different amounts of UPD silver (
Ag) is studied by using voltammetry, electrode washings, and analytical tech-niques. It is found that carbon monoxide is adsorbed only on the sites unoccupied by Agad and rather than dis-
placing the latter atoms to the noticeable extent. The fraction of carbon monoxide chemisorbed in the linear
form increases with
Ag. The shape of anodic voltammetric curves and the number of peaks in the region where the mixed layer
ads + Agad is desorbed strongly depend on the 
ads : Agad ratio; at small and medium 
g , three and more peaks are observed. Electroanalytic detection of silver passed to solution in various potential
ranges in the course of the mixed-layer oxidation allowed us to identify the processes corresponding to different
peaks.