Chemistry: physical processes – Physical processes – Crystallization
Patent
1972-04-20
1976-08-10
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
23253TP, 252408, G01N 2108, G01N 2506
Patent
active
039739090
ABSTRACT:
A method for determining the freeze point of an antifreeze-containing solution which includes simply dipping into the solution to be tested a bibulous material incorporated with a pH indicator and a buffer for maintaining the pH of the absorbed solution near or within the color change range of the indicator and comparing any apparent color change developed thereon to a color chart correlated to indicate various colors corresponding to various freeze points of antifreeze-containing solutions.
REFERENCES:
patent: 3006735 (1961-10-01), Jordan
patent: 3063812 (1962-11-01), Collins
patent: 3616696 (1971-11-01), Ludlow et al.
"The Physical Properties and Behavior of Ethylene and Propylene Glycol and Their Water Mixtures," L. D. Polderman, Presented in Ashrae, Jan. 26-29, 1959.
British Standard 3150: (1959) p. 15.
Ballinger et al., J. Am. Chem. Soc. 82,; 795-798. (1960).
Getman et al., "Outline of Physical Chemistry," New York: John Wiley and Sons Inc. 450-451, (1943).
Rapkin Myron Colman
Van der Werf Loren John
Miles Laboratories Inc.
Serwin R.E.
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