CB/T 3905.5-1999 Method for chemical analysis of tin-based bearing alloys Sodium diethylthiocarbamate colorimetric method for determination of copper content (English Version)
2005CB/T 3905.5-2005 Method for chemical analysis of tin-base bearing alloy - Part 5: Sodium diethyldithiocarbamate photometric method for the determination of copper content
1989CB/T 3905.5-1999 Method for chemical analysis of tin-based bearing alloys Sodium diethylthiocarbamate colorimetric method for determination of copper content