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GB/T 12690.3-2015: Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 3: Determination of water content of rare earth oxides -- Gravimetric method
Status: Valid GB/T 12690.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12690.3-2015 | English | 89 |
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Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 3: Determination of water content of rare earth oxides -- Gravimetric method
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GB/T 12690.3-2015
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| GB/T 12690.3-2002 | English | 199 |
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Chemical analysis methods for non-RE impurity of rare earth metals and their oxides -- Determination of water content of rare earth oxides -- Gravimetric method
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GB/T 12690.3-2002
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| GB/T 12690.3-1990 | English | 199 |
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Cerium and cerium oxide--Determination of lanthanum oxide, praseodymium oxide, neodymium oxide, samarium oxide and yttrium oxide contents--Emission spectrographic method
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GB/T 12690.3-1990
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PDF similar to GB/T 12690.3-2015
Basic data | Standard ID | GB/T 12690.3-2015 (GB/T12690.3-2015) | | Description (Translated English) | Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 3: Determination of water content of rare earth oxides -- Gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 4,460 | | Date of Issue | 2015-09-11 | | Date of Implementation | 2016-04-01 | | Older Standard (superseded by this standard) | GB/T 12690.3-2002 | | Regulation (derived from) | National Standard Announcement 2015 No.25 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard specifies the method for determination of water content of rare earth oxides. This Standard applies to the determination of moisture content of rare earth oxides. Measuring range: 0.20% to 10.00%. | GB/T 12690.3-2015: Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 3: Determination of water content of rare earth oxides -- Gravimetric method
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(Non - rare earth impurities in rare earth metals and their oxides chemical analysis methods - Part 3. rare earth oxide in water content - Gravimetric method)
ICS 77.120.99
H14
National Standards of People's Republic of China
Replacing GB/T 12690.3-2002
Non - rare earth metals and their oxides
Methods for chemical analysis of impurities
Part 3. rare earth oxide in the amount of moisture determination
Gravimetric method
Part 3. Determinationofwatercontentofrareearthoxides-
Issued on. 2016-04-01 2015-09-11 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 12690 "non - rare earth impurities in rare earth metals and their oxides chemical analysis method" is divided into 18 parts.
--- Part 1. Carbon and sulfur content was measured high frequency - infrared absorption method;
--- Part 2. Rare Earth Oxides loss on ignition - Gravimetric method;
--- Part 3. rare earth oxide in water content - Gravimetric method;
--- Part 4. oxygen, nitrogen pulse measurement - infrared absorption method and pulse - heating thermal conductivity;
--- Part 5. Determination of inductance aluminum, chromium, manganese, iron, cobalt, nickel, copper, zinc, lead coupled plasma emission spectrometry;
Cobalt, manganese, lead, nickel, copper, zinc, aluminum, chromium was measured by inductively coupled plasma mass spectrometry;
--- Part 6. Determination of iron content of potassium thiocyanate, 1,10-phenanthroline spectrophotometry;
--- Part 7. Determination of silicon content - Molybdenum blue spectrophotometric method;
--- Part 8. Determination of sodium content by flame atomic absorption spectrometry;
--- Part 9. Determination of chlorine content of silver nitrate turbidimetry;
--- Part 10. Determination of phosphorus content - Molybdenum blue spectrophotometric method;
--- Part 11. Determination of magnesium content - Flame atomic absorption spectrometry;
--- Part 12. Determination of the amount of thorium;
--- Part 13. molybdenum, tungsten content was measured;
--- Part 14. Determination of titanium content;
--- Part 15. Determination of calcium;
--- Part 16. Determination of the amount of fluorine ion selective electrode;
--- Part 17. rare earth metals niobium, tantalum content of the determination;
--- Part 18. Determination of the amount of zirconium.
This section GB/T 12690 Part 3.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This part is GB/T 12690.3-2002 "non - rare earth impurities in rare earth metals and their oxides gravimetric method for determination of chemical analysis
The water content of rare earth oxides "revision. This standard compared with GB/T 12690.3-2002, major technical changes in addition to editorial changes outside
as follows.
--- Increasing the sample weight requirements of praseodymium oxide for 3g;
--- Reducing the measurement range from 0.20% to 20.00% to 0.20% - 10.00%;
--- Increased quality assurance and control (see Chapter 8).
This part of the National Standardization Technical Committee of rare earth (SAC/TC229) and focal points.
This section is responsible for drafting unit. Ganzhou Nonferrous Metallurgy Research Institute.
It participated in the drafting of this section. Qiandong Rare Earth Group Co., Ltd., will be the South China New Materials Resources Ltd., North China Rare Earth
(Group) Co., Ltd. high-tech.
The main drafters of this section. Lai Jian, Liu Hong, Zhu Ni, Zhang Suzhen, Zhang Zhong Ting, Gu Ji Han Kuang Jing, Lin Qing, Yao Nam Hung, Wang Shouhong.
This part of the standard replaces the previous editions are.
--- GB/T 12690.3-2002.
Non - rare earth metals and their oxides
Methods for chemical analysis of impurities
Part 3. rare earth oxide in the amount of moisture determination
Gravimetric method
1 Scope
GB/T 12690 provisions of this part of the determination of rare earth oxides in the amount of moisture.
This section applies to the determination of moisture content of rare earth oxides. Measuring range. 0.20% to 10.00%.
2 principle of the method
Sample at 105 ℃ ~ 110 ℃ heated to completely evaporate moisture. Calculate the amount of water from the difference between before and after drying quality.
3 instruments and equipment
3.1 weighing bottle. φ40mm, high 25mm.
3.2 Balance. dividing the value of 0.0001g.
3.3 oven. temperature > 110 ℃.
4 Sample
The sample should be sealed packaging, weighing immediately after opening.
Step 5 Analysis
5.1 Sample
In addition to praseodymium oxide sample Weigh 5.0g sample (Chapter 4), accurate to 0.0001g. Praseodymium oxide Weigh 3.0g sample (Chapter 4),
Accurate to 0.0001g.
5.2 Determination of the number of
Weigh two samples, parallel determination of the mean value.
5.3 Determination
5.3.1 The sample (5.1) into constant weight weighing bottle (3.1), the half openings in the oven at 105 ℃ ~ 110 ℃ heating 1h. take out
Weighing bottle, covered with lid, desiccator, cooled to room temperature, and weighed.
Repeat operations 5.3.2 5.3.1 until constant mass.
6 Calculation and presentation of analysis results
According to equation (1) to calculate the moisture content.
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