title: Anomalies of temperature dependence of gaschromatographic retention indices (review of literature)
metadata.name: dc.contributor.author
metadata.value: Pavlovskii, A. A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Zenkevich, I. G.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2017-10-28T15:17:15Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2017-10-28T15:17:15Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2017-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: PavlovskiiA.A., Zenkevich I. G. Anomalies of temperature dependence of gaschromatographic retention indices (review of literature). Vestnik SPbSU. Physics and Chemistry. 2017. Vol. 4 (62), iss. 3. P. 278–312.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: 10.21638/11701/spbu04.2017.305
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/8629
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The influence of temperature (T) of gas chromatographic separation on variations of isothermal
  retention indices (RI) and the possibility of using temperature coefficients of retention indices
  β = dRI/dT for identification of analytes is considered in the review. Features of linear and
  nonlinear approximations of RI(T) dependencies is considered on the example of compounds of
  different chemical origin and stationary phases of different polarities. Of special interest are
  the anomalous dependences of RI(T) with extrema which are observed for some polar analytes
  on nonpolar phases. This anomaly, first discovered in 1990s — beginning of 2000s, implies the
  variations in the signs of temperature coefficients β which leads to appearance of minima or
  maxima on the plots of the RI(T) dependences. Concepts of the entropy index, first and second
  derivatives of the retention indices proposed to explain the anomalies of dependencies RI(T)
  are discussed. Despite general acceptance for a long time that only the chemical nature of the
  analyte and the type of stationary phase determine the character of the RI(T) dependence, effect
  of injected amount of polar analyte on the character of RI(T) dependences was recently revealed.
  It is shown that these anomalous temperature effects are caused by the dynamic modification of
  nonpolar phase by polar analyte. Refs 125. Figs 6.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Physics and Chemistry;Vol. 4 (62); Issue 3
metadata.lang: -
metadata.name: dc.subject
metadata.value: gas chromatography
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: polar analytes
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: non-polar stationary phases
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: gas chromatographic retention indices
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: anomalous temperature dependence of retention indices
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: dynamic modification of stationary phase by analytes
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Anomalies of temperature dependence of gaschromatographic retention indices (review of literature)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 05-Pavlovsky.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/8629/1/05-Pavlovsky.pdf
resources.format: Adobe PDF
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