With the increase in silanol percentage, the capacitance decreases at higher pH values and increases at lower pH values with a left shift in the capacitance curve. The capacitance minima correspond to the isoelectric point. The combination of the percentage of silanol groups can thus be determined by CT with the position of the isoelectric point and the amplitude variation at the highly acidic/alkaline pH values. The left shift of the capacitance shows the dominance of silanol with an increasing percentage that decreases the effective isoelectric point of the system. The subsequent increase in the flatness of the constant capacitance after 50% (silanol sites) denotes the increased difference in the pK values of the system. This approach confirms the AA's fingerprints with the existence of dominating reactive sites and differentiates from the bare Carboxylimmobilized AAs with 100% surface coverage.