What does acid value mean?
Definitions for acid value
acid val·ue
This dictionary definitions page includes all the possible meanings, example usage and translations of the word acid value.
Princeton's WordNet
acid valuenoun
(chemistry) the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize it
"as the glycerides in fat slowly decompose the acid value increases"
Wikipedia
Acid value
In chemistry, acid value (AV, acid number, neutralization number or acidity) is a number used to quantify the acidity of a given chemical substance. It is the quantity of base (usually potassium hydroxide (KOH)), expressed as milligrams of KOH required to neutralize the acidic constituents in 1 gram of a sample.The acid number is a measure of the number of carboxylic acid groups (−C(=O)OH) in a chemical compound, such as a fatty acid, or in a mixture of compounds. In other words, it is a measure of free fatty acids (FFAs) present in a substance. In a typical procedure, a known amount of sample dissolved in an organic solvent (often isopropanol) and titrated with a solution of alcoholic potassium hydroxide (KOH) of known concentration using phenolphthalein as a colour indicator. The acid number for an oil sample is indicative of the age of the oil and can be used to determine when the oil must be changed.A liquid fat sample combined with neutralized 95% ethanol is titrated with standardized sodium hydroxide of 0.1 eq/L normality to a phenolphthalein endpoint. The volume and normality of the sodium hydroxide are used, along with the weight of the sample, to calculate the free fatty acid value.Acid value is usually measured as milligrams of KOH per gram of sample (mg KOH/g fat/oil), or grams of KOH per gram of sample (g KOH/g fat/oil).
ChatGPT
acid value
Acid value is a measure of the amount of free acid in a substance, particularly in fat and oil. It's expressed in terms of the quantity of potassium hydroxide necessary to neutralize the free acids present in one gram of the substance. It's usually an indicator of the quality and age of the oil or fat, as well as the level of impurities or potential hydrolytic rancidity. It is determined by titration and given in mg KOH/g.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of acid value in Chaldean Numerology is: 3
Pythagorean Numerology
The numerical value of acid value in Pythagorean Numerology is: 6
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"acid value." Definitions.net. STANDS4 LLC, 2024. Web. 27 Apr. 2024. <https://www.definitions.net/definition/acid+value>.
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