Capillary electrophoresis sample stacking

Huang, H.Y. et al.. Analysis of food colorants by capillary electrophoresis with large-volume sample stacking, J. Chromatogr. A, 995, 29, 2003. 

He Y. and Lee H.K., Large-volume sample stacking in acidic buffer for analysis of small organic and inorganic anions by capillary electrophoresis, Anal. Chem. 71, 995, 1999. 

QUIRINO, J.P., TERABE, S., Sample stacking of fast-moving anions in capillary zone electrophoresis, J. Chromatogr., A., 1999, 850, 339-344. 

J.P Quirino and S. Terabe, Sample stacking of cationic and anionic analytes in capillary electrophoresis. J. Chromatogr.A 902 (2000) 119-135. 

Kfivankova, L., Caslavska, J., Malaskova, H., Gebauer, P., and Thormann, W. (2004). Analysis of ethyl glucuronide in human serum by capillary electrophoresis with sample self-stacking and indirect detection./. Chromatogr. A 1081, 2 — 8. 

Pai, Y. E, Chun-Chi Lin, C. C., and Liu, C. Y. (2004). Optimization of sample stacking for the simultaneous determination of nonsteroidal anti-inflammatory drugs with a wall-coated histidine capillary column. Electrophoresis 25, 569—577. 

Chen, Y. R., Tseng, M. C., Chang, Y. Z., and Her, G. R. (2003). A low-flow CE/electrospray ionization MS interface for capillary zone electrophoresis, large-volume sample stacking, and micellar electroklnetlc chromatography. Anal. Chem. 75, 503 — 508. 

Figure 26-26 Lower trace Sample injected electrokinetically for 2 s without stacking is limited in volume to prevent band broadening. Upper trace With stacking. 15 times more sample could be injected (for 30 s). so the signal is 15 times stronger with no increase in bandwidth. [From V Zhao and C. f. Lurie, pH-Mediated Field Amplification OmCotumn Preconcentration of Anions in Physiological Samples for Capillary Electrophoresis, Anal. Chem. 1999, 71,3985.]...

H.H. Yeh, Y.H. Yang, J.Y. Ko, S.H. Chen, Sensitive analysis of donepezil in plasma by capillary electrophoresis combining on-column field-amplified sample stacking and its application in Alzheimer s disease, Electrophoresis 29 (2008) 3649-3657. 

The early phase of development can be characterized by a transfer of concepts from conventional CE to the planar format, such as capillary gel electrophoresis, micellar electrokinetic chromatography, sample stacking and pre- and postcolumn sample derivatization. Emphasis was laid on the demonstration of the specific advantages mainly from the separation science point of view. With only very few exceptions, detection has received much less attention yet. LIF detection with confocal imaging has been used in most of the early work owing to its high sensitivity and its relatively easy implementation. If not explicitly mentioned otherwise, all experiments described in the following sections were carried out with LIF detection [28,29]. 

Lichtenberg, J., Verpoorte, E., de Rooij, N.F., Sample preconcentration by field amplification stacking for microchip-based capillary electrophoresis. Electrophoresis 2001, 22(2), 258-271. 

The separation performance and sensitivity of a capillary electrophoresis system coupled to a phosphorous-specific flame photometric detector (FPD) has been reported for the detection of alkylphosphonic acids l20 221. The liquid junction used to decouple the electric field from the FPD showed a negligible influence on the performance of the system as compared with online UV detection. The use of an on-column sample stacking preconcentration technique allowed for injection of 900 nL. With the large injection, the detection limits for the alkylphosphonic acids in water were 0.1-0.5 xgmL 1. 

Wey AB, Zhang C-X, Thormann W. Head-column field-amplified sample stacking in binary system capillary electrophoresis. Preparation of extract for determination of opioids in microliter amounts of body fluids. J Chromatogr A 1999 853 95. 

Burgi D, Chien R-L. Optimization in sample stacking for high-performance capillary electrophoresis. Anal Chem 1991 63 2042. 

Chen, Z.L., Lin, J.-M., Naidu, R. Separation of arsenic species by capillary electrophoresis with sample-stacking techniques. Anal. Bioanal. Chem. 375, 679-684 (2003)... 

Palmarsdottir S, Mathiasson L, Jonsson JA, and Edholm L-E. Determination of a basic drug, bambuterol, in human plasma by capillary electrophoresis using double stacking for large volume injection and supported liquid membranes for sample pretreatment. J. Chromatogr. B 1997 688 127-134. 

Sample Preparation and Stacking for Capillary Electrophoresis Zak K. Shihabi... 

Z. K. Shihabi, Sample stacking by acetonitrile-salt mix-tnres, J. Capillary Electrophoresis 2 267-271 (1995). 

NJ Munro, J Palmer, AM Stalcup, JP Landers. Charged cyclodextrin-mediated sample stacking in micellar capillary electrophoresis. A simple method for enhancing the detection sensitivity of hydrophobic compounds. J Chromatogr B 731 369-381, 1999. 

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