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GB/T 4325.14-2013: Methods for chemical analysis of molybdenum -- Part 14: Determination of magnesium content -- Flame atomic absorption spectrometry
Status: Valid GB/T 4325.14: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4325.14-2013 | English | 169 |
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Methods for chemical analysis of molybdenum -- Part 14: Determination of magnesium content -- Flame atomic absorption spectrometry
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GB/T 4325.14-2013
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| GB/T 4325.14-1984 | English | 199 |
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Methods for chemical analysis of molybdenum--The atomic absorption spectrophotometric method for the determination of calcium content
| Obsolete |
GB/T 4325.14-1984
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Basic data | Standard ID | GB/T 4325.14-2013 (GB/T4325.14-2013) | | Description (Translated English) | Methods for chemical analysis of molybdenum -- Part 14: Determination of magnesium content -- Flame atomic absorption spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 7,712 | | Older Standard (superseded by this standard) | GB/T 4325.15-1984; GB/T 4325.16-1984 | | Regulation (derived from) | National Standards Bulletin 2013 No. 6 | | Issuing agency(ies) |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 amount of molybdenum in the determination of magnesium. This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium magnesium content. Measuring range: 0. 0002% to 0. 010 % | GB/T 4325.14-2013: Methods for chemical analysis of molybdenum -- Part 14: Determination of magnesium content -- Flame atomic absorption spectrometry
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Methods for chemical analysis of molybdenum Part 14.. Determination of magnesium content Flame atomic absorption spectrometry.
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4325.15-1984, GB/T 4325.16-1984
Chemical analysis of molybdenum
Part 14. Determination of magnesium content
Flame Atomic Absorption Spectrometry
Part 14. Determinationofmagnesiumcontent-
Issued on. 2013-05-09
2014-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 4325 "chemical analysis of molybdenum" is divided into 26 parts.
--- Part 1. Determination of lead content - Graphite furnace atomic absorption spectrometry;
--- Part 2. Determination of cadmium content by flame atomic absorption spectrometry;
--- Part 3. Determination of bismuth content - atomic fluorescence spectrometry;
--- Part 4. Determination of tin content by atomic fluorescence spectrometry;
--- Part 5. Determination of antimony content - Atomic Fluorescence Spectrometry;
--- Part 6. Determination of arsenic content by atomic fluorescence spectrometry;
--- Part 7. Determination of the amount of iron phenanthroline spectrophotometry and inductively coupled plasma atomic emission spectrometry;
--- Part 8. Determination of cobalt content of cobalt reagents spectrophotometry and flame atomic absorption spectrometry;
--- Part 9. Determination of the amount of nickel dimethylglyoxime spectrophotometric method and the flame atomic absorption spectrometry;
--- Part 10. Determination of copper content - Flame atomic absorption spectrometry;
--- Part 11. Determination of aluminum content of chromium azure S spectrophotometry and inductively coupled plasma atomic emission spectrometry;
--- Part 12. silicon content - Inductively coupled plasma atomic emission spectrometry;
--- Part 13. Determination of calcium content by flame atomic absorption spectrometry;
--- Part 14. Determination of magnesium content - Flame atomic absorption spectrometry;
--- Part 15. Determination of sodium content by flame atomic absorption spectrometry;
--- Part 16. Determination of potassium content by flame atomic absorption spectrometry;
--- Part 17. Determination of titanium content of two methane antipyrine spectrophotometry and inductively coupled plasma atomic emission spectrometry;
--- Part 18. Determination of the amount of vanadium tantalum reagent spectrophotometry and inductively coupled plasma atomic emission spectrometry;
--- Part 19. Determination of chromium content of diphenyl carbon acid dihydrazide spectrophotometry;
--- Part 20. Determination of manganese content by flame atomic absorption spectrometry;
--- Part 21. Determination of the amount of carbon and sulfur content of the high-frequency combustion infrared absorption method;
--- Part 22. Determination of phosphorus content - Molybdenum blue spectrophotometric method;
--- Part 23. Determination of the oxygen and nitrogen inert gas fusion infrared absorption method - thermal conductivity method;
--- Part 24. Determination of tungsten content - Inductively coupled plasma atomic emission spectrometry;
--- Part 25. Determination of the amount of hydrogen in the inert gas fusion infrared absorption method/thermal conductivity method;
--- Part 26. aluminum, magnesium, calcium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, arsenic, cadmium, tin, antimony, tungsten, lead and bismuth content - Inductively coupled
Co-Plasma Mass Spectrometry.
