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GB/T 11064.2-2013 English PDF (GBT11064.2-2013)

GB/T 11064.2-2013 English PDF (GBT11064.2-2013)

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GB/T 11064.2-2013: Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride -- Part 2: Determination of lithium hydroxide content -- Acid-alkali titrimetric method

This Part of GB/T 11064 specifies the determination method of lithium hydroxide in lithium hydroxide monohydrate. This Part applies to the determination of lithium hydroxide in lithium hydroxide monohydrate. The determination range: more than 50.00%.
GB/T 11064.2-2013
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.120.99
H 64
Replacing GB/T 11064.2-1989
Methods for chemical analysis of lithium
carbonate, lithium hydroxide monohydrate and
lithium chloride -
Part 2. Determination of lithium hydroxide
content - Acid-alkali titrimetric method
ISSUED ON. SEPTEMBER 06, 2013
IMPLEMENTED ON. MAY 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 Samples ... 6
5 Analysis steps ... 6
6 Calculation of analysis results ... 7
7 Precision ... 8
8 Test report ... 8
Foreword
GB/T 11064.2-2013 ?€?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 2 of GB/T 11064.
This Part is drafted in accordance with rules given in GB/T 1.1-2009.
The Part replaces GB/T 11064.2-1989 "Methods for chemical analysis of lithium carbonate, lithium hydroxide monohydrate and lithium chloride - Part 2. Determination of lithium hydroxide content - Acid-alkali titrimetric method".
Compared with GB/T 11064.2-1989, 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. Xinjiang Wuxin Lithium Salt Development Co., Ltd., Sichuan Tianqi Lithium Co., Ltd., and Jiangxi Ganfeng Lithium Co., Ltd. The main drafters of this Part. Xia Shufen, Gou Haixia, Luo Yuping, Yi Qingyun, Zeng Xianqin, and Zhang Wenqin.
The historical version replaced by this Part is as follows.
- GB/T 11064.2-1989.
Methods for chemical analysis of lithium
carbonate, lithium hydroxide monohydrate and
lithium chloride -
Part 2. Determination of lithium hydroxide
content - Acid-alkali titrimetric method
1 Scope
This Part of GB/T 11064 specifies the determination method of lithium hydroxide in lithium hydroxide monohydrate.
This Part applies to the determination of lithium hydroxide in lithium hydroxide monohydrate. The determination range. more than 50.00%.
2 Method summary
The sample is dissolved in a certain amount of hydrochloric acid standard titration solution; use methyl red - bromocresol green as the indicator; continue to titrate with hydrochloric acid standard titration solution to titrate the total alkalinity of the test solution; use the consumed amount of hydrochloric acid standard titration solution to calculate the content of lithium hydroxide. Sodium and potassium content in test sample shall be converted to lithium hydroxide content, then subtracted from the calculation result.
3 Reagents
Unless otherwise indicated, all reagents used in this Part are analytical reagent, the water used is deionized water.
3.1 Methyl red - bromocresol green indicator. Pipette 30mL of bromocresol green solution (3.1.1) and 10mL of methyl red solution (3.1.2); mix well.
3.1.1 Bromocresol green solution. Weigh 0.1g of bromocresol green; dissolve it in 100mL of ethanol (95%) solution.
3.1.2 Methyl red solution. Weigh 0.2g of methyl red; dissolve it in 100mL of ethanol (95%) solution.
7 Precision
7.1 Repeatability
For the two independent test results obtained under repeatability conditions, within the average-value range as given below, the absolute difference of these two test results does not exceed the repeatability limit (r), and the situation exceeding repeatability limit (r) is not more than 5%. Repeatability limit (r), according to Table 1, adopts linear interpolation to obtain.
Table 1
wLiOH / % 53.41 55.50 57.09
r / % 0.057 0.076 0.088
7.2 Allowable difference
The difference of analysis results among laboratories shall not be more than the allowable difference in Table 2.
Table 2
Mass fraction of lithium hydroxide / % Allowable difference / %
> 50.00 0.25
8 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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