Measurement of Acidity
Measurement of Acidity
Contents 1.Definition Total acidity, Effective acidity Volatile acidity acidity in milk(apparent acidity,developed acidity) 2.Effects of acids on food process 3.Source and distribution of acids in food 4.Measurement of acidity
Contents 1. Definition Total acidity, Effective acidity Volatile acidity acidity in milk (apparent acidity, developed acidity) 2. Effects of acids on food process 3. Source and distribution of acids in food 4. Measurement of acidity
Definition Total acidity The total acidity is a measure of all the hydrogen ions (H+)of both the fixed and volatile acids present in food. These included: 1)the potential H+(hydrogen ions)able to be released. 2)Plus those H+already released,existing free H+in food Total acidity is amore accurate representation of the acid concentration than titratable acidity,however it is difficult to measure.Hence,the easier to measure titratable acidity is used to approximate total acidity
Definition Total acidity The total acidity is a measure of all the hydrogen ions (H+) of both the fixed and volatile acids present in food. These included: 1) the potential H+ (hydrogen ions) able to be released. 2) Plus those H+ already released, existing free H+ in food Total acidity is amore accurate representation of the acid concentration than titratable acidity,however it is difficult to measure. Hence, the easier to measure titratable acidity is used to approximate total acidity
Effective acidity The effective acidity in food depends on the concentration of all acids in food as well as their tendency to dissociate hydrogen ions.It is the concentration of H+. Effective acidity is measured as pH
Effective acidity The effective acidity in food depends on the concentration of all acids in food as well as their tendency to dissociate hydrogen ions. It is the concentration of H+ . Effective acidity is measured as pH
Volatile acidity Volatile acidity is often abbreviated to VA Volatile acidity,as the name suggests,refers to the organic acids found in wine,grape juice etc that are more volatile or more easily vaporized than the non-volatile or fixed acids (malic acid) Volatile acids,because their volatility,are able to be steam distilled over,collected and their concentration determined. the main volatile acidity include:acetic acid, butyric acid,etc
Volatile acidity Volatile acidity is often abbreviated to VA Volatile acidity, as the name suggests,refers to the organic acids found in wine, grape juice etc that are more volatile or more easily vaporized than the non-volatile or fixed acids (malic acid) Volatile acids,because their volatility,are able to be steam distilled over, collected and their concentration determined. the main volatile acidity include: acetic acid, butyric acid, etc