Development of a quasi-on-time ICP-OES for analyzing electrode reaction products

A quasi-on-time system for analyzing electrode reaction products was developed by combining inductively coupled plasma-optical emission spectrometry (ICP-OES) with a hydrodynamic electrochemical technique. Numerical calculations and experiments showed that the shorter the distance of the withdrawing flow channel from the electrode end to the OES detector, the shorter the time response and the detection efficiency is 98.1%, which enables the transient determination of the generation rate for products. Application of the combined system with sufficient time resolution to the analysis of reaction species generated from a Cu electrode in a chloridecontaining aqueous solution showed that the addition of benzotriazole (BTA) above a critical concentration of 10 mol m-3 is effective in inhibiting the dissolution of Cu. The development of the quasi-on-time system of analysis would enable application to a wide range of non-steady-state electrochemical reactions including corrosion.

Automated summary

A quasi-on-time system for analyzing electrode reaction products is developed by combining ICP-OES with a hydrodynamic electrochemical technique. The shorter the distance between the electrode end and the OES detector, the shorter the time response and the higher the detection efficiency (98.1%). Application of this system to analyze reaction species generated from a Cu electrode in a chloride-containing solution demonstrates the effective inhibition of Cu dissolution by adding BTA above a critical concentration of 10 mol m-3.