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GB/T 11064.7-2013 (GB/T11064.7-2013, GBT 11064.7-2013, GBT11064.7-2013)
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GB/T 11064.7-2013: PDF in English (GBT 11064.7-2013)

GB/T 11064.7-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 64
Replacing GB/T 11064.7-1989
Methods for chemical analysis of lithium
carbonate, lithium hydroxide monohydrate and
lithium chloride -
Part 7. Determination of iron content -
1,10-Phenanthroline spectrophotometric method
ISSUED ON. NOVEMBER 27, 2013
IMPLEMENTED ON. AUGUST 01, 2014
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1  Scope ... 5 
2  Method Summary... 5 
3  Reagents ... 5 
4  Instrumentation ... 6 
5  Samples ... 6 
6  Analysis Steps ... 6 
7  Calculation of Analysis Results ... 7 
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 7 of GB/T 11064.
This Part is drafted in accordance with rules given in GB/T 1.1-2009.
This Part replaces GB/T 11064.7-1989 "Lithium carbonate, lithium hydroxide
monohydrate and lithium chloride-Determination of iron content - 1.10-phenanthroline
spectrophotometric method".
Compared with GB/T 11064.7-1989, 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.,
Jiangxi Dongpeng New Material Co., Ltd., Lithium-Calcium Company of CNNC
Jianzhong Nuclear Fuel Co., Ltd., Beijing General Research Institute of Mining &
Metallurgy, and Xinjiang Research Institute of Non ferrous Metals.
The main drafters of this Part. Ji Juanjuan, Wu Xiufen, Meng Cuiping, Zhong Haihua,
Tong Zhongkun, Luo Aibao, Jiang Qiutao, Chen Yan, and Guan Yuzhen.
The historical version replaced by this Part is as follows.
- GB/T 11064.7-1989.
GB/T 11064.7-2013 
Methods for chemical analysis of lithium carbonate,
lithium hydroxide monohydrate and lithium chloride -
Part 7. Determination of iron content -
1,10-Phenanthroline spectrophotometric method
1 Scope
This part of GB/T 11064 specifies the determination method of iron content in lithium
carbonate, in lithium hydroxide monohydrate, and in lithium chloride.
This part applies to the determination of iron content in lithium carbonate, in lithium
hydroxide monohydrate, and in lithium chloride. The determination range.
0.00030%~0.030%.
2 Method Summary
Dissolve the sample in hydrochloric acid. Reduce the iron (III) to iron (II) by ascorbic acid.
In the pH3.5 acetate buffer medium, iron (II) reacts with phenanthroline to produce a
salmon complex compound, whose absorbance shall be measured at the 510nm
wavelength of a spectrophotometer.
3 Reagents
Unless otherwise specified, the reagent used in this Part is an analytical pure reagent, and
the water used is the secondary deionized water.
3.1 Hydrochloric acid (1+1), GR.
3.2 Hydrochloric acid (1+7), GR.
3.3 Hydrochloric acid (2+1), GR.
3.4 Ammonia (1+1), GR.
3.5 Ascorbic acid solution (25g/L), prepared when it is used.
3.6 Phenanthroline solution (2g/L). weigh 0.2g of phenanthroline; dissolve it in 100mL of
ethanol solution (1+1).
3.7 Acetic acid - sodium acetate butter solution (pH3.5). weigh 16g of anhydrous sodium
acetate into a 500mL beaker. Add water to the beaker to dissolve; add 170mL of glacial
GB/T 11064.7-2013 
>0.005 0~0.007 5 0.000 8
>0.007 5~0.010 0.0010
>0.010~0.030 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.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.