YS/T 575.14-2020_English: PDF (YS/T575.14-2020)
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YS/T 575.14-2020 | English | 239 |
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(Methods for chemical analysis of bauxite ores. Part 14: Determination of rare earth oxide content)
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YS/T 575.14-2020
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YS/T 575.14-2007 | English | 239 |
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Methods for chemical analysis of bauxite. Part 14: Determination the total content of rare earth oxide. Tribromo-arsenazo photometric method
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YS/T 575.14-2007
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YS/T 575.14-2006 | English | 239 |
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Methods for chemical analysis of bauxite. Determination the total content of rare earth oxide. Tribromo-arsenazo photometric method
| Obsolete |
YS/T 575.14-2006
|
Standard ID | YS/T 575.14-2020 (YS/T575.14-2020) | Description (Translated English) | (Methods for chemical analysis of bauxite ores. Part 14: Determination of rare earth oxide content) | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | Classification of Chinese Standard | H30 | Classification of International Standard | 71.100.10 | Word Count Estimation | 11,199 | Date of Issue | 2020-12-09 | Date of Implementation | 2021-04-01 | Older Standard (superseded by this standard) | YS/T 575.14-2007 | Drafting Organization | Ministry of Industry and Information Technology | Administrative Organization | Ministry of Industry and Information Technology | Regulation (derived from) | Ministry of Industry and Information Technology Announcement No. 48 [2020] | Proposing organization | Ministry of Industry and Information Technology | Issuing agency(ies) | Ministry of Industry and Information Technology | Standard ID | YS/T 575.14-2007 (YS/T575.14-2007) | Description (Translated English) | Methods for chemical analysis of bauxite. Part 14: Determination the total content of rare earth oxide. Tribromo-arsenazo photometric method | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | Classification of Chinese Standard | Q52 | Classification of International Standard | 71.100.10 | Word Count Estimation | 6,662 | Date of Issue | 2007-11-14 | Date of Implementation | 2008-05-01 | Older Standard (superseded by this standard) | YS/T 575.14-2006 | Drafting Organization | Zhengzhou Research Institute Aluminum Corporation of China | Administrative Organization | National Standardization Technical Committee of non-ferrous metals | Regulation (derived from) | NDRC Notice No. 77 of 2007 | Summary | This standard specifies the bauxite in the determination of total rare earth oxides. This standard applies to bauxite Determination of total rare earth oxides, measuring range: 0. 020% ~ 0. 300%. | Standard ID | YS/T 575.14-2006 (YS/T575.14-2006) | Description (Translated English) | Methods for chemical analysis of bauxite. Determination the total content of rare earth oxide. Tribromo-arsenazo photometric method | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | Classification of Chinese Standard | D42 | Classification of International Standard | 73.060 | Word Count Estimation | 6,644 | Date of Issue | 2006-07-27 | Date of Implementation | 2006-10-11 | Older Standard (superseded by this standard) | GB/T 3257.15-1999 | Regulation (derived from) | NDRC Notice No. 46 of 2006; NDRC Notice No. 77 of 2007 |
YS/T 575.14-2007
Methods for chemical analysis of bauxite.Part 14. Determination the total content of rare earth oxide.Tribromo-arsenazo photometric method
ICS 71.100.10
Q52
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 575.14-2006
Methods for chemical analysis of bauxite -
Part 14. Determination of total rare earth oxides
Tribromoarsenazo spectrophotometry
Posted 2007-11-14
2008-05-01 implementation
National Development and Reform Commission issued
Foreword
YS/T 575-2007 "chemical analysis of bauxite -" Is the YS/T 575-2006 (formerly GB/T 3257-1999) amendments
A total of 24 parts.
--- Part 1. aluminum oxide content - EDTA titration
--- Part 2. silica content - Gravimetric - molybdenum blue spectrophotometry
--- Part 3. Determination of silica content molybdenum blue photometric
--- Part 4. iron oxide content - Potassium dichromate titration
--- Part 5. Determination of iron oxide content phenanthroline spectrophotometry
--- Part 6. Determination of titanium dioxide content di Zhao DAM spectrophotometry
--- Part 7. calcium oxide content - Flame Atomic Absorption Spectrometry
--- Part 8. magnesium oxide content - Flame Atomic Absorption Spectrometry
--- Part 9. potassium hydroxide, sodium oxide content - Flame Atomic Absorption Spectrometry
--- Part 10. Determination of manganese oxide content by flame atomic absorption spectrometry
--- Part 11. chromium oxide content - Flame Atomic Absorption Spectrometry
--- Part 12. Determination of vanadium pentoxide content of benzoyl phenylhydroxylamine photometric method
--- Part 13. Determination of zinc content by flame atomic absorption spectrometry
--- Part 14. Determination of total rare earth oxide Tribromoarsenazo spectrophotometry
--- Part 15. Determination of gallium oxide content of rhodamine B extraction spectrophotometry
--- Part 16. Determination of phosphorus pentoxide molybdenum blue photometric
--- Part 17. Determination of sulfur content - Combustion - iodometric method
--- Part 18. Determination of total carbon content - Combustion - non-aqueous titration
--- Part 19. Determination of burning weight reduction method
--- Part 20. pre-dried sample preparation
--- Part 21. Determination of organic carbon titration
--- Part 22. Analysis of samples moisture intrudes content - Gravimetric method
--- Part 23. Determination of the chemical composition of the X-ray fluorescence spectrometry
--- Part 24. Determination of carbon and sulfur content infrared absorption method
This is Part 14.
