phthalate buffer

phthalate buffer

[′tha‚lāt ′bəf·ər]
(analytical chemistry)
Laboratory pH reference solution made of potassium hydrogen phthalate, KHC8H4O4; at 0.05 molal, the pH is 4.008 at 25°C.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.