Abstract: A scheme is proposed for the rapid dynamic sorption preconcentration of volatile organic compounds in the gas chromatographic analysis of air, based on a change in the configuration of the sorption layer in a transition from the sorption to the thermal desorption of analytes. The sorption extraction of analytes is carried out in a wide sorption column, which ensures high flow rates of the analyzed air at relatively small pressure drops created by typical electric aspirators. Then the sorbent is poured into a narrow column, which ensures rapid heating and the minimal blurring of analyte zones in the thermal desorption. The analytical capabilities of the proposed scheme, which makes it possible to reduce the duration of the stage of the sorption preconcentration of analytes by a factor of 3–4, is illustrated on an example of the sorption preconcentration of methanol and phenol using carboxene 1000 and carbopak C, respectively.

Translated title of the contributionСорбционное концентрирование летучих органических соединений в анализе воздуха с изменением конфигурации сорбционного слоя при переходе от сорбции к десорбции
Original languageEnglish
Pages (from-to)707-713
Number of pages7
JournalJournal of Analytical Chemistry
Volume76
Issue number6
DOIs
StatePublished - 1 Jun 2021

    Research areas

  • air analysis, configuration of the sorption layer, preconcentration, solid-phase extraction, sorption, thermal desorption, CARBON, SAMPLING METHODS, SUBSTANCES, SOLID-PHASE EXTRACTION

    Scopus subject areas

  • Chemistry(all)
  • Analytical Chemistry

ID: 77772794