Analysis of Six β-Lactam Residues in Milk and Egg by Micellar Electrokinetic Chromatography with Large-Volume Sample Stacking and Polarity Switching

2016 ◽  
Vol 64 (17) ◽  
pp. 3456-3461 ◽  
Author(s):  
Yu-Xiu Shao ◽  
Guan-Hua Chen ◽  
Rou Fang ◽  
Li Zhang ◽  
Ling-Xiao Yi ◽  
...  
Keyword(s):  
Large Volume ◽  
Micellar Electrokinetic Chromatography ◽  
Electrokinetic Chromatography ◽  
Sample Stacking ◽  
Polarity Switching ◽  
Large Volume Sample Stacking

scholarly journals Simultaneous Separation and Analysis of Five Compounds in Cibotium barometz by Micellar Electrokinetic Chromatography with Large-Volume Sample Stacking

Separations ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 147
Author(s):  
Lili Wang ◽  
Huifeng Xu ◽  
Lishuang Yu ◽  
Zaishi Zhu ◽  
Hongzhi Ye ◽  
...  
Keyword(s):  
Caffeic Acid ◽  
Large Volume ◽  
Micellar Electrokinetic Chromatography ◽  
Protocatechuic Acid ◽  
Array Detector ◽  
Dihydrogen Phosphate ◽  
Electrokinetic Chromatography ◽  
Sample Stacking ◽  
Simultaneous Separation ◽  
Large Volume Sample Stacking

A large volume sample stacking (LVSS) method in micellar electrokinetic chromatography (MEKC) with diode array detector was developed for the simultaneous separation and analysis of five compounds: protocatechuic acid, protocatechuic aldehyde, caffeic acid, syringetin and vanillin in Cibotium barometz. The electrophoretic separation was performed in a 10 mM sodium dodecyl sulfate (SDS) and 50 mM sodium borax-sodium dihydrogen phosphate system (pH = 8.5) with 10% methanol at a separation voltage of 30 kV after optimizing the typical parameters. The detection limits were from 32 pg to 65 pg, which were around 12–27 times lower than MEKC, and 500 times less than reported methods. Finally, the established method was validated to be applicable for the determination of protocatechuic acid and caffeic acid in Cibotium barometz. This proposed method is expected to facilitate the quality control of Cibotium barometz.

On-line preconcentration and determination of six sulfonylurea herbicides in cereals by MEKC with large-volume sample stacking and polarity switching

2013 ◽  
Vol 34 (9-10) ◽  
pp. 1304-1311 ◽  
Author(s):  
Ling-Xiao Yi ◽  
Guan-Hua Chen ◽  
Rou Fang ◽  
Li Zhang ◽  
Yu-Xiu Shao ◽  
...  
Keyword(s):  
Large Volume ◽  
Sulfonylurea Herbicides ◽  
Sample Stacking ◽  
Polarity Switching ◽  
On Line ◽  
Large Volume Sample Stacking
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