How do you make Hanus iodine solution?

Hanus solution ( it’s prepared by dissolving 18.2 g of iodine in 1L of glacial acetic acid and then add 3 ml of bromine water for increasing the halogen content. 0.1 N Sodium thiosulfate solution.

How do you calculate iodine value?

Iodine value (IV) is a measure of the unsaturation of oil and fat. It is expressed as the mass of iodine consumed by 100 g of oil or fat, and it is usually determined by chemical methods such as Wijs method, Hanus and Hubel, Hofmann and Green, Rosenmund-Kuhnhenn, or a modification of the Wijs method.

What is Hanus method?

: a method for determining the iodine number of an oil or fat that consists in adding a mixture of iodine and bromine in glacial acetic acid and estimating the excess of unused halogen by titration with sodium thiosulfate.

How do I calculate my Ester value?

The Ester Value is the number of mg of potassium hydroxide required to saponify the esters in 1.0 g of the substance. If the Saponification Value and the Acid Value have been determined, the difference between these two represents the Ester Value, i.e., Ester Value = Saponification Value – Acid Value.

How is saponification number calculated?

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.

Which oil has highest iodine value?

Thus, the higher the iodine value, the more unsaturations are present in the fat….Iodine values of various oils and fats.

What is the normal range of iodine value?

Decrease in iodine value shows decrease in the number of double bonds and it indicates oxidation of the oil. Iodine value recommended standards are as follows (g of iodine/100g of oil): Palm 50-55, corn 103-135, soybean 120-143, sunflower 110-143 and peanut 84-105 [12].

What is the role of WIJS solution?

The Wijs solution, iodine monochloride dissolved in acetic acid, is used to determine the iodine value of a substance. It can also be used to prepare iodates, by reaction with a chlorate. Chlorine is released as a byproduct.

What is the formula for acid value?

Often, the acid value is converted to an FFA content by multiplying the acid value with a factor that equals the molecular weight of the fatty acid concerned (usually oleic acid, MW = 282.4) divided by ten times the molecular weight of the potassium hydroxide (56.1).

What is the principle of saponification?

Saponification value of fat/oil. Saponification is the process by which the fatty aids in the triglycerides or fat are hyrdrolysed by an alkali to give glycerol and potassium salts of fatty acids. A known quantity of fat or oil is refluxed with an excess amount of alcoholic KOH.

What type of reaction is saponification?

1.3 Saponification. Saponification can be defined as a “hydration reaction where free hydroxide breaks the ester bonds between the fatty acids and glycerol of a triglyceride, resulting in free fatty acids and glycerol,” which are each soluble in aqueous solutions.

Is iodine value good or bad?

Deterioration in the vegetable oils is reflected by the decrease in iodine value. Iodine value is used to measure unsaturation or the average number of double bonds in fats and oils. A high, iodine value indicates high unsaturation.

How is the iodine value of Hanus reagent calculated?

The iodine value is calculated as grams of iodine per 100 g of sample. Hanus reagent is a solution of iodobromide in concentrated acetic acid. The iodine combines

What does MSD stand for in Hanus solution?

Hanus solution MSDS (material safety data sheet) or SDS, CoA and CoQ, dossiers, brochures and other available documents. An invalid quantity was specified. The product quantity has been adjusted. Retrieving availability…

How many solute are in a solution preparation?

Solution Preparation (7) It is a solution that contains 1 mole of solute in each liter of solution. Units of molarityUnits of molarity The units for molar concentration are mol/L.

How are serial dilutions used in solution preparation?

Solution Preparation (14) A serial dilution is simply a series of simple dilutions which amplifies the dilution factor quickly beginning with a small initial quantity of material. The source of dilution material for each step comes from the diluted material of the previous.