電位差滴定法による無電解銅めっき液中のホルムアルデヒドの定量

概要

論文の詳細を見る
The concentration of formaldehyde in electroless copper plating solution was determined by potentiometric titration with hydroxylamine hydrochloride using silver as the indicator electrode. The titration curves showed a sharp peak at the equivalent point. The reaction between formaldehyde and hydroxylamine proceeded quantitatively, and formaldehyde content could be determined accurately even at concentrations as low as 10ppm or less. Potential behaviour at the silver electrode can be explained by the mixed-potential theory, with the rest potential determined by the anodic oxidation of the reducing agent (formaldehyde before the peak and hydroxylamine after) and the cathodic reduction of dissolved oxygen. This method is more accurate and simpler than the customary sodium sulfite method.
一般社団法人表面技術協会の論文