This part is Part 14 GB/T 4325's.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4325.15 "chemical analysis of molybdenum Chlorophonazo Ⅰ spectrophotometric determination of magnesium content" and GB/T 4325.16-
1984 "chemical analysis of molybdenum by atomic absorption spectrophotometric determination of magnesium content." This portion of the GB/T 4325.15 and GB/T 4325.16-
Compared to 1984, the main technical changes are as follows.
--- Sample decomposition of nitric acid - hydrochloric acid mixture to hydrogen peroxide, hydrochloric acid;
--- Measurement range is adjusted to 0.0002% ~ 0.010%;
--- Increased repeatability terms;
--- Increased test reporting requirements.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Ganzhou Nonferrous Metallurgy Research Institute, Beijing Research Institute of Mining and Metallurgy, Western Metal Materials Co., Ltd.
The main drafters of this section. Li Zhiyong, Chen Tao, Zhong Daoguo, seeking Tao Jiang, Li Tuo Yang Jun red.
This part of the standard replaces the previous editions are.
--- GB/T 4325.15-1984, GB/T 4325.16-1984.
Chemical analysis of molybdenum
Part 14. Determination of magnesium content
Flame Atomic Absorption Spectrometry
1 Scope
GB/T 4325 provisions of this part of the determination of molybdenum in the amount of magnesium.
This section applies to molybdenum powder, molybdenum, molybdenum trioxide, ammonium molybdate determination of magnesium content. Measurement range. 0.0002% to 0.010%.
2 Method summary
Sample hydrogen peroxide decomposition. In hydrochloric acid medium, using standard addition method using air - acetylene flame atomic absorption spectrometer, the wavelength
285.2nm measured absorbance magnesium calculated amount of magnesium.
3 Reagents
Unless otherwise indicated, this part of the reagents used are in line with national standards or industry standard analytical reagent, the water is deionized water.
3.1 paramolybdate (wMg < 0.0001%).
3.2 Hydrogen peroxide (30%), pure class distinctions.
3.3 hydrochloric acid (ρ = 1.18g/mL), pure class distinctions.
3.4 citric acid solution (200g/L), pure class distinctions.
3.5 Magnesium standard stock solution. Weigh 0.1000g of magnesium (wMg≥99.99%) in 250mL beaker, add 30mL water,
10mL hydrochloric acid (3.3), heated until completely dissolved, and cooled to room temperature and transferred to 1000mL volumetric flask, dilute with water to volume, and mix.
This standard solution containing 100μg per milliliter of magnesium.
3.6 Magnesium Standard solution. Pipette 10.0mL standard stock solution of magnesium (3.5), placed in 500mL volumetric flask, was added 10mL of hydrochloric acid
(3.3), dilute to the mark and mix. This standard solution containing 2.0μg per milliliter of magnesium.
4 Instrument
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. In line with the measuring solution matrix solution features magnesium concentration should not exceed 0.01μg/mL;
--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed 1.5% of the average absorbance;
With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum
The average concentration of 0.5% absorbance;
--- Linear curve. the curve according to concentration, divided into five sections, the difference between the absorbance of the absorbance difference between the highest and the lowest segment segment
Ratio should not be less than 0.7.
5 Sample
Molybdenum should smash through the 0.75mm standard sieve.
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