YS/T 1028.4-2015Methods for chemical analysis of lithium iron phosphate. Part 4: Determination of carbon content. High frequency combustion with infrared absorption method (English PDF)
磷酸铁锂化学分析方法 第4部分：碳量的测定 高频燃烧红外吸收法
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Issued by
Ministry of Industry and Information Technology of PRC
Level / Type
National · Recommended
Issue date
April 30, 2015
Implementation date
October 1, 2015
Scope
YS/T 1028.4-2015 is the English-translated version of 磷酸铁锂化学分析方法 第4部分：碳量的测定 高频燃烧红外吸收法.
YS/T 1028.4-2015 — This part of YS/T 1028 specifies the method for determining the carbon content in lithium iron phosphate. This part applies to the determination of carbon content in lithium iron phosphate. Measuring range. 0.5%~5.0%.
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Document preview — YS/T 1028.4-2015
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 71
Issued by: Ministry of Industry and Information Technology of PRC
Contents
- Foreword...3
- 1 Scope...4
- 2 Method summary...4
- 3 Reagents and materials...4
- 4 Instruments...5
- 5 Samples...5
- 6 Analysis steps...5
- 7 Precision...6
- 8 Test report...7
Foreword
YS/T 1028 Methods for chemical analysis of lithium iron phosphate consists of 5 parts.
-- Part 1.Determination of total iron content - Titanium trichloride reduction
potassium dichromate titration methods;
-- Part 2.Determination of lithium content - Flame photometry;
-- Part 3.Determination of phosphor content - Quinoline phosphomolybdate
gravimetry;
-- Part 4.Determination of carbon content - High frequency combustion with
infrared absorption method;
-- Part 5.Determination of calcium, magnesium, zinc, copper, lead, chromium,
sodium, aluminium, nickel, cobalt and manganese content - Inductively coupled
plasma atomic emission spectrometry
This part is Part 4 of YS/T 1028.
This part was drafted in accordance with the rules given in GB/T 1.1-2009.
This part was proposed and shall be under the jurisdiction of the National Technical
Committee on Nonferrous Metals of Standardization Administration of China
(SAC/TC243).
Drafting organizations of this part. Guangdong Brunp Recycling Technology Co., Ltd.,
Guangzhou Research Institute of Nonferrous Metals, Beijing General Research
Institute of Mining & Metallurgy.
Main drafters of this part. Li Changdong, Yu Haijun, Xie Yinghao, Zhang Xuemei,
Zhuang Aichun, Xiong Xiaoyan, Tang Weixue, Xu Xiaoyan, Feng Xianjin.
Methods for chemical analysis of lithium iron phosphate -
Part 4.Determination of carbon content - High frequency
combustion with infrared absorption method
1 Scope
This part of YS/T 1028 specifies the method for determining the carbon content in
lithium iron phosphate.
This part applies to the determination of carbon content in lithium iron phosphate.
Measuring range. 0.5%~5.0%.
2 Method summary
The sample and flux are put into a porcelain crucible and heated with a high-frequency
induction furnace in the oxygen flow. The carbon is burned to generate carbon dioxide,
which is carried by the oxygen to the infrared absorption cell. The change of carbon
dioxide concentration on infrared absorption energy follows Beer's law. The analysis
results of carbon content are directly displayed on the display as a percentage.
3 Reagents and materials
3.1 Oxygen. The purity is not less than 99.5%.
3.2 Desiccant. Anhydrous magnesium perchlorate with a particle size of 0.7 mm~1.2
mm.
3.3 Purifying agent. Soda asbestos with a particle size of 0.7 mm~1.2 mm.
3.4 Pure iron. The purity is greater than 99.8%, and the carbon content is less than
0.002%.
4 Instruments
The operating parameters of the instruments shall meet the following requirements.
5 Samples
5.1 Before use, the sample shall be dried in an oven at 110 °C±5 °C for 1 hour, then
taken out and stored in a desiccator.
6 Analysis steps
WARNING -- The hazards associated with combustion analysis are primarily pre-
fired porcelain crucibles and combustion during the melting process.
6.1 Specimen
Weigh 0.20 g of specimen, accurate to 0.0001 g.
6.2 Preparation before analysis
Before starting the instrument, use oxygen (3.1) to check the air tightness of the gas
path. The combustion chamber and filter shall be cleaned frequently. Regularly replace
the desiccant (3.2) and purifying agent (3.3) according to the requirements of the
instrument.
6.3 Blank test
Weigh 0.35 g of pure iron (3.4) and 2.0 g of tungsten particles (3.5) and place them in
a porcelain crucible (3.6). Measure them in the same range or channel according to 6.5.
Repeat the measurement until the reading is stable. Record the smallest, relatively stable
and consistent three readings, calculate the average value, and enter it into the
instrument. The instrument will automatically deduct the blank value when measuring
the specimen.
6.5 Determination
6.5.1 Add 0.35 g of pure iron (3.4) to the porcelain crucible (3.6), place the crucible on
the electronic balance, and weigh it. Then, add the specimen (6.1) into the porcelain
crucible, weigh it, enter the mass of the specimen, and take it down. Add about 2.0 g of
tungsten particles (3.5) to cover the specimen, and move the porcelain crucible to the
crucible base.
7 Precision
7.1 Repeatability
The measured values of two independent test results obtained under repeatability
conditions are within the average value range given below; the absolute difference
between the two test results does not exceed the repeatability limit (r), the probability
of exceeding the repeatability limit (r) does not exceed 5%, and the repeatability limit
(r) is obtained by linear interpolation according to the data in Table 1.
8 Test report
The test report shall include the following content.
