Why peroxide value is not considered as a reliable method for estimating the extent of oxidation?

The test is not sensitive and the end-point is questionable because it requires too high a level of oxidation that is beyond the point where flavor deterioration occurs, especially with vegetable oils containing linolenic acid and fish oils containing n–3 polyunsaturated fatty acids.

What is the significance of measuring the peroxide value of an oil fat sample?

Other methods are available, but peroxide value is the most widely used. It gives a measure of the extent to which an oil sample has undergone primary oxidation, extent of secondary oxidation may be determined from p-anisidine test. The double bonds found in fats and oils play a role in autoxidation.

What is peroxide value and its significance?

Peroxide value is the most commonly used assay for measuring the state of oxidation in fats and oils and its value measures the oxidative rancidity or degree of oxidation of the fat/oil, but not its stability.

Why does hydrogen peroxide increase in value?

Peroxide value increased with increasing moisture content and reduced with increasing roasting duration.

What reduces the value of hydrogen peroxide in oil?

The uses of bagasse as adsorbet by activate it with a solution of NaOH for 200 minutes. In this study, bagasse will be used to reduce peroxide value in used cooking oil. Peroxide value is measure of oxidation or rancidity which can reduce the qualities of food.

What is the peroxide value of canola oil?

3.1 Chemical properties The peroxide values (PV) of all the cold pressed rapeseed oils tested from different varieties ranged from 0.38 to 0.84 meq O2/kg oil.

Why a low peroxide value can give a false impression of freshness?

Peroxide values are good guides to assessing the quality of oil, however there are several disadvantages associated with PV determination. Results obtained can be misleading such that a low PV may have resulted from fast breakdown of hydroperoxides, rather than slow hydroperoxide formation.

What does low peroxide value mean?

The amount of peroxide value of fats indicate the degree of primary oxidation and therefore its likeliness of becoming rancid. A lower number of peroxide value indicates a good quality of oil and a good preservation status.

What is peroxide value in palm oil?

The peroxide value in the palm oil points out the state of oxidation of a substance. If oxidation proceed for long, it makes the oil rancid and give an unpleasant smell to the substance. This phenomenon is influenced by temperature of preservation and by the contact with air and light.

What is a high peroxide value?

High peroxide levels indicate that oil has been damaged by free radicals and will give rise to aldehydes and ketones that can cause oil to smell musty and rancid. These reactions are accelerated by heat, light, and air. Like with levels of Free Fatty Acids, be wary of refined or blended olive oils.