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YS/T 226.7-2009: Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry
Status: Valid YS/T 226.7: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 226.7-2009 | English | 169 |
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Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry
| Valid |
YS/T 226.7-2009
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| YS/T 226.7-1994 | English | 199 |
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Determination of silicon content in selenium--Silicon-molybdenum blue photometric method
| Obsolete |
YS/T 226.7-1994
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PDF similar to YS/T 226.7-2009
Basic data | Standard ID | YS/T 226.7-2009 (YS/T226.7-2009) | | Description (Translated English) | Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H17 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,644 | | Date of Issue | 2009-12-04 | | Date of Implementation | 2010-06-01 | | Older Standard (superseded by this standard) | YS/T 226.11-1994 | | Regulation (derived from) | MIIT [2009] No. 66 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the amount of selenium in the determination of magnesium. This standard applies to the determination of selenium in the amount of magnesium. Measuring range: 0. 0002% to 0. 02%. | YS/T 226.7-2009: Methods for chemical analysis of selenium. Part 7: Determination of magnesium content. Flame atomic absorption spectrometry
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Methods for chemical analysis of selenium.Part 7. Determination of magnesium content.Flame atomic absorption spectrometry
ICS 77.120.99
H17
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 226.11-1994
Chemical analysis of selenium
Part 7. Determination of magnesium content
Flame Atomic Absorption Spectrometry
Posted 2009-12-04
2010-06-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 226 "selenium chemical analysis method" is divided into 13 parts.
--- Part 1. Determination of bismuth content - Hydride Generation - Atomic Fluorescence Spectrometry
--- Part 2. Determination of antimony content Hydride Generation - Atomic Fluorescence Spectrometry
--- Part 3. Determination of aluminum content Chromazurol S- cetylpyridinium bromide spectrophotometric method
--- Part 4. Determination of mercury content of dithizone - CTC colorimetric titration
--- Part 5. Determination of the amount of silicon silicon molybdenum blue spectrophotometry
--- Part 6. Determination of sulfur content symmetrical diphenyl semicarbazide spectrophotometry
--- Part 7. Determination of magnesium content - Flame atomic absorption spectrometry
--- Part 8. Determination of copper content - Flame atomic absorption spectrometry
--- Part 9. Determination of iron content by flame atomic absorption spectrometry
--- Part 10. Determination of nickel content by flame atomic absorption spectrometry
--- Part 11. Determination of lead content by flame atomic absorption spectrometry
--- Part 12. Determination of the amount of selenium sodium thiosulfate volumetric method
--- Part 13. silver, aluminum, arsenic, boron, mercury, bismuth, copper, cadmium, iron, gallium, indium, magnesium, nickel, lead, silicon, antimony, tin, tellurium, titanium, zinc contents
Inductively Coupled Plasma Mass Spectrometry
This section YS/T Section 7226 of.
The measured partial replacement of YS/T 226.11-1994 "selenium magnesium, copper, iron, nickel content - Flame atomic absorption spectrometric method" in the amount of magnesium
Given portion. Compared with YS/T 226.11-1994, this section has the following main changes.
--- Measurement by the scope of 0.0002% ~ 0.002% revised to 0.0002% to 0.02%;
--- Increased draw a calibration curve;
--- Supplementary terms of quality assurance and control;
--- Increase the repeatability limit, will be allowed to poor reproducibility limit.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Jinchuan Group Limited.
Participated in the drafting of this section. Beijing Nonferrous Metal Research Institute, Guangzhou Nonferrous Metal Research Institute.
The main drafters of this section. Zhang Zhi hair, dry Yong, Shi Jingjing, Lin Hsiu-ying, in Xiaoxia, Liu Hong, Gao Yan.
This part of the standard replaces the previous editions are.
--- GB 2120-1980;
--- YS/T 226.11-1994.
Chemical analysis of selenium
Part 7. Determination of magnesium content
Flame Atomic Absorption Spectrometry
1 Scope
This section YS/T 226 specifies the method for determination of selenium in magnesium content.
This section applies to the determination of selenium in magnesium content. Measurement range. 0.0002% to 0.02%.
2 Method summary
Sample decomposition with nitric acid at 320 ℃ volatile removing selenium, strontium salt added to eliminate the interference of coexisting elements, 3% hydrochloric acid medium, empty
Gas - acetylene flame magnesium were measured absorbance at the wavelength of 285.2nm, and calculate the amount of magnesium by working curve method.
3 Reagents
Unless otherwise indicated, the second part of the water are distilled water, reagents were pure class distinctions.
Nitrate 3.1 (ρ1.42g/mL).
3.2 hydrochloride (ρ1.19g/mL).
3.3 hydrochloric acid (1 + 2).
3.4 strontium solution (10g/L). Weigh 30.43g strontium chloride (excellent pure), placed in 250mL beaker, dissolved in water. Moved to 1000mL
Volumetric flask, dilute to the mark, shake.
3.5 Magnesium standard stock solution. Weigh 1.658g of magnesium oxide (high purity, at 800 ℃ after pre-ignition to constant weight in a desiccator and cooled to room
Temperature) was placed in 250mL beaker, add 20mL of nitric acid (3.1), after driving the acid smoke removed, washed with water and dish table Beibi, cool, moved
1000mL volumetric flask, constant volume of water, this solution 1mL containing 1mg magnesium.
3.5.1 Magnesium standard solution A. Pipette 5.00mL magnesium standard stock solution (3.5), placed 1000mL volumetric flask, dilute to the mark with water
Degree, shake. This solution 1mL containing 5μg magnesium.
3.5.2 Magnesium standard solution B. Pipette 25.00mL magnesium standard stock solution (3.5), placed 1000mL volumetric flask, dilute to the mark with water
Degree, shake. This solution 1mL containing 25μg magnesium.
4 Instrument
4.1 Atomic absorption spectrometer, with a magnesium hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
--- Characteristic concentration. the test solution is consistent with the measurement of the solution, characterized in magnesium concentration of not more than 0.01μg/mL.
--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%;
The lowest concentration of standard solution used (instead of "zero" standard solution) absorbance measured 10 times, and the standard deviation should not exceed the maximum concentration
0.5% of the mean absorbance of standard solution.
--- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment
Ratio of not less than 0.85.
Atomic absorption spectrometer operating conditions refer to Table 1.
Table 1 instrument conditions
Wavelength/nm lamp current/mA monochromator passband/nm observation height/mm flame type
285.2 5 0.2 8 stoichiometric flame
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