YS/T 1028.4-2015
YS
NONFERROUS INDUSTRY STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
ICS 77.120.99
H 71
Methods for chemical analysis of lithium iron phosphate -
Part 4.Determination of carbon content - High frequency
combustion with infrared absorption method
Issued on. APRIL 30, 2015
Implemented on. OCTOBER 1, 2015
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 3
1 Scope... 4
2 Method summary... 4
3 Reagents and materials... 4
4 Instruments... 5
5 Samples... 5
6 Analysis steps... 5
7 Precision... 6
8 Test report... 7
Foreword
YS/T 1028 Methods for chemical analysis of lithium iron phosphate consists of 5 parts.
-- Part 1.Determination of total iron content - Titanium trichloride reduction
potassium dichromate titration methods;
-- Part 2.Determination of lithium content - Flame photometry;
-- Part 3.Determination of phosphor content - Quinoline phosphomolybdate
gravimetry;
-- Part 4.Determination of carbon content - High frequency combustion with
infrared absorption method;
-- Part 5.Determination of calcium, magnesium, zinc, copper, lead, chromium,
sodium, aluminium, nickel, cobalt and manganese content - Inductively coupled
plasma atomic emission spectrometry
This part is Part 4 of YS/T 1028.
This part was drafted in accordance with the rules given in GB/T 1.1-2009.
This part was proposed and shall be under the jurisdiction of the National Technical
Committee on Nonferrous Metals of Standardization Administration of China
(SAC/TC243).
Drafting organizations of this part. Guangdong Brunp Recycling Technology Co., Ltd.,
Guangzhou Research Institute of Nonferrous Metals, Beijing General Research
Institute of Mining & Metallurgy.
Main drafters of this part. Li Changdong, Yu Haijun, Xie Yinghao, Zhang Xuemei,
Zhuang Aichun, Xiong Xiaoyan, Tang Weixue, Xu Xiaoyan, Feng Xianjin.
Methods for chemical analysis of lithium iron phosphate -
Part 4.Determination of carbon content - High frequency
combustion with infrared absorption method
1 Scope
This part of YS/T 1028 specifies the method for determining the carbon content in
lithium iron phosphate.
This part applies to the determination of carbon content in lithium iron phosphate.
Measuring range. 0.5%~5.0%.
2 Method summary
The sample and flux are put into a porcelain crucible and heated with a high-frequency
induction furnace in the oxygen flow. The carbon is burned to generate carbon dioxide,
which is carried by the oxygen to the infrared absorption cell. The change of carbon
dioxide concentration on infrared absorption energy follows Beer's law. The analysis
results of carbon content are directly displayed on the display as a percentage.
3 Reagents and materials
3.1 Oxygen. The purity is not less than 99.5%.
3.2 Desiccant. Anhydrous magnesium perchlorate with a particle size of 0.7 mm~1.2
mm.
3.3 Purifying agent. Soda asbestos with a particle size of 0.7 mm~1.2 mm.
3.4 Pure iron. The purity is greater than 99.8%, and the carbon content is less than
0.002%.
4 Instruments
The operating parameters of the instruments shall meet the following requirements.
5 Samples
5.1 Before use, the sample shall be dried in an oven at 110 °C±5 °C for 1 hour, then
taken out and stored in a desiccator.
6 Analysis steps
WARNING -- The hazards associated with combustion analysis are primarily pre-
fired porcelain crucibles and combustion during the melting process.
6.1 Specimen
Weigh 0.20 g of specimen, accurate to 0.0001 g.
6.2 Preparation before analysis
Before starting the instrument, use oxygen (3.1) to check the air tightness of the gas
path. The combustion chamber and filter shall be cleaned frequently. Regularly replace
the desiccant (3.2) and purifying agent (3.3) according to the requirements of the
instrument.
6.3 Blank test
Weigh 0.35 g of pure iron (3.4) and 2.0 g of tungsten particles (3.5) and place them in
a porcelain crucible (3.6). Measure them in the same range or channel according to 6.5.
Repeat the measurement until the reading is stable. Record the smallest, relatively stable
and consistent three readings, calculate the average value, and enter it into the
instrument. The instrument will automatically deduct the blank value when measuring
the specimen.
6.5 Determination
6.5.1 Add 0.35 g of pure iron (3.4) to the porcelain crucible (3.6), place the crucible on
the electronic balance, and weigh it. Then, add the specimen (6.1) into the porcelain
crucible, weigh it, enter the mass of the specimen, and take it down. Add about 2.0 g of
tungsten particles (3.5) to cover the specimen, and move the porcelain crucible to the
crucible base.
7 Precision
7.1 Repeatability
The measured values of two independent test results obtained under repeatability
conditions are within the average value range given below; the absolute difference
between the two test results does not exceed the repeatability limit (r), the probability
of exceeding the repeatability limit (r) does not exceed 5%, and the repeatability limit
(r) is obtained by linear interpolation according to the data in Table 1.
8 Test report
The test report shall include the following content.
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.
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Related Standards
YS/T 1028.1-2015 — Methods for chemical analysis of lithium iron phosphate. Part 1: Determination of total iron content. Titanium trichloride reduction potassium dichromate titration methods
YS/T 1028.2-2015 — Methods for chemical analysis of lithium iron phosphate. Part 2: Determination of lithium content. Flame photometry
YS/T 1028.5-2015 — Methods for chemical analysis of lithium iron phosphate. Part 5: Determination of calcium, magnesium, zinc, copper, lead, chromium, sodium, aluminium, nickel, cobalt, manganese content. Inductively coupled plasma atomic emission spectrometry
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