umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects of temperature and flow regulated carbon dioxide cooling in longitudinally modulated cryogenic systems for comprehensive two-dimensional gas chromatography
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
2002 (English)In: Journal of Chromatography A, Vol. 962, no 1-2, 127-34 p.Article in journal (Refereed) Published
Abstract [en]

Two different modes of temperature regulation in longitudinally modulated cryogenic systems (LMCSs) for comprehensive two-dimensional gas chromatography (GC×GC) were compared. Carbon dioxide was used as coolant. In the first mode of operation, the temperature of the trap was regulated to a pre-set temperature using a digital temperature controller (“the constant temperature mode”). In the second, the temperature was regulated to a fixed negative offset to the oven temperature by using a constant flow of CO2 (“the constant flow mode”). A number of problems were occasionally observed using the constant temperature mode: (1) severe band broadening of high boiling analytes in the second dimension; (2) non-Gaussian reconstructed first-dimension peak profiles; (3) high background due to modulation of first-dimension column bleed. It was concluded that these problems were associated with inefficient solute remobilization at low LMCS trap temperatures (1 and 2) or large trap temperature fluctuations (3). These problems could be avoided or significantly reduced by using the constant flow mode. Best results were obtained as the trap temperature was kept about 70 °C below the oven temperature.

Place, publisher, year, edition, pages
2002. Vol. 962, no 1-2, 127-34 p.
Keyword [en]
Polychlorinated biphenyls
Identifiers
URN: urn:nbn:se:umu:diva-8832DOI: doi:10.1016/S0021-9673(02)00433-8OAI: oai:DiVA.org:umu-8832DiVA: diva2:148503
Available from: 2008-02-18 Created: 2008-02-18 Last updated: 2011-01-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Haglund, PeterDanielsson, Conny

Search in DiVA

By author/editor
Haglund, PeterDanielsson, Conny
By organisation
Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 63 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf