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A chromatographic method for the detection of bis‐(3‐sulfopropyl) disulfide (SPS), a common additive in acidic copper plating baths, and its breakdown products is demonstrated. The detection scheme involves a combination of solid‐phase extraction for sample pre‐treatment, C18 reversed‐phase high‐performance liquid chromatography column for separation, and electrochemical sensor for detection of all...
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