14Zcom_10324_1185com_10324_931com_10324_894col_10324_1346
Magnetic solid phase extraction based on fullerene and activated carbon adsorbents for determination of azo dyes in water samples by capillary electrophoresis
Rodríguez, José Antonio
Ibarra, Israel S.
Miranda, Jose María
Barrado Esteban, Enrique
Santos, Eva M.
Capilary Electrophoresis, Magnetic Solid Phase Extraction, Azo dyes, Waste Water
A magnetic solid phase extraction method coupled to capillary electrophoresis for simultaneous determination of three azo dyes (sunset yellow, allure red and tartrazine) in wastewater samples was proposed. The method employs the dispersion of magnetic adsorbents in the sample. Variables involved in the retention+elution procedures were optimized using a simplex centroid design. Optimal conditions were: adsorbent composition magnetite+activated carbon+Fullerene (10:0.59:0.41), sample pH of 4.0, and a sample volume (Kl): weight of adsorbent (mg) ratio of 0.01. Under optimal conditions, it was obtained a linear range from 3.0+0.0 mg l+1 with limits of detection ranging from 1.0+ 2.0 mg l+1. The average recoveries of each dye at two spiked levels (10 and 25 mg l+1) ranged from 95+106% with relative standard deviations less than 10% in all cases. The proposed method was applied to analyze wastewater samples from different locations. Two samples were positive to the presence of tartrazine residues. The method proposed offers advantages in terms of simplicity, sensitivity, high efficiency, low cost, and short analysis time, making it an alternative for analysis of azo dyes in water samples and another complex matrix.
CONACYT (INFR2014-227999), Xunta de Galicia (2012/153)
2017-10-17T10:15:46Z
2017-10-17T10:15:46Z
2016
info:eu-repo/semantics/article
https://doi.org/10.1039/C6ay02631a
Analytical Methods, 8 (2016) 8466-8473
1759-9679
http://uvadoc.uva.es/handle/10324/26385
8466
8
8473
Analytical Methods
eng
Attribution-NonCommercial-NoDerivatives 4.0 International
info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Royal Society of Chemistry
application/pdf
Royal Society of Chemistry