STABILIZATION OF THE COLLOIDAL Au$sup 19$$sup 8$

The effect of gold and gelatine concentration on the stability of Au/sup 198/ sols was investigated by the sedimentation method. Results indicate that gold sols behave in accordance with Bishop and Burton's rule. It is shown that organic polycarboxylic acids can in part substitute gelatine as stabilizers, and that the vicinity of COOH groups increases their stabilizing effect. The effect of HNO/sub 3/ remnants in preparation procedure was estimated and controlled. (auth)