Development of high performance liquid chromatographic methods for copper cyanide plating bath additives. Final report.

摘要

The analysis of two plating bath additives used in a copper cyanide plating process are described. Methods were developed that produced HPLC separation of the components and identification of the separated components obtained through mass spectral and nuclear magnetic resonance analyses. The methods can be used for acceptance testing of the additives, and quantitation of components can be performed if suitable standards are obtained. Napthalene sulfonic acid detergents, diphenylsulfones, and five different unidentified compounds behaving like salts were found in additive A. Additive B was found to contain the compound 2-pentene-3-ol, and two or three more components may be present. Acidification with phosphoric acid to a pH of about 2.5 produced a distinctly different chromatogram, indicating the components are affected by pH.