Why do we calculate ester value?

The ester value shows the amount alkali consumed in the saponification of the esters and is possible identify and differentiate the waxes with this value; for example beeswax ester value is 72 to 79 mg KOH/ g, candelilla wax ester value is 31 to 43 mg KOH/g and carnauba wax ester value is 74 to 78 mg KOH/g.

How do you calculate saponification value?

Saponification Value = (A – B) x N x 56.1 W This method is used to determine the total acid content, both free and combined, of tall oil. (Acid number only measures the free acid). The combined acids are primarily esters formed by reaction with the neutral components present in the original tall oil.

How do you determine acid value?

The acid value is determined by directly titrating the oil/fat in an alcoholic medium against standard potassium hydroxide/sodium hydroxide solution.

Is Ester Value and saponification value same?

Saponification value is a measure of the content of ester linkages. It is determined by back titration of potassium oxide in the presence of phenolphthalein indicator with 0.5 N sulfuric or hydrochloric acid.

What is ester value?

c) Ester value: The Ester value is the number of milligrams of potassium hydroxide required to react with esters present in 1 g of fat or oil. The difference between saponification value and acid value is called Ester value [2, 14, 15, 16]. Ester value = Saponification value – Acid value.

What is Ester value?

Why KOH is used in saponification?

The saponification value corresponds to the mass in mg of potassium hydroxide (KOH – commonly known as potash) needed to neutralize the free fatty acids and saponify the esters contained in a gram of material.

What is high saponification value?

The larger the saponification number, the better the soap making ability of the oil. • Higher saponification value for triglyceride indicates higher medium chain fatty acids.

What is acetyl value and its significance?

Definition of acetyl value : a measure of the free hydroxyl groups in a substance (as a fat or oil) as determined by acetylation, being the number of milligrams of potassium hydroxide required for neutralization of the acetic acid formed by hydrolysis of one gram of the acetylated substance.

What is the role of KOH in acetyl value determination?

The Acid Value is the number of milligrams of potassium hydroxide (KOH) necessary to neutralize the fatty acids in 1 gram of sample. Higher AV materials allow faster appearing but less stable suds creation. Lower AV materials allow slower to appear but more stable suds formation.