AMPHOTERIC BEHAVIOR OF COMPLEX SYSTEMS : II. TITRATION OF SULFANILIC ACID-GLYCINE MIXTURES.
Electrometric titrations of glycine, sulfanilic acid, and various mixtures of the two have been made. These mixtures are shown to give a curve which, between their respective isoelectric points, is different from that of either substance. These mixtures have a maximum buffering power at a pH which can be theoretically calculated, and which has the characteristics of an "isoelectric point of the system." Other pairs of ampholytes are shown to act in an analogous manner.
Stearn
A E
AE
Gates Chemical Laboratory, California Institute of Technology, Pasadena.