Validation of CE modeling with a contactless conductivity array detector

Caslavsky, Jitka; Koenka, Israel Joel; Hauser, Peter C; Thormann, Wolfgang (2016). Validation of CE modeling with a contactless conductivity array detector. Electrophoresis, 37(5-6), pp. 699-710. Wiley-VCH 10.1002/elps.201500424

[img] Text
wt244 simulation validation with array detector.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (669kB) | Request a copy

Dynamic computer simulation data are compared for the first time with CE data obtained with a laboratory made system comprising an array of 8 contactless conductivity detectors (C(4) Ds). The experimental setup featured a 50 μm id linear polyacrylamide (LPA) coated fused-silica capillary of 70 cm length and a purpose built sequential injection analysis manifold for fluid handling of continuous or discontinuous buffer configurations and sample injection. The LPA coated capillary exhibits a low EOF and the manifold allows the placement of the first detector at about 2.7 cm from the sample inlet. Agreement of simulated electropherograms with experimental data was obtained for the migration and separation of cationic and anionic analyte and system zones in CZE configurations in which EOF and other column properties are constant. For configurations with discontinuous buffer systems, including ITP, experimental data obtained with the array detector revealed that the EOF is not constant. Comparison of simulation and experimental data of ITP systems provided the insight that the EOF can be estimated with an ionic strength dependent model similar to that previously used to describe EOF in fused-silica capillaries dynamically double coated with Polybrene and poly(vinylsulfonate). For the LPA coated capillaries, the electroosmotic mobility was determined to be 17-fold smaller compared to the case with the charged double coating. Simulation and array detection provide means for quickly investigating electrophoretic transport and separation properties. Without realistic input parameters, modeling alone is not providing data that match CE results.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute for Infectious Diseases > Laboratory for Clinical Pharmacology

UniBE Contributor:

Caslavsky, Jitka and Thormann, Wolfgang

ISSN:

0173-0835

Publisher:

Wiley-VCH

Language:

English

Submitter:

Wolfgang Thormann

Date Deposited:

14 Mar 2017 15:58

Last Modified:

14 Mar 2017 15:58

Publisher DOI:

10.1002/elps.201500424

PubMed ID:

26799858

Uncontrolled Keywords:

Array detector; Capillary electrophoresis; Computer simulation; Electroosmosis; LPA coated capillary

BORIS DOI:

10.7892/boris.93149

URI:

https://boris.unibe.ch/id/eprint/93149

Actions (login required)

Edit item Edit item
Provide Feedback