Use of large-volume sample stacking in on-line solid-phase extraction-capillary electrophoresis for improved sensitivity

2008 ◽  
Vol 29 (6) ◽  
pp. 1339-1346 ◽  
Author(s):  
Patricia Puig ◽  
F. W. Alexander Tempels ◽  
Govert W. Somsen ◽  
Gerhardus J. de Jong ◽  
Francesc Borrull ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Large Volume ◽  
Solid Phase ◽  
Phase Extraction ◽  
Sample Stacking ◽  
On Line ◽  
Large Volume Sample Stacking

scholarly journals Solid-Phase Extraction and Large-Volume Sample Stacking-Capillary Electrophoresis for Determination of Tetracycline Residues in Milk

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Gabriela Islas ◽  
Jose A. Rodriguez ◽  
Irma Perez-Silva ◽  
Jose M. Miranda ◽  
Israel S. Ibarra
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Large Volume ◽  
Solid Phase ◽  
Phase Extraction ◽  
Sample Stacking ◽  
Milk Samples ◽  
Relative Standard ◽  
Tetracycline Residues ◽  
Large Volume Sample Stacking

Solid-phase extraction in combination with large-volume sample stacking-capillary electrophoresis (SPE-LVSS-CE) was applied to measure chlortetracycline, doxycycline, oxytetracycline, and tetracycline in milk samples. Under optimal conditions, the proposed method had a linear range of 29 to 200 µg·L−1, with limits of detection ranging from 18.6 to 23.8 µg·L−1 with inter- and intraday repeatabilities < 10% (as a relative standard deviation) in all cases. The enrichment factors obtained were from 50.33 to 70.85 for all the TCs compared with a conventional capillary zone electrophoresis (CZE). This method is adequate to analyze tetracyclines below the most restrictive established maximum residue limits. The proposed method was employed in the analysis of 15 milk samples from different brands. Two of the tested samples were positive for the presence of oxytetracycline with concentrations of 95 and 126 µg·L−1. SPE-LVSS-CE is a robust, easy, and efficient strategy for online preconcentration of tetracycline residues in complex matrices.

Solid-Phase Extraction and Large-Volume Sample Stacking-Capillary Electrophoresis for Determination of Artificial Sweeteners in Water Samples

2018 ◽  
Vol 12 (2) ◽  
pp. 526-533 ◽  
Author(s):  
Lorena Camargo Medrano ◽  
Juan Francisco Flores-Aguilar ◽  
Gabriela Islas ◽  
José Antonio Rodríguez ◽  
Israel Samuel Ibarra
Keyword(s):  
Capillary Electrophoresis ◽  
Solid Phase Extraction ◽  
Large Volume ◽  
Water Samples ◽  
Solid Phase ◽  
Artificial Sweeteners ◽  
Phase Extraction ◽  
Sample Stacking ◽  
Large Volume Sample Stacking
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