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Abstract
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Article Information:
Experimental Layout for Investigating Temperature Dependednce of the Vibration Plane Rotation in Some Identified Mineral and Vegetable Oils
Eric Mucunguzi-Rugwebe, E.A. Hammer and Y. Kaahwa
Corresponding Author: Eric Mucunguzi-Rugwebe
Submitted: January 11, 2011
Accepted: September 25, 2011
Published: May 15, 2012 |
Abstract:
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This study presents results of a recent study done in Norway from Bergen University, to determine
temperature dependence of linear birefringence in mineral oil and linear and induced birefringence in vegetable
oils. The study was done between the temperature range of 6 and 45ºC in magnetic field up to 140 mT. It found
the intrinsic birefringences responsible for optical activity in vegetable oils with impurities and all mineral oils.
The results of optical activity in both oils obeyed the equation f = A + aw (1) where aw is the angle at which
minimum irradiance Imin occurs in water and other substances which are optically inactive. Heavy oils like red
diesel, Esso diesel and Fina diesel No. 2 rotate more the vibration plane and they possess more intrinsic
birefringences than light diesel. The research team found that the temperature effect on rotation in both mineral
and vegetable oils with impurities, yielded results that obeyed the equation f1 = A - bT (3) where b is positive.
In vegetable oils for human consumption, application of magnetic field causes induced birefringences
responsible for f given by f2 = VHL + aw (4) where V is Verdet’s constant in rad T-1m-1 and H is the magnetic
field intensity in Am-1. Also the temperature dependence on rotation in vegetable oils free from impurities
obeyed the relationship given by equation = VHL–bT (5). This method can be used to determine the level of
refinement of mineral and vegetable oils.
Key words: Birefringences, irradiance, optical activity, vegetable oils, vibration plane, ,
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Cite this Reference:
Eric Mucunguzi-Rugwebe, E.A. Hammer and Y. Kaahwa, . Experimental Layout for Investigating Temperature Dependednce of the Vibration Plane Rotation in Some Identified Mineral and Vegetable Oils. Research Journal of Applied Sciences, Engineering and Technology, (10): 1225-1229.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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