Quantitative determination of fatty acid compositions in micro-encapsulated fish-oil supplements using Fourier transform infrared (FTIR) spectroscopy

Jitraporn Vongsvivut, Philip Robert Heraud, Wei Zhang, Jaroslav A Kralovec, Donald McNaughton, Colin J Barrow

Research output: Contribution to journalArticleResearchpeer-review

79 Citations (Scopus)


The research describes a rapid method for the determination of fatty acid (FA) contents in a micro-encapsulated fish-oil (mu EFO) supplement by using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopic technique and partial least square regression (PLSR) analysis. Using the ATR-FTIR technique, the mu EFO powder samples can be directly analysed without any pre-treatment required, and our developed PLSR strategic approach based on the acquired spectral data led to production of a good linear calibration with R-2 = 0.99. In addition, the subsequent predictions acquired from an independent validation set for the target FA compositions (i.e., total oil, total omega-3 fatty acids, EPA and DHA) were highly accurate when compared to the actual values obtained from standard GC-based technique, with plots between predicted versus actual values resulting in excellent linear fitting (R-2 >= 0.96) in all cases. The study therefore demonstrated not only the substantial advantage of the ATR-FTIR technique in terms of rapidness and cost effectiveness, but also its potential application as a rapid, potentially automated, online monitoring technique for the routine analysis of FA composition in industrial processes when used together with the multivariate data analysis modelling.
Original languageEnglish
Pages (from-to)603 - 609
Number of pages7
JournalFood Chemistry
Issue number2
Publication statusPublished - 2012

Cite this