Oil Polarity Assay Kit
The Oil Polarity Assay Kit is For Research Use Only
Sample Type: Frying oil or shortening
Sample Size: 5.0 mL
Assay Background
Frying oil can go rancid due to many factors, including overheating, prolonged use and contamination from foods. There are many tests available to measure the degradation of cooking oils such as total polar materials, pH, viscosity, fatty acid composition and others described by the American Oil Chemists’ Society. Several instruments are available to provide these results on a timely basis as well as dipstick assays which give qualitative results. This kit is designed to quickly measure the change in polarity of a cooking oil due to oxidation hydrolysis from heating. It is based on the properties of a merocyanine dye that undergoes a significant color-change when dissolved in solvents with differing polarities. The dye is dissolved in an oil-miscible solvent which then allows the polar components of the oil to interact with the dye, changing its color accordingly.
Technical Note:
There are many different types of oil, each with their own distinct properties. Variations due to different cultivars and also batch-to-batch inconsistencies may give different readings. It should be noted that the amount of Indicator Solution is only for a specific batch and type of oil, and may not correlate to other lots of the same material.
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