Changes in physical and chemical properties of palm olein during heating

Aly H. Rady; Mohamed A. Madkour

doi:10.3989/gya.1995.v46.i4-5.936

Changes in physical and chemical properties of palm olein during heating

Authors

Aly H. Rady Radiobiology Department, Nuclear Res. Center, Atomic Energy
Mohamed A. Madkour Misr Gulf Oil Processing Co, Cairo

DOI:

https://doi.org/10.3989/gya.1995.v46.i4-5.936

Keywords:

Chemical properties, Heating, Palm olein, Physical properties

Abstract

This study evaluated some changes occurring in double fractionated (DF) palm olein during heating. DF palm olein was heated at 180°C for 60 hr (4hr/day) with no added source of water. Heated oil samples were analyzed for refractive index (Rl), viscosity, colour change, dielectric constant change (DCC), acid value (AV), peroxide value (PV), iodine value (IV) and unsaponifiable matter (UM) constituents. The results indicated that, viscosity, colour, DCC and AV gradually increased, while IV gradually decreased with increasing heating time. The study showed also that heating times correlated with increases in DCC, viscosity and AV. PV increased ca 17-fold, reached a maximum at 16 hr, then gradually decreased to remain relatively constant through the last 20 hr of heating. Chromatographic analysis illustrated that UM components changed qualitatively and quantitatively due to the heating treatment.

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Published

1995-10-30

How to Cite

Rady AH, Madkour MA. Changes in physical and chemical properties of palm olein during heating. Grasas aceites [Internet]. 1995Oct.30 [cited 2024Apr.27];46(4-5):270-5. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/936

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Issue

Vol. 46 No. 4-5 (1995)

Section

Research

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