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Concentration of released silver (Ag) ions (inductively coupled plasma [ICP] values) of the substrate disc surface (group A) and disc surfaces coated with Ag or Ag-platinum (Pt) alloys (group B, 100 wt% Ag; group C, Ag–1 wt% Pt; group D, Ag–3 wt% Pt; group E, Ag–7 wt% Pt).
