Paneth's adsorption rule

Paneth's adsorption rule

[′pan·əths ad′sȯrp·shən ‚rül]
(physical chemistry)
The rule that an element is strongly absorbed on a precipitate which has a surface charge opposite in sign to that carried by the element, provided that the resulting adsorbed compound is very sparingly soluble in the solvent.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.