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An electrochemical approach to total organic carbon control in printed circuit board copper sulfate plating baths Part II: Overfall system

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Fig. 2. TOC removal for plating solution recycle: performance of a doped tin dioxide coated anode
Fig. 3. HPLC chromatograms of fresh and old plating baths. (a) Ultraviolet detector at 195 nm; (b) ultraviolet detector at 210 nm.
Fig. 4. HPLC chromatograms at various stages of electrochemical treatment of plating solution using an SnO 2 plate anode
Table 1. Selectivity test results for various cation membranes for protons against copper ions (40 mA cm ) 2 membrane current density anolyte, 2 M H 2 SO 4 , 0.31 M copper)
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