Molecularly imprinted CEC sorbents: investigations into polymer preparation and electrolyte composition.
(2002) In Analyst 127(1). p.22-28- Abstract
- The influence of the sorbent preparation protocol and separation parameters on the selectivity and chromatographic efficiency of super-porous molecularly imprinted polymer (MIP) monoliths in capillary electrochromatography (CEC) was studied. Chiral templates were employed and enantiomer separation and resolution were used as measures of imprint selectivity and column efficiency, respectively; the latter was in addition studied by chromatography of non-related aromatic structures. The polymer preparation was varied with respect to monomer composition in the pre-polymerisation mixture and also the use of single versus multiple template(s). The separation parameters investigated were type and content of organic solvent and surfactant modifier... (More)
- The influence of the sorbent preparation protocol and separation parameters on the selectivity and chromatographic efficiency of super-porous molecularly imprinted polymer (MIP) monoliths in capillary electrochromatography (CEC) was studied. Chiral templates were employed and enantiomer separation and resolution were used as measures of imprint selectivity and column efficiency, respectively; the latter was in addition studied by chromatography of non-related aromatic structures. The polymer preparation was varied with respect to monomer composition in the pre-polymerisation mixture and also the use of single versus multiple template(s). The separation parameters investigated were type and content of organic solvent and surfactant modifier in the electrolyte. It was found that acetone and acetonitrile in buffer mixtures provided enantiomer separation of enantiomers of the template and also structural analogues; however, the degree of separation was greatly influenced by the content in the electrolyte. Three surfactants, sodium dodecylsulfate (SDS), cetyltrimethylammonium bromide (CTAB) and polyoxyethylene sorbitanmonolaurate (Tween 20), were examined as electrolyte modifiers. It was found that addition of SDS decreased and CTAB and Tween 20 increased the enantiomer separation. SDS and CTAB could be used up to 1 mM concentration whereas Tween could be used up to 90 mM concentration without causing baseline disturbances. The effects found and demonstrated strongly suggest that these parameters are to be considered during optimisation of an MIP-CEC system. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/106196
- author
- Schweitz, Leif LU ; Andersson, Lars I LU and Nilsson, Staffan LU
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Analyst
- volume
- 127
- issue
- 1
- pages
- 22 - 28
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000173475200007
- pmid:11827391
- scopus:0036141893
- ISSN
- 1364-5528
- DOI
- 10.1039/b105104k
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004), Department of History (015002000)
- id
- 462f0fb2-6b85-46a6-bfff-9b5a9cdbf8ff (old id 106196)
- date added to LUP
- 2016-04-01 17:04:28
- date last changed
- 2022-01-29 00:11:55
@article{462f0fb2-6b85-46a6-bfff-9b5a9cdbf8ff,
abstract = {{The influence of the sorbent preparation protocol and separation parameters on the selectivity and chromatographic efficiency of super-porous molecularly imprinted polymer (MIP) monoliths in capillary electrochromatography (CEC) was studied. Chiral templates were employed and enantiomer separation and resolution were used as measures of imprint selectivity and column efficiency, respectively; the latter was in addition studied by chromatography of non-related aromatic structures. The polymer preparation was varied with respect to monomer composition in the pre-polymerisation mixture and also the use of single versus multiple template(s). The separation parameters investigated were type and content of organic solvent and surfactant modifier in the electrolyte. It was found that acetone and acetonitrile in buffer mixtures provided enantiomer separation of enantiomers of the template and also structural analogues; however, the degree of separation was greatly influenced by the content in the electrolyte. Three surfactants, sodium dodecylsulfate (SDS), cetyltrimethylammonium bromide (CTAB) and polyoxyethylene sorbitanmonolaurate (Tween 20), were examined as electrolyte modifiers. It was found that addition of SDS decreased and CTAB and Tween 20 increased the enantiomer separation. SDS and CTAB could be used up to 1 mM concentration whereas Tween could be used up to 90 mM concentration without causing baseline disturbances. The effects found and demonstrated strongly suggest that these parameters are to be considered during optimisation of an MIP-CEC system.}},
author = {{Schweitz, Leif and Andersson, Lars I and Nilsson, Staffan}},
issn = {{1364-5528}},
language = {{eng}},
number = {{1}},
pages = {{22--28}},
publisher = {{Royal Society of Chemistry}},
series = {{Analyst}},
title = {{Molecularly imprinted CEC sorbents: investigations into polymer preparation and electrolyte composition.}},
url = {{http://dx.doi.org/10.1039/b105104k}},
doi = {{10.1039/b105104k}},
volume = {{127}},
year = {{2002}},
}