Please Note:

The Library Open Repository will be moving to a new authentication system on the 1st of November.

From this date onwards, account holders will be required to login using their University of Tasmania credentials.
If your current repository username differs from your University username, please email E.Prints@utas.edu.au so we can update these details on your behalf.

Due to the change, there will be a short outage of the repository from 9am on the morning of the 1st of November

Library Open Repository

On-line concentration of neutral analytes for micellar electrokinetic chromatography IV. Field-enhanced sample injection

Downloads

Downloads per month over past year

Quirino, JP and Terabe, S (1998) On-line concentration of neutral analytes for micellar electrokinetic chromatography IV. Field-enhanced sample injection. Journal of Chromatography A, 798 (1-2). pp. 251-257. ISSN 0021-9673

[img] PDF
004.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

Fundamental conditions for the on-line concentration of neutral analytes by field-enhanced sample injection (FESI) for micellar electrokinetic chromatography (MEKC) is presented. Long water plugs are injected into the capillary to effect an enhanced field during electrokinetic injection of samples at negative polarity. Optimization of the injection procedure is performed by modifying the composition of the micellar sample matrix containing one anionic surfactant. Stacking is found to be dependent on analyte retention factors and the nature of the pseudostationary phase. More than 20- and 100-fold improvements in peak height and peak area were confirmed experimentally. The applicability of the technique was tested using spiked urine samples following a simple liquid–liquid extraction step.

Item Type: Article
Keywords: Resorcinol; Naphthols; Dihydroxynaphthalene; Estrogens; Steroids; Injection methods; Micellar electrokinetic chromatography; Sample stacking; Sample handling; Field-enhanced sample injection; Electrokinetic injection
Journal or Publication Title: Journal of Chromatography A
Page Range: pp. 251-257
ISSN: 0021-9673
Identification Number - DOI: 10.1016/S0021-9673(97)01209-0
Additional Information:

The definitive version is available at http://www.sciencedirect.com

Date Deposited: 30 Jun 2008 22:50
Last Modified: 18 Nov 2014 03:44
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP