Determination of free fatty acids in cooking oil: traditional spectrophotometry and optothermal window assay

M. Goyrik, Z. Ajtony, O. Doka, A. Alebic-Juretic, D.D. Bicanic, A. Koudijs

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)


The concept of optothermal window (OW) (with 632.8 nm He-Ne laser used as a radiation source), combined with copper soap based colorimetry, was proposed as a new analytical tool to determine total free fatty acid (FFA) content in thermally treated cooking oil. The results obtained were compared to those acquired by conventional spectroscopy; the correlation between the two methods is high for FFA concentrations exceeding 2 µmol/mL
Original languageEnglish
Pages (from-to)119-128
JournalInstrumentation Science and Technology
Issue number1-2
Publication statusPublished - 2006



  • transform infrared-spectroscopy
  • olive oil
  • lipase
  • extraction

Cite this