Method for analyzing concentration of glue contained in electrolyte solution

A method for analyzing the concentration of glue contained in a copper electrolyte solution containing an electrolyte component by using high performance liquid chromatography, consisting essentially of the steps of:

• injecting the electrolyte solution into an eluent which is an aqueous mixture of sodium dihydrogenphosphate and phosphoric acid and whose pH has been adjusted to equal to or less than 5 by adding an acid to an aqueous solution of phosphate of alkaline metal or alkaline earth metal;
• passing the electrolyte solution-injected eluent through a single analytical separation column having an exclusion limit molecular weight of 4000-6000 and having a particle diameter of 5-20 μm to separate the glue and the electrolyte component, the separation column including a filler of a porous hydrophilic vinyl polymer,
• wherein the single separation column retains the electrolyte component and allows the glue component to elute from the separation column earlier than the electrolyte components;
• and
• detecting the separated glue by a glue analyzing detector before detecting the electrolyte component, the detector performing quantitative analysis of the separated glue wherein the single analytical separation column and the detector are connected directly without an intervening column therebetween, and the glue and the electrolyte components are directly introduced to the detector,
• wherein the concentration of the glue is detected by the single analytical separation column and the single glue analyzing detector.