Knowing how oil sticks
Have you ever cooked something and found out later that you can’t even wash away the grease even with dish detergent? That has to do with the fact all oil has a certain level of saturation vs unsaturation which is measured with Iodine level. The higher the Iodine level the higher the unsaturated fat content.
Without getting too much into the science, in a nutshell, the higher the Iodine value (high in unsaturated fat), the more oxidation would take place which polymerizes to cause the fatty acid in the oil to harden and becoming plastic like stickiness to your pan.
Iodine values of common cooking oils (low to high)
Coconut oil: 6 – 11
Palm kernel oil: 14 – 21
Butter: 25 – 42
Cocoa butter: 32 – 40
Palm oil: 49 -55
Lard: 52 – 68
Olive oil: 75 – 94
Pecan oil: 77 – 106
Peanut oil 82 – 107
Hazelnut oil: 83 – 90
Pistachio oil: 86 – 98
Corn oil : 107 – 128
Canola oil: 110 -126
Soybean oil : 120 – 139
Sunflower oil :110 – 145
Walnut oil : 132 – 162
Cod liver oil: 148 – 183
Linseed oil: 170 – 204
Fish oil : 190 – 205
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Reference :https://en.wikipedia.org/
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