GB/T 14635-2008
Rare earth metals and their compounds.Determination of total rare earth contents (English Version)

Standard No.

GB/T 14635-2008

Language

Chinese, Available in English version

Release Date

2008

Published By

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

Status

Be replaced 2021-10

Replace By

GB/T 14635-2020

Latest

GB/T 14635-2020

Replace

GB/T 12687.1-1990 GB/T 14635.1-1993 GB/T 14635.2-1993 GB/T 14635.3-1993 GB/T 16484.19-1996 GB/T 18882.1-2002 GB/T 8762.1-1988

Scope

Method 1 Oxalate gravimetric method: This method specifies the method for the determination of the total amount of rare earths in single and mixed rare earth metals and their compounds. This method is suitable for the determination of the total amount of rare earths in single and mixed rare earth metals and their compounds. ) Determination of the total amount of rare earths in single and mixed rare earth metals and their compounds each greater than 0.1%. Method 2 EDTA titration method: This method specifies the determination method for the total amount of rare earths in single rare earth metals and mixed rare earth metals and their compounds mainly composed of heavy rare earths holmium, erbium, thulium, ytterbium and lutetium. This method is suitable for the determination of the total amount of rare earth in single rare earth metals and mixed rare earth metals and their compounds mainly composed of heavy rare earth holmium, erbium, thulium, ytterbium and lutetium. Determination of rare earth content in a single rare earth metal and its compounds with a purity of less than 99.5% and other impurity elements greater than 0.5%; it does not apply to the total amount of thorium, scandium, and zinc in materials greater than 0.5%.

GB/T 14635-2008 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
• 2002 GB/T 18882.1-2002 Chemical analysis methods for mixed rare earth oxide of ion-absorpted type RE ore-Determination of total rare earth contents-Oxalate gravimetric method
• 1996 GB/T 16484.19-1996 Methods for chemical analysis of rare earth chloride and carbonate--Determination of total rare earth oxide content
• 1993 GB/T 14635.3-1993 Heavy rare earth metals and their compounds. Determination of total rare earth contents. EDTA volumetric method
• 1990 GB/T 12687.1-1990 Chemical analysis of nitrate of rare earth for agriculture--Determination of total rare earth oxide content--Gravimetric method
• 1988 GB/T 8762.1-1988 Yttrium oxide and europium oxide of phosphor grade--Determination of total rare earth oxide content--EDTA volumetric method

GB/T 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents has been changed from 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 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents has been changed from GB/T 16484.19-1996 Methods for chemical analysis of rare earth chloride and carbonate--Determination of total rare earth oxide content.

GB/T 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents has been changed from GB/T 18882.1-2002 Chemical analysis methods for mixed rare earth oxide of ion-absorpted type RE ore-Determination of total rare earth contents-Oxalate gravimetric method.

GB/T 14635-2008 Rare earth metals and their compounds.Determination of total rare earth contents has been changed from GB/T 8762.1-1988 Yttrium oxide and europium oxide of phosphor grade--Determination of total rare earth oxide content--EDTA volumetric method.