[Analysis of organic additives in copper-plating brightener by high performance liquid chromatography]

This paper describes a high performance liquid chromatographic method for analysis of organic additives in copper-plating brightener. The copper-plating brightener was filtered through 0.45 microgram micropore membrane and determined on a Spherisorb-C6H5 column, with V(methanol):V(water) = 30:70 mobile phase at the flow rate of 1.5 mL/min, and detected at UV 210 nm. 2-benzimidazolethiol, ethylene thiourea, 1-propanesulfonic acid 3,3'-dithio-bis-disodium salt were separated and determined. The recoveries were more than 99% with CV less than 1%. The method is simple and rapid.