JIS G 1222-1:2025

Current Revision
Iron and steel-Determination of cobalt-Part 1: Tricobalt tetraoxide gravimetric method after precipitation separation of 1-nitroso-2-naphthol complex

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JIS G 1222-1:2025

Iron and steel-Determination of cobalt-Part 1: Tricobalt tetraoxide gravimetric method after precipitation separation of 1-nitroso-2-naphthol complex

PUBLISH DATE 2026
JIS G 1222-1:2025

This Standard specifies the **tricobalt tetraoxide gravimetric method** after precipitation separation of *1-nitroso-2-naphthol complex*, used for determination of cobalt in iron and steel.

This method is applicable to determination of cobalt contents (mass fraction) from 0.5 % to 20 %.

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