acid value

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Related to Acid number: Iodine number
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  • noun

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(chemistry) the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize it

References in periodicals archive ?
ASTM Standard D664, 2009, "Standard Test ethod or Acid Number of Petroleum Products byPotentiometric Titration," ASTM International, West onshohocken, PA, 2009
Storage of the low-stability B20 in the fuel tank for 26 weeks showed no change in acid number and an IP above 3 hr at the end of this time frame.
The liquid phase in the sealed tubes was analyzed for Total Acid Number (TAN), by Ion Chromatography (IC), and High Performance Liquid Chromatography (HPLC) to identify and/or measure the concentration of remaining process chemicals and/or decomposition products.
NOMENCLATURE HFC = Hydrofluorocarbon HPLC = High Performance Liquid Chromatography IC = Ion Chomatography ICP = Inductively Coupled Plasma PAG = Polyalkylene Glycol POE = Polyolester TAN = Total Acid Number TOA = Total Organic Acid
Lactic acid, proprionic acid and a few others also can contribute to the total volatile acid number.
These new test methods are: ASTM D664 (for acid number of petroleum products by potentiometric titration), ASTM D5291 (for instrumentation determination of carbon, hydrogen, and nitrogen in petroleum products and lubricants), and ASTM D5622 (for determination of total oxygen in gasoline and methanol fuels by reductive pyrolysis).
Henkel has received a patent for a waterborne adhesive comprised of 1 to 50 weight percent of a (meth)acrylate copolymer the copolymer having an acid number from 0 to 150 mgKOH/g, 2 to 30 weight percent of natural polymers, selected from the group consisting of starch, dextrin, cellulose, and proteins, 0.
Resins composed of acid number equaling 40 had a different amount of acrylic acid present to obtain the desired acid value.
In the FT-IR spectrum of the coevaporated products of flurbiprofen and fatty acid number of bands due to wagging of methylene of fatty acid, were reduced.
As shown in Table 3, these four mammalian animals have the same deduced amino acid number, 509 amino acids.
Functional group test, decrease in iodine number, increase in acid number and IR spectra confirms the sulfonation on the benzene ring (probably at ortho and para positions).
Furthermore the source said that the new fields produce less acidic crude but cautioned that it is too soon to say what the total acid number (TAN) would be.
In addition, the analyzer can also test for methanol, blend percent, and acid number.