GB/T 12687.1-1990
Chemical analysis of nitrate of rare earth for agriculture--Determination of total rare earth oxide content--Gravimetric method

Be replaced

Standard No.

GB/T 12687.1-1990

Language

Chinese

Release Date

1990

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Replace By

GB/T 14635-2008

Lastest

GB/T 14635-2020

Scope

This standard specifies the method for the determination of the total amount of rare earth oxides in rare earth nitrate for agricultural use. This standard is applicable to the determination of the total amount of rare earth oxides in agricultural rare earth nitrate, and the determination range is 30% to 70%.

GB/T 12687.1-1990 history

• 2020 GB/T 14635-2020 Rare earth metals and their compounds—Determination of total rare earth content
• 2008 GB/T 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents
• 1990 GB/T 12687.1-1990 Chemical analysis of nitrate of rare earth for agriculture--Determination of total rare earth oxide content--Gravimetric method

GB/T 12687.1-1990 Chemical analysis of nitrate of rare earth for agriculture--Determination of total rare earth oxide content--Gravimetric method was changed to GB/T 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents.

GB/T 12687.1-1990 -All Parts