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Comparative evaluation of palm oil color measurement using a prototype palm oil colorimeter
Author(s) -
Tan YewAi,
Kuntom Ainie,
Lee Chak Khiam,
Low Kum Sang
Publication year - 2004
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-004-0970-z
Subject(s) - colorimeter , palm oil , repeatability , palm , color measurement , colorimetry , color difference , mathematics , artificial intelligence , computer science , computer vision , statistics , food science , chemistry , optics , enhanced data rates for gsm evolution , physics , quantum mechanics
The color of refined palm oil and palm oil products is conventionally measured using the manually operated Lovibond ® Tintometer. In the present study, one manual/visual and three automatic colorimeters for the measurement of vegetable oil color were used for color measurements of refined palm oil. All colorimeters used were commercially available instruments except for an automatic palm oil colorimeter developed specifically for the measurement of palm oil color. The color values obtained from all four instruments were compared using the visually obtained readings as reference values. Results showed that all three automatic instruments gave correlation coefficients of greater than 0.9300 for red color measurements. In addition, the Student t ‐test showed no difference between the analysis of red color using the visual method and the palm oil colorimeter. This investigation concludes that, although it is extremely difficult to reduce the lack of precision in color measurement of palm oil, a properly designed and calibrated automatic instrument may still be the better choice because reproducibility and repeatability are required in all standard test methods. The palm oil colorimeter offers a ready and relatively inexpensive solution to the problem of color matches based on visual observations.