Abstract
The determination of the iodine adsorption number (I N) of carbon black (CB) by using a direct electrochemical reduction method was investigated. The results show that the I N measured by the electrochemical method is close to that obtained by traditional titration methods. A low relative standard deviation (RSD) of ca. 4–5%, for the I N values, shows the high precision of the measurements, while material balance calculation for the iodine in the measurement system confirmed the accuracy of the I N values. These results demonstrate the feasibility and reliability of the direct cathodic reduction method as an analytical method for I N.
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