Analysis of spectral identifier of fatty acid functional group of packaging frying oil and bulk frying oil with the effect of repeated heating using FTIR (Fourier Transform InfraRed) spectroscopy

Vinda Dwi Dini Putri, Aulia M.T. Nasution

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Frying oil is a cooking medium that is commonly used in Indonesia. Frying process can lead changes in the properties of frying oil. Heating oil with high temperature and many repetition will cause degradation in oil and may cause health problems, such as cholesterol, induces heart disease, and cancer. Degradation of the frying oil can be determined based on changes in the cluster function of fatty acids due to the heating influence. Therefore, it is necessary to test the frying oil under treatments with variety of time heating using a spectrometer Fourier Transform Infrared (FTIR). Spectra from FTIR was processed using derivative spectroscopy method to clearly see the difference in the measured spectra. Range spectra of interest is at wavelength of 13,500 to 14,200 nm i.e. indicating the double bond of carbon in molecule HC = CH. The analysis was performed by calculating the area of the spectral curve from the respected 2nd order derivative. Result show that the absorbance of packaging frying oil is higher than the bulk frying oil. In addition, heating of frying oil can decrease the area of respected 2nd order derivative. Packaging frying oil heating on 30 minutes which has the area of spectral curve of 0.904217 decrease become 0.881394 after 3 times heating. While the bulk frying oil heating 30 minutes, in the first heating which has area of spectral curve of 0.916089 decrease become 0.865379 after 3 times heating. The decline in the area of the curve occurs due to breakdown of the double bond of carbon in the molecule HC = CH that caused by heating at high temperatures and repeated heating.

Original languageEnglish
Title of host publicationSecond International Seminar on Photonics, Optics, and Its Applications, ISPhOA 2016
EditorsAgus Muhamad Hatta, Aulia M.T. Nasution
PublisherSPIE
ISBN (Electronic)9781510607514
DOIs
Publication statusPublished - 2016
Event2nd International Seminar on Photonics, Optics, and Its Applications, ISPhOA 2016 - Legian - Kuta, Bali, Indonesia
Duration: 24 Aug 201625 Aug 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10150
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2nd International Seminar on Photonics, Optics, and Its Applications, ISPhOA 2016
Country/TerritoryIndonesia
CityLegian - Kuta, Bali
Period24/08/1625/08/16

Keywords

  • Derivative spectroscopy
  • Fourier Transform Infra-Red Spectroscopy
  • Frying oil
  • Repeated heating

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