Search result: YS/T 575.7-2023 (YS/T 575.7-2007 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 575.7-2023 | English | 199 |
Add to Cart
|
3 days [Need to translate]
|
(Methods for chemical analysis of bauxite - Part 7: Determination of calcium oxide content Flame atomic absorption spectrometry)
| Valid |
YS/T 575.7-2023
|
| YS/T 575.7-2007 | English | 239 |
Add to Cart
|
3 days [Need to translate]
|
Methods for chemical analysis of bauxite. Part 7: Determination of calcium oxide content. Flame atomic absorption spectrophotometric method
| Obsolete |
YS/T 575.7-2007
|
| YS/T 575.7-2006 | English | 239 |
Add to Cart
|
2 days [Need to translate]
|
Methods for chemical analysis of bauxite. Determination of calcium oxide content. Flame atomic absorption spectrophotometric method
| Obsolete |
YS/T 575.7-2006
|
| Standard ID | YS/T 575.7-2023 (YS/T575.7-2023) | | Description (Translated English) | (Methods for chemical analysis of bauxite - Part 7: Determination of calcium oxide content Flame atomic absorption spectrometry) | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H30 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 9,912 | | Date of Issue | 2023-12-20 | | Date of Implementation | 2024-07-01 | | Summary | This standard specifies the method for determination of calcium oxide content in bauxite ore. This standard is applicable to the determination of calcium oxide content in bauxite ore. The measurement range is 0.060%~5.00%. |
YS/T 575.7-2007
Methods for chemical analysis of bauxite.Part 7. Determination of calcium oxide content.Flame atomic absorption spectrophotometric method
ICS 71.100.10
Q52
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 575.7-2006
Methods for chemical analysis of bauxite -
Determination of calcium oxide content. Part 7
Flame Atomic Absorption Spectrometry
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 7.
The partial replacement of YS/T 575.7-2006 (formerly GB/T 3257.7-1999).
This section is amended to YS/T 575.7-2006, compared with YS/T 575.7-2006, 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 Shandong Branch.
The main drafters of this section. Tian Rui, all red Tao.
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 575.7-2006 (formerly GB/T 3257.7-1999).
Methods for chemical analysis of bauxite -
Determination of calcium oxide content. Part 7
Flame Atomic Absorption Spectrometry
1 Scope
This section specifies the determination method of bauxite calcium oxide content.
This section applies to the determination of bauxite calcium oxide content. Measuring range. ≤5.00%.
2 Method summary
Sample Melt Alkali leaching, after acid decomposition, plus strontium salts do release, suppressing interference in atomic absorption spectrophotometer wavelength 422.7nm
At the air - acetylene flame measured calcium oxide.
3 Reagents
3.1 sodium hydroxide.
3.2 hydrochloride (ρ1.19g/mL).
3.3 HCl (1 + 1).
3.4 strontium chloride solution (150g/L), pure class distinctions.
3.5 calcium oxide standard stock solution. Weigh accurately 1.7857g baseline calcium carbonate (baking 1h stored at 110 ℃ oven dried and placed
It is cooled to room temperature) in 250mL beaker. Add 20mL water, was added dropwise hydrochloric acid (3.3) until completely dissolved, excess 10mL. Boil 3min
Get rid of carbon dioxide, cooled to room temperature. Moved into 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 1.0mg
Calcium Oxide.
Calcium oxide 3.6 standard solution. Pipette 50.00mL calcium oxide standard stock solution (3.5), placed 1000mL volumetric flask, diluted with water
To the mark, and mix. This solution 1mL containing 50μg calcium oxide.
4 Instrument
Atomic absorption spectrophotometer, with a calcium hollow cathode lamp.
The atomic absorption spectrophotometer should meet the following criteria.
Sensitivity. the absorbance of the highest concentration of the calibration curve moderately poor concentration of the standard should not be less than 0.3000.
Standard linear curve. five arithmetic concentration of the standard, the difference in absorbance between the highest and the second highest concentration of the standard should be not less than the minimum
0.8 times the concentration of the standard solution with zero concentration absorbance difference.
Minimum stability. The calibration curve of the highest concentration of the standard solution with a concentration of zero times the measured absorbance with respect to the highest concentration
Coefficient of variation of the mean absorbance value should be less than 1.5% and 0.5%, respectively.
5 Sample
The sample was ground with a mortar through 74μm sieve, the sample is placed in a good research at 110 ℃ ± 5 ℃ oven drying 2h, placed in a desiccator, cooled
But to room temperature before use.
Step 6 Analysis
6.1 Sample
Weigh 0.1g sample (5), accurate to 0.001g.
......
|