GB/T 18114.4-2010Chemical analysis methods of rare earth concentrates - Part 4: Determination of niobium oxide, zirconium oxide and titanium oxide contents - Inductively coupled plasma atomic emission spectrometry (English PDF)

3 Reagents and materials

4 Apparatus

5 Test portion

6 Analytical procedure

7 Calculation and expression of the analytical results

8 Precision

9 Quality assurance and control

Foreword

GB/T 18114, Chemical analysis methods of rare earth concentrates, consists of 11 parts:

- Part 1: Determination of total rare earth oxides content - Gravimetric method;

- Part 2: Determination of thorium oxide content;

- Part 3: Determination of calcium oxide content;

- Part 4: Determination of niobium oxide, zirconium oxide and titanium oxide contents - Inductively coupled plasma atomic emission spectrometry;

- Part 5: Determination of aluminium oxide content - Inductively coupled plasma atomic emission spectrometry;

- Part 6: Determination of silicon dioxide content;

- Part 7: Determination of ferric oxide content - Potassium dichromate titration method;

- Part 8: Determination of fifteen rare earth oxides relative contents - Inductively coupled plasma atomic emission spectrometry;

- Part 9: Determination of phosphorus pentoxide content - Phosphorus-bismuth-molybdenum blue spectrophotometric method;

- Part 10: Determination of moisture content - Gravimetric method;

- Part 11: Determination of fluorine content - EDTA titration method.

This is Part 4.

This part is a revision of GB/T 18114.4-2000, Methods for chemical analysis of monazite concentrates - Determination of titanium oxide content, and GB/T 18114.5-2000, Methods for chemical analysis of monazite concentrates - Determination of zirconium oxide content.

Compared with GB/T 18114.4-2000 and GB/T 18114.5-2000, the main changes in this part are as follows:

- the determination of titanium by spectrophotometry and of zirconium by EDTA titration has been replaced by determination by inductively coupled plasma atomic emission spectrometry, and the determination of niobium has been added;

- the measurement range has been changed from 0.50% to 4.00% to 1.00% to 5.00% for ZrO2, and from 0.50% to 4.00% to 0.10% to 4.00% for TiO2;

- a clause on precision has been added;

- a clause on quality assurance and control has been added.

This part is under the jurisdiction of the National Technical Committee on Rare Earth of Standardization Administration of China (SAC/TC 229).

This part was drafted under the responsibility of Baotou Research Institute of Rare Earths and China Nonferrous Metals Industry Standards Metrology and Quality Research Institute.

This part was drafted by Baotou Research Institute of Rare Earths.

Inner Mongolia Baotou Steel Rare-Earth (Group) Hi-Tech Co., Ltd. and General Research Institute for Nonferrous Metals (Beijing) participated in the drafting of this part.

Main drafters of this part: Cui Aiduan, Jinsiqingaowa.

Participating drafters of this part: Zhang Yulong, Yao Yuanfang, Zheng Kun, Yang Ping, Chen Yunhong.

The previous editions of the standards replaced by this part are:

- GB/T 18114.4-2000, GB/T 18114.5-2000.