| Characterization of PEG in monomethyl ethers of PEG by 2-D LC. | |
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MedLine Citation:
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PMID: 20235138 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PEGs present in samples of the corresponding monomethyl ethers are analyzed by 2-D LC with LC at critical conditions as the first and liquid adsorption chromatography as the second dimension. The fractions from the first dimension are transferred to the second one by heart-cutting using a ten-port valve. The efficiency of the separation is dramatically improved by adding water to the eluate from the first dimension before the switching valve in order to have a weaker eluent in the fraction than that of the second dimension. By this procedure, the fractions are focussed and reconcentrated. The molar mass distribution of the PEG fraction can be determined with good accuracy even at very low amounts of PEG in the PEG-monomethyl ethers (down to 0.5%). |
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Authors:
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Hasnat Ahmed; Bernd Trathnigg |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of separation science Volume: 33 ISSN: 1615-9314 ISO Abbreviation: J Sep Sci Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-05-25 Completed Date: 2010-09-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088554 Medline TA: J Sep Sci Country: Germany |
Other Details:
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Languages: eng Pagination: 1448-53 Citation Subset: IM |
Affiliation:
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NAWI Graz, Central Polymer Laboratories (CePoL), Institute of Chemistry, Karl-Franzens-University, Graz, Austria. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Chromatography, Liquid
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methods* Methyl Ethers / chemistry* Polyethylene Glycols / analysis*, chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Methyl Ethers; 0/Polyethylene Glycols |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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