Chemistry: analytical and immunological testing – Lubricant – grease – mineral oil – hydrocarbon oil product – or... – Acidity – basicity or neutralization number
Patent
1985-04-09
1987-03-31
Turk, Arnold
Chemistry: analytical and immunological testing
Lubricant, grease, mineral oil, hydrocarbon oil product, or...
Acidity, basicity or neutralization number
422 56, 436 20, 436163, G01N 2180, G01N 3303
Patent
active
046543090
ABSTRACT:
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.
REFERENCES:
patent: 2770530 (1956-11-01), Bergstrom et al.
patent: 2915373 (1959-12-01), Wenker
patent: 2953439 (1960-09-01), Elliott et al.
patent: 3006735 (1961-10-01), Jordan
patent: 3016292 (1962-01-01), Bauer et al.
patent: 3030190 (1962-04-01), Seemann et al.
patent: 3067015 (1962-12-01), Lawdermilt
patent: 3122420 (1964-02-01), Rebar, Jr. et al.
patent: 3193356 (1965-07-01), Smith
patent: 3238020 (1966-03-01), Eiseman
patent: 3259463 (1966-07-01), Feasley et al.
patent: 3420635 (1969-01-01), Davis
patent: 3543570 (1970-12-01), Fijalkowski
patent: 3552929 (1971-01-01), Fields et al.
patent: 3580704 (1971-05-01), Pickup et al.
patent: 3615226 (1971-10-01), Apter
patent: 3682597 (1972-08-01), Husch
patent: 3791988 (1974-02-01), Josef et al.
patent: 3808149 (1974-04-01), Ellis et al.
patent: 3980437 (1976-09-01), Kishimoto et al.
patent: 4013416 (1977-03-01), Rittersdorf et al.
patent: 4017261 (1977-04-01), Svoboda et al.
patent: 4098575 (1978-07-01), Matsushito
patent: 4252903 (1981-02-01), Kallies
patent: 4275031 (1981-06-01), Fischer et al.
patent: 4387164 (1983-06-01), Hevey et al.
Mlinar Jerry W.
Neumayer John
Francis Richard
Minnesota Mining and Manufacturing Co.
Sell Donald M.
Smith James A.
Turk Arnold
LandOfFree
Test method and article for estimating the concentration of free does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Test method and article for estimating the concentration of free, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Test method and article for estimating the concentration of free will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2212907