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Chemical analysis methods and determination of physical performance of synthetic cryolite. Part 14: X-ray fluorescence spectrometric method for the determination of elements content
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YS/T 273.14-2008
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Basic data | Standard ID | YS/T 273.14-2008 (YS/T273.14-2008) | | Description (Translated English) | Chemical analysis methods and determination of physical performance of synthetic cryolite. Part 14: X-ray fluorescence spectrometric method for the determination of elements content | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H30 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 8,849 | | Date of Issue | 2008-03-12 | | Date of Implementation | 2008-09-01 | | Regulation (derived from) | NDRC Notice No. 25 of 2008 | | Issuing agency(ies) | National Development and Reform Commission | | Summary | This standard specifies the cryolite fluorine, aluminum, sodium, silicon, iron, sulfur, phosphorus, calcium content (in F, Al, Na, SiO2, Fe2O3, SO42-, P2O5, CaO representation) measurement method. This standard applies to fluoride cryolite, aluminum, sodium, silicon, iron, sulfur, phosphorus, calcium content. Measuring range in Table 1. | YS/T 273.14-2008: Chemical analysis methods and determination of physical performance of synthetic cryolite. Part 14: X-ray fluorescence spectrometric method for the determination of elements content
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Chemical analysis methods and determination of physical performance of synthetic cryolite.Part 14. X-ray fluorescence spectrometric method for the determination of elements content
ICS 77.120.10
H30
People's Republic of China Nonferrous Metals Industry Standard
Determination of cryolite Chemical analysis methods and physical properties
Part 14. X-ray fluorescence spectrometry
Determination of element content
Posted 2008-03-12
2008-09-01 implementation
National Development and Reform Commission issued
Foreword
YS/T 273 "cryolite chemical analysis methods and determination of physical performance" is divided into 14 parts.
--- Part 1. Determination of the content of water in wet weight method;
--- Part 2. Determination of burning reductions;
--- Part 3. distillation - thorium nitrate volumetric method for the determination of fluorine content;
--- Part 4. Determination of aluminum content - EDTA volumetric method;
--- Part 5. Determination by flame atomic absorption spectrometry sodium content;
--- Part 6. molybdenum blue spectrophotometric determination of silicon dioxide content;
--- Part 7. phenanthroline spectrophotometric determination of ferric oxide content;
--- Part 8. Determination of sulfate content barium sulphate gravimetric method;
--- Part 9. molybdenum blue spectrophotometric determination of phosphorus pentoxide content;
--- Part 10. Determination of free weight alumina content;
--- Part 11. Determination of the sulfur content of X-ray fluorescence spectrometry;
--- Part 12. Flame atomic absorption spectrometric method for the determination of calcium oxide content;
--- Part 13. sample preparation and storage;
--- Part 14. Determination of Elements in X-ray fluorescence spectroscopy.
This is Part 14.
Appendix A of this section is an informative annex.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This part of the Aluminum Corporation of China Zhengzhou Research Institute, China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting.
This section is more fluoride Chemical Co., Ltd., Neimengguhuo coal Hongjun Aluminum Co., Ltd., Fujian Nanping Aluminium Company Limited
Division participated in the drafting.
The main drafters of this section. Zhangai Fen, Zhang North Korea, Mahui Xia, Xi Huan, Xu Jin Xue, Li Zhihui, Shiji Qin.
Determination of cryolite Chemical analysis methods and physical properties
Part 14. X-ray fluorescence spectrometry
Determination of element content
1 Scope
This section provides cryolite fluorine, aluminum, sodium, silicon, iron, sulfur, phosphorus, calcium content (F, Al, Na, SiO2, Fe2O3, SO2-4, P2O5,
CaO represented) measurement method.
This section applies to the determination of fluorine in cryolite, aluminum, sodium, silicon, iron, sulfur, phosphorus, calcium content. Determination of the range in Table 1.
Table 1
Component measuring range /%
F 40.00 ~ 60.00
Al 11.00 ~ 18.00
Na 20.00 ~ 35.00
SiO2 0.010 ~ 0.60
Component measuring range /%
Fe2O3 0.010 ~ 0.50
SO2-4 0.10 ~ 2.00
P2O5 0.0010 ~ 0.30
CaO 0.0060 ~ 1.00
2 principle of the method
Mixing the molten sample flux anhydrous lithium tetraborate and lithium metaborate, plus a small amount of lithium bromide (or iodide) as a release agent. In the melt prototype
Melted into glass samples. Measured by X-ray fluorescence spectrometer. Theoretical coefficient α or fundamental parameter calibration between the absorbent element -
Enhancement.
3 Reagents
3.1 anhydrous lithium tetraborate and lithium metaborate mixed flux [Li2B4O7 (67%) + LiBO2 (33%)]. at 700 ℃ burning 2h, dry place
Dryer saved.
3.2 remover. a saturated solution of lithium bromide or ammonium iodide solution (300g/L).
3.3 Sample Monitoring. Monitor sample should be stable glass, contains all the elements of calibration, so that its content should be less than the statistical error count rate
Or equal to the count rate calibration element statistical error.
4 Instrument
Platinum 4.1 - gold alloy crucible (95% Pt + 5% Au).
4.2 platinum - gold alloy casting (95% Pt + 5% Au). bottom mold material thickness of about 1mm, making it difficult to deformation.
Note. The sample vessel melt casting mold can be combined. If the sample in the crucible directly after melt molding, the bottom surface of the inner wall of the crucible is required smooth.
4.3 fusion machine. automatic flame melt melting prototype prototype or high-frequency inductors, if other types of prototype melting temperature not lower than 1100 ℃, and can be controlled
Temperature, temperature control accuracy of ± 15 ℃.
4.4 wavelength dispersive X-ray fluorescence spectrometer. end window rhodium anode X-ray tube.
5 Sample
The specimen shall conform YS/T 273.13 in 3.3 requirements.
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