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AssigneeMinnesota Mining and Manufacturing Company
InventorsJerry W. Mlinar, John Neumayer
Estimating the term…
An article for testing liquid for free fatty acid comprises a substantially nonreactive, neutral and non-buffering, porous, absorbant support material having at least one portion thereof which contains a composition comprising an effective amount of acid-base indicator capable of changing color, when the predetermined amount of base has reacted with the known amount of free fatty acid, in a pH range on the order of 6-10, a predetermined amount of base compound reactive with free fatty acid and being present in an amount equivalent to a known concentration of free fatty acid, and about 30-99.5 parts by weight of non-volatile material of a substantially colorless, substantially neutral, humectant polyalkylene glycol organic solvent which is substantially non-volatile under ambient conditions. An organic liquid to be tested is contacted with the article and any color change in the article after the passage of sufficient time is observed.
An article for determining the concentration of free fatty acid in a liquid such as cooking oil, motor oil, and the like, said article comprising a substantially non-reactive, neutral, porous and oil absorbent, support material having at least one defined test area capable of absorbing a known volume of said liquid, said test area being impregnated with
A method of determining the concentration of free fatty acid in a liquid comprising
Dependencies are inferred from the claim text.