On basis of specific colour reaction of BCO with Cu~(2+) in weak alkaline solution,method of spectrophotometric determination of Cu content in alkaline Zn plating bath with BCO is established.

• 本文根据 BCO 与二价铜离子在弱碱性溶液中的特效显色反应,制定了 BCO 光度法测定碱性镀锌溶液中的铜含量。