ISO standards free download ISO 3980:1977 pdf download – Aluminium and aluminium alloys – Determination of copper – Atomic absorption spectrophotometric method ISO 3980:1977 pdf download - Aluminium and aluminium alloys - Determination of copper - Atomic absorption spectrophotometric method 4.6 Aluminium, 20 g/l base solution. Weigh, to the nearest 0,Ol g, 20 g of aluminium free from copper... 03-05 Read More