What Is The Factors That Influencing Oil Rancidity
The Oil Rancidity is the triglyceride molecule containing fatty acids of C-H bond by oxidation and decomposition process, there also has a lot of factors that affecting oil rancidity.
1. Effects of the oil itself is one of the factors influence oil rancidity. The main composition of the oil, the different types of fatty acids on the air reaction. For example, saturated fatty acids are more stable; unsaturated fatty acid is not stable, easy to react with oxygen in the air. The speed of this reaction is different because of the length of the carbon chain, the number of double bonds, the CIS trans isomerization and the conjugate. In addition, the oil containing the non - glycerol ester, the stability of the oil has an important impact. Such as crude oil moisture, enzyme and colloid than glycerol esters, they are likely to accelerate oil rancidity, but which contains vitamin E, phospholipids, and some of the pigment. Most of them have grease protection, delay rancidity process. These two situations seem contradictory, unified and effective solution is to filter and dehydration, after such treatment of oil is generally more stable. The stability of the highly refined oil is not good, the reason is that the oil in the oil refining, the natural antioxidant components of the more loss.
2. Environmental impact is also important to oil rancidity. Temperature, the same as the general chemical reaction, the oil temperature rise and oxidation rate is accelerated. The effect of oxygen partial pressure on the oxidation rate is also the case, and the temperature is not too high. The oil rancidity’s energy, Light is the most powerful promoter of lipid oxidation, it can stimulate free radical reaction, accelerated oxidation oil rancidity grease. The air is sufficient or not, has an important influence on the rate of oxidation rancidity.
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