A combined application of thermal desorber and gas chromatography to the analysis of gaseous carbonyls with the aid of two internal standards

Ki Hyun Kim, A. Anthwal, Sudhir Kumar Pandey, Ehsanul Kabir, Jong Ryeul Sohn

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, a series of GC calibration experiments were conducted to examine the feasibility of the thermal desorption approach for the quantification of five carbonyl compounds (acetaldehyde, propionaldehyde, butyraldehyde, isovaleraldehyde, and valeraldehyde) in conjunction with two internal standard compounds. The gaseous working standards of carbonyls were calibrated with the aid of thermal desorption as a function of standard concentration and of loading volume. The detection properties were then compared against two types of external calibration data sets derived by fixed standard volume and fixed standard concentration approach. According to this comparison, the fixed standard volume-based calibration of carbonyls should be more sensitive and reliable than its fixed standard concentration counterpart. Moreover, the use of internal standard can improve the analytical reliability of aromatics and some carbonyls to a considerable extent. Our preliminary test on real samples, however, indicates that the performance of internal calibration, when tested using samples of varying dilution ranges, can be moderately different from that derivable from standard gases. It thus suggests that the reliability of calibration approaches should be examined carefully with the considerations on the interactive relationships between the compound-specific properties and the operation conditions of the instrumental setups.

Original languageEnglish
Pages (from-to)3354-3364
Number of pages11
JournalJournal of Separation Science
Volume33
Issue number21
DOIs
Publication statusPublished - 2010 Nov

Keywords

  • External calibration
  • Gas chromatography
  • Internal calibration
  • Odorants
  • Thermal desorption

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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