This standard establishes photometric and atomic absorption methods for the determination of copper (with a mass fraction of copper from 0.001 to 0.8%)
GOST 3240.12-1976 Referenced Document
GOST 11125-1984 Super pure nitric acid. Specifications*, 1984-04-19 Update
GOST 14261-1977 Hydrochloric acid super pure. Specifications*, 1977-04-19 Update
GOST 25086-1987 Nonferrous metals and their alloys. General requirements for methods of analysis*, 1987-04-19 Update