ISO 5933:1980
Boric acid, boric oxide, disodium tetraborates and crude sodium borates for industrial use — Determination of total nickel content of boric acid, boric oxide and disodium tetraborates and the alkali-soluble nickel content of crude sodium borates — Furil alpha-dioxime photometric method
ISO 2215:1972
Boric acid, boric oxide and Disodium tetraborates for industrial use — Determination of copper content — Zinc dibenzyldithiocarbamate photometric method
32003D0370