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GB/T 11064.6-2013 English PDF (GBT11064.6-2013)

GB/T 11064.6-2013 English PDF (GBT11064.6-2013)

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GB/T 11064.6-2013: Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride -- Part 6: Determination of magnesium content -- Flame atomic absorption spectrometric method

This part of GB/T 11064 specifies the determination method of magnesium content in lithium carbonate, in lithium hydroxide monohydrate, and in lithium chloride. The part applies to the determination of magnesium content in lithium carbonate, in lithium hydroxide monohydrate, and in lithium chloride. The determination range: 0.0005% ~ 0.020%.
GB/T 11064.6-2013
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.120.99
H 64
Replacing GB/T 11064.6-1989
Methods for chemical analysis of lithium carbonate,
lithium hydroxide monohydrate and lithium chloride -
Part 6. Determination of magnesium content -
Flame atomic absorption spectrometric method
ISSUED ON. NOVEMBER 27, 2013
IMPLEMENTED ON. AUGUST 01, 2014
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Method Summary... 5
3 Reagents ... 5
4 Instrument ... 6
5 Samples ... 6
6 Analysis Steps ... 6
8 Precision ... 8
9 Test report ... 9
Foreword
GB/T 11064 ?€?Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride?€? is divided into 16 parts.
- Part 1. Determination of lithium carbonate content - Acid-alkali titrimetric method; - Part 2. Determination of lithium hydroxide content - Acid-alkali titrimetric method; - Part 3. Determination of lithium chloride content - Potentiometric method; - Part 4. Determination of potassium and sodium content - Flame atomic
absorption spectrometric method;
- Part 5. Determination of calcium content - Flame atomic absorption spectrometric method;
- Part 6. Determination of magnesium content - Flame atomic absorption
spectrometric method;
- Part 7. Determination of iron content - 1,10-phenanthroline spectrophotometric method;
- Part 8. Determination of silicon content - Molybdenum blue spectrophotometric method;
- Part 9. Determination of sulfate content - Barium sulfate nephelometry method; - Part 10. Determination of chloride content - Silver chloride nephelometry method; - Part 11. Determination of Acid-insolubles Content - Gravimetric method; - Part 12. Determination of carbonate content - Determination of lithium chloride content - Potentiometric method;
- Part 13. Determination of aluminum content - Chromazurol S-cetylpyridine bromide spectrophotometric method;
- Part 14. Determination of arsenic content - Molybdenum blue spectrophotometric method;
- Part 15. Determination of fluoride content - Ion selective method;
- Part 16. Determination of calcium, magnesium, copper, lead, zinc, nickel, manganese, cadmium and aluminum content - Inductively coupled plasma
atomic emission spectrometry.
This Part is part 6 of GB/T 11064.
This Part is drafted in accordance with rules given in GB/T 1.1-2009.
The Part replaces GB/T 11064.6-1989 "Lithium carbonate, lithium hydroxide monohydrate and lithium chloride-Determination of magnesium content-Flame atomic absorption spectrometric method".
Compared with GB/T 11064.6-1989, the main changes of this Part are as follows. - ADD the repeatability terms;
- RE-EDIT the text format; ADD the test report.
This Part shall be under the jurisdiction of National Standardization Technical Committee of Nonferrous Metals (SAC/TC 243).
Drafting organizations of this Part. Ganzhou Non-ferrous Metallurgy Research Institute, Xinjiang Research Institute of Non ferrous Metals, and Haimen Ronghui General Lithium Co., Ltd.
The main drafters of this Part. Pan Jianzhong, Zeng Xianqin, Liu Bailu, Guan Yuzhen, Wang Hongchuan, Deng Hongyun, and Lizhendong.
The historical version replaced by this Part is as follows.
- GB/T 11064.6-1989.
Methods for chemical analysis of lithium carbonate,
lithium hydroxide monohydrate and lithium chloride -
Part 6. Determination of magnesium content - Flame
atomic absorption spectrometric method
1 Scope
This part of GB/T 11064 specifies the determination method of magnesium content in lithium carbonate, in lithium hydroxide monohydrate, and in lithium chloride. The part applies to the determination of magnesium content in lithium carbonate, in lithium hydroxide monohydrate, and in lithium chloride. The determination range. 0.0005% ~ 0.020%.
2 Method Summary
Use hydrochloric acid to decompose lithium carbonate and lithium hydroxide monohydrate; dissolve the lithium chloride specimen with water; in the hydrochloric acid medium, use the air-acetylene flame to measure the absorbance of magnesium at 285.2 nm wavelength of atomic absorption spectrometer; use the working curve method to determine the magnesium.
3 Reagents
Unless otherwise specified, the reagent used in the part is an analytical pure reagent, and the water used in this Part is the secondary deionized water.
3.1 Hydrochloric acid (1+1).
3.2 Lanthanum salt solution. weigh 15.9 g of lanthanum chloride (analytical pure, LaCl3??6H2O); place in a 250 mL beaker; dissolve with water, add few drops of hydrochloric acid (3.1) to make it clear; transfer into a 500 mL volumetric flask; dilute to the scale with water; mix well. 1 mL of this solution contains 12.5mg of lanthanum.
3.3 Strontium salt solution. weigh 60.4 g of strontium nitrate [analytical pure, Sr(NO3)2]; place into a 250 mL beaker; dissolve with water; transfer into a 500 mL volumetric flask; dilute to the scale with water; mix well. 1 mL of this solution contains 50mg of strontium. 3.4 Magnesium standard stock solution. weigh 1.658 0 g; burn at 800??C for 2h; place in Table 3
Mass fraction of magnesium / % Allowable difference / %
0.000 5~0.001 0 0.000 30
>0.001 0~0.002 5 0.000 6
>0.002 5~0.005 0 0.000 9
>0.005 0~0.007 5 0.001 2
>0.007 5~0.010 0.002 0
>0.010~0.020 0. 003
9 Test report
The test report shall contain the following content.
- Sample;
- The number of this Part national standard;
- Analysis result and its expression;
- Difference with the basic analysis step;
- Anomalies observed in the determination;
- Determination date.

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