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Oxidative and physicochemical stability of shower oils in storage tests

Key words:

oxidative and physicochemical stability of shower
oils, peroxide value, natural and synthetic

The effect of commercial tocopherol (Tocomix L50-IP), used at the concentrations of 0.04
and 0.2%, and 0.025% BHT, on the physicochemical and oxidative stability of shower oils
containing 40% of glycine soja oil was studied. Shower oils were stored at -5°C, 25°C and
40oC for 6 months. The physicochemical stability was monitored by the visual assessment and
density determination. The oxidative stability was monitored by the determination of peroxide
value. The protective effect of Tocomix L50-IP and BHT on oxidative stability of shower oils
was expressed as the Protection Factor (PF). It was observed that Tocomix L50-IP at higher
concentration 0.2% was better antioxidant than BHT and 0.04% Tocomix L50-IP in all storage
conditions. No physicochemical changes (except color) were observed in shower oils
containing 0.04% and 0.2% Tocomix L50-IP in relation to the control sample in any storage
conditions. Shower oils containing tocopherol remained clear, homogeneous oils, without
mechanical impurities for whole test. In shower oils containing 0.025% BHT the slight
sediment appeared on the bottom of the bottles after 60 days of storage only at temperature of
-5°C. The storage conditions found out to have influence the color of shower oils at 25°C and
40oC. The darkening of the color of shower oils was observed at 25°C and 40°C in samples
containing Tocomix L50-IP at both concentrations and 0.025% BHT. No major changes in density of all shower oils were observed. Altogether, the results obtained revealed that
Tocomix L50-IP can be used at the concentrations recommended by their producers as natural
antioxidant instead of synthetic BHT.

dr inż. Paulina MALINOWSKA
Poznan University of Economics and Business
Faculty of Commodity Science
Department of Technology and Instrumental Analysis
Al. Niepodległości 10, 61-875 Poznań, Poland
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

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