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GB/T 4325.16-2013: Methods for chemical analysis of molybdenum -- Part 16: Determination of potassium content -- Flame atomic absorption spectrometry
Status: Valid GB/T 4325.16: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4325.16-2013 | English | 189 |
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Methods for chemical analysis of molybdenum -- Part 16: Determination of potassium content -- Flame atomic absorption spectrometry
| Valid |
GB/T 4325.16-2013
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| GB/T 4325.16-1984 | English | 199 |
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Methods for chemical analysis of molybdenum--The atomic absorption spectrophotometric method for the determination of magnesium content
| Obsolete |
GB/T 4325.16-1984
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PDF similar to GB/T 4325.16-2013
Basic data | Standard ID | GB/T 4325.16-2013 (GB/T4325.16-2013) | | Description (Translated English) | Methods for chemical analysis of molybdenum -- Part 16: Determination of potassium 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| H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 8,874 | | Older Standard (superseded by this standard) | GB/T 4325.18-1984 | | Regulation (derived from) | National Standards Bulletin 2013 No. 6 | | Issuing agency(ies) | General Administration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 molybdenum powder, molybdenum, molybdenum trioxide, and the amount of potassium molybdate method. This section applies to molybdenum powder, with molybdenum, molybdenum trioxide and ammonium potassium content. Measuring range: | GB/T 4325.16-2013: Methods for chemical analysis of molybdenum -- Part 16: Determination of potassium content -- Flame atomic absorption spectrometry
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for chemical analysis of molybdenum Part 16.. Determination of potassium content Flame atomic absorption spectrometry.
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4325.18-1984
Chemical analysis of molybdenum
Part 16. Determination of the amount of potassium
Flame Atomic Absorption Spectrometry
Part 16. Determinationofpotassiumcontent-
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 section GB/T Part of 164,325.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4325.18-1984 "chemical analysis of molybdenum atomic absorption spectrophotometric method for determination of potassium content." This portion
GB/T 4325.18-1984 compared to the main technical changes are as follows.
--- Original heating boil for about 1min 5.4.1.1 to 6.4.1 heated to boiling for about 10min;
--- Original 5.4.1,5.4.2 canceled;
--- Modify the curve;
--- Sample and blank sample was added an equal amount of molybdenum substrate;
--- Increased repeatability terms;
--- Increasing the test report.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section drafted by. China Molybdenum Group Co., Ltd., Beijing Nonferrous Metal Research Institute, Zhuzhou Cemented Carbide Group has
Limited.
The main drafters of this section. Chen Feng Group, Tian Yonghong, Lee Man Chi, Chengzi Hui, Huang He, easy Jianbo, Chen Fu chamber.
This part of the standard replaces the previous editions are.
--- GB/T 4325.18-1984.
Chemical analysis of molybdenum
Part 16. Determination of the amount of potassium
Flame Atomic Absorption Spectrometry
1 Scope
GB/T 4325 provisions of this part of the molybdenum powder, molybdenum, molybdenum trioxide and potassium determination of the amount of ammonium molybdate.
This section applies to powder, molybdenum, molybdenum trioxide and molybdenum determination of potassium content of ammonium molybdate. Measurement range. 0.0010% to 0.150%.
2 Method summary
Sample decomposition of hydrogen peroxide, cesium chloride as deionization agent, air - acetylene flame atomic absorption spectrometer, the wavelength 766.5nm
At measuring the absorbance of potassium in the matrix matching conditions, calculate the amount of potassium.
3 Reagents
Unless otherwise indicated, this part of the reagents used are in line with national standards or industry standards for gifted class pure reagents, the double-distilled water
Or equivalent purity, shall comply with GB/T 6682's.
3.1 Hydrogen peroxide (ρ = 1.10g/mL).
3.2 cesium chloride solution (25g/L).
3.3 molybdenum substrate. the nature of the sample application is basically the same, and potassium content of not more than 0.0003%.
3.4 Potassium standard stock solution. Weigh 0.1907g pre-calcined by 550 ℃ potassium chloride (wKCl≥99.9%), placed in a quartz beaker
In, dissolved in water and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 100μg potassium. Transferred to drying
Plastic bottle storage.
3.5 Potassium standard solution. Pipette 10.00mL potassium standard stock solution (3.4), placed in 100mL volumetric flask, dilute to the mark, mix
uniform. This solution 1mL containing 10μg potassium.
4 Instrument
Atomic absorption spectrometer, with a potassium hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
--- Characteristic concentration. in the solution was measured and consistent substrate solution, wherein the concentration of potassium is not more than 0.01μg/mL;
--- Precision. measure up to 10 times the standard solution, the absorbance of the standard deviation should not exceed the average absorbance of 1.0%; the lowest
Concentration of standard solution (not "zero concentration" standard solution) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum concentration standard
The average absorbance of standard solution of 0.5%;
--- Linear curve. the curve according to concentration, is divided into five sections, the difference between the absorbance of the absorbance difference between the highest and the lowest segment of the segment
Ratio of not less than 0.7.
5 Sample
Molybdenum should smash through the 0.75mm standard sieve.
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