Abstract
Analysis of pyrophosphate, orthophosphate and dimercaptothiadiazole (brightening agent) in a copper pyrophosphate bath and mercaptobenzothiazole-S-propanesulfate (brightening agent) in an acidic copper sulfate bath was carried out by isotachophoresis using hydrochloric acid and ε-amino-n-caproic acid as the leading electrolyte and sodium caproate as the terminal electrolyte.
Simultaneous analysis of sulfate and chloride in an acidic copper sulfate bath was carrid out by isotachophoresis using calcium hydroxide as the leading electrolyte and sodium acetate as the terminal electrolyte.
Catalytically poisoning metals and copper can be simultaneously analyzed by isotachophoresis, but poisoning metals were not detected in commercially available plating baths.
The concentrations of pyrophosphate, orthophosphate and copper in plating baths obtained by isotachophoresis were virtually identical to almost the same as to those found by titration.
