Analytical and Bioanalytical Chemistry

, Volume 409, Issue 11, pp 2777–2789 | Cite as

Gibbs energy additivity approaches to QSRR in generating gas chromatographic retention time for identification of fatty acid methyl ester

  • Siriluck Pojjanapornpun
  • Kornkanok Aryusuk
  • Supathra Lilitchan
  • Kanit Krisnangkura
Research Paper


The Gibbs energy additivity method was used to correlate the retention time (tR) of common fatty acid methyl esters (FAMEs) to their chemical structures. The tR of 20 standard FAMEs eluted from three capillary columns of different polarities (ZB-WAXplus, BPX70, and SLB-IL111) under both isothermal gas chromatography and temperature-programmed gas chromatography (TPGC) conditions were accurately predicted. Also, the predicted tR of FAMEs prepared from flowering pak choi seed oil obtained by multistep TPGC with the BPX70 column were within 1.0% of the experimental tR. The predicted tR or mathematical tR (tR(math)) values could possibly be used as references in identification of common FAMEs. Hence, FAMEs prepared from horse mussel and fish oil capsules were chromatographed on the BPX70 and ZB-WAXplus columns in single-step and multistep TPGC. Identification was done by comparison of tR with the tR of standard FAMEs and with tR(math). Both showed correct identifications. The proposed model has six numeric constants. Five of six could be directly transferred to other columns of the same stationary phase. The first numeric constant (a), which contained the column phase ratio, could also be transferred with the adjustment of the column phase ratio to the actual phase ratio of the transferred column. Additionally, the numeric constants could be transferred across laboratories, with similar correction of the first numeric constant. The TPGC tR predicted with the transferred column constants were in good agreement with the reported experimental tR of FAMEs. Moreover, hexane was used in place of the conventional tM marker in the calculation. Hence, the experimental methods were much simplified and practically feasible. The proposed method for using tR(math) as the references would provide an alternative to the uses of real FAMEs as the references. It is simple and rapid and with good accuracy compared with the use of experimental tR as references.


Fatty acid methyl ester Gibbs energy Identification Quantitative structure–retention relationship Retention time 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Siriluck Pojjanapornpun
    • 1
  • Kornkanok Aryusuk
    • 1
  • Supathra Lilitchan
    • 2
  • Kanit Krisnangkura
    • 1
  1. 1.Division of Biochemical Technology, School of Bioresources and TechnologyKing Mongkut’s University of Technology Thonburi (Bangkhuntien)BangkokThailand
  2. 2.Department of Nutrition, Faculty of Public HealthMahidol UniversityBangkokThailand

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