The partial replacement of YS/T 575.14-2006 (formerly GB/T 3257.15-1999).
This section is amended to YS/T 575.14-2006, compared with YS/T 575.14-2006, the main changes are as follows.
--- The drying temperature of the sample unified 110 ℃ ± 5 ℃;
--- Increased precision.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This part of the Aluminum Corporation of China Zhengzhou Research Institute is responsible for drafting.
This section drafted by the Aluminum Corporation of China Henan Branch.
The main drafters of this section. Liang Qian, any joint venture, Lee spring tide, Huang Jian, ORTHOPAEDICS, Bai Wenjing.
The non-ferrous metal part by the National Standardization Technical Committee responsible for the interpretation.
This part of the standard replaces the previous editions are.
--- YS/T 575.14-2006 (formerly GB/T 3257.15-1999).
Methods for chemical analysis of bauxite -
Part 14. Determination of total rare earth oxides
Tribromoarsenazo spectrophotometry
1 Scope
This section specifies the determination method of bauxite in the total amount of rare earth oxides.
This section applies to the determination of total rare earth oxides in bauxite, the measurement range. 0.020% ~ 0.300%.
2 principle of the method
Sample with sodium hydroxide melt, melt a small amount of hot water extraction, and acidified with hydrochloric acid; then sodium hydroxide solution was adjusted to pH 2 ~
2.5 In sulfosalicylic acid and the presence of hydrogen peroxide, ferric complexed with EDTA, adding a certain amount of hydrochloric acid - sodium acetate buffer solution, tribromo
Arsenazo solution, respectively, at a wavelength of 639nm, 621nm, 652nm absorbance was measured at.
3 Reagents
3.1 sodium hydroxide, pure class distinctions.
3.2 perchloric acid, pure class distinctions.
3.3 Hydrogen peroxide.
3.4 Sodium hydroxide solution (100g/L).
3.5 HCl (1 + 1).
3.6 mixed indicator. Press cresol red and thymol blue 1.1 formulated.
Cresol red, 1g/L ethanol (1 + 1) solution; thymol blue, 1g/L ethanol (1 + 4) was added.
3.7 sulfosalicylic acid (40g/L). 20.0g said sulfosalicylic acid, 4.50g of sodium hydroxide in 300mL beaker with a small amount of water to dissolve
After transferred to 500mL volumetric flask, dilute to the mark with water. A pH of 2 to 2.5.
3.8 sodium ethylenediaminetetraacetate dihydrate (EDTA) solution (0.02mol/L).
3.9 hydrochloric acid - sodium acetate (0.5mol/L) buffer solution. Weigh 34.02gCH3COONa · 3H2O to 300mL beaker, with the amount of
Dissolved in water, adjusted to pH 2 with hydrochloric acid to 2.5, water volume in 500mL volumetric flask.
3.10 Tribromoarsenazo solution (0.5g/L).
3.11 matrix solution. Weigh 3.12gAlCl3 · 6H2O, 0.2gFeCl3 · 6H2O, 12.0g sodium hydroxide (3.1) in 250mL burn
Cup, add 60mL0.5mg/mL standard solution of titanium sulfate (1.11mol/L), dissolved in a small amount of water, was added 70mL of hydrochloric acid (3.5),
And into 1000mL volumetric flask, dilute to the mark, shake. 0.66mg aluminum oxide containing 1mL of this solution, 0.03mg two
Titanium oxide, 0.06mg ferric oxide.
3.12 single rare earth oxide standard solution.
3.12.1 accurately weighed 0.1000g dried at 120 ℃ has had various single rare earth oxide (99.99% La2O3, Nd2O3, Gd2O3,
Y2O3, etc.) in a 100mL beaker were added 80mL of hydrochloric acid (3.5), low dissolved by heating, cooled to room temperature, transferred to
1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL each containing 100μg single rare earth oxides.
3.12.2 accurately weighed 0.1000g dried at 120 ℃ has been ceria (99.99% CeO2) in 100mL beaker, add 5mL
Perchloric acid (3.2), low dissolved by heating, cooled to room temperature, 80mL of hydrochloric acid (3.5), and then transferred to 1000mL volumetric flask, dilute with water
Release to the mark. This solution 1mL containing 100μg ceria.
3.13 total rare earth oxide standard stock solution.
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