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GB/T 4325.23-2013: Methods for chemical analysis of molybdenum -- Part 23: Determination of oxygen and nitrogen contents -- Inert gas fusion-infrared absorption and thermal conductivity method
Status: Valid GB/T 4325.23: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4325.23-2013 | English | 169 |
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Methods for chemical analysis of molybdenum -- Part 23: Determination of oxygen and nitrogen contents -- Inert gas fusion-infrared absorption and thermal conductivity method
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GB/T 4325.23-2013
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| GB/T 4325.23-1984 | English | 199 |
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Methods for chemical analysis of molybdenum--The combustion-conductometric titration method for the determination of sulphur content
| Obsolete |
GB/T 4325.23-1984
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PDF similar to GB/T 4325.23-2013
Basic data | Standard ID | GB/T 4325.23-2013 (GB/T4325.23-2013) | | Description (Translated English) | Methods for chemical analysis of molybdenum -- Part 23: Determination of oxygen and nitrogen contents -- Inert gas fusion-infrared absorption and thermal conductivity method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 7,718 | | Older Standard (superseded by this standard) | GB/T 4325.25-1984; GB/T 4325.26-1984 | | Regulation (derived from) | National Standards Bulletin 2013 No. 6 | | Issuing agency(ies) |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 inert gas fusion infrared absorption method Simultaneous determination of thermal conductivity of molybdenum in oxygen and nitrogen. This section applies to molybdenum oxygen and nitrogen content. Measuring range: 0. 000 5% oxy | GB/T 4325.23-2013: Methods for chemical analysis of molybdenum -- Part 23: Determination of oxygen and nitrogen contents -- Inert gas fusion-infrared absorption and thermal conductivity method
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Methods for chemical analysis of molybdenum Part 23. Determination of oxygen and nitrogen contents Inert gas fusion-infrared absorption and thermal conductivity method
ICS 77.120.99
H63
National Standards of People's Republic of China
Replacing GB/T 4325.25-1984, GB/T 4325.26-1984
Chemical analysis of molybdenum
Part 23. Determination of the oxygen and nitrogen
Inert gas fusion infrared absorption method - thermal conductivity method
Part 23. Determinationofoxygenandnitrogencontents-
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 4325 the first part 23.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 4325.25-1984 "chemical analysis of molybdenum inert gas fusion - coulometric titration method for the determination of oxygen" and
GB/T 4325.26-1984 "spectrophotometric determination of nitrogen chemical analysis of molybdenum Nessler reagent." This portion of the GB/T 4325.25-1984
And GB/T 4325.26-1984 compared to the main technical changes are as follows.
--- The method for the determination of oxygen by the "inert gas fusion coulometric titration method" with "the inert gas fusion infrared detection method";
--- The method for the determination of nitrogen by the "Nessler reagent photometric method" with "the inert gas fusion thermal conductivity detection red";
--- Using the method of molybdenum in oxygen and nitrogen simultaneous determination;
--- Increasing the test report.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Northwest Nonferrous Metal Research Institute, Guangzhou Nonferrous Metal Research Institute, Jinduicheng Molybdenum Industry Co., Ltd., Luoyang Luanchuan
Molybdenum Co., Ltd..
The main drafters of this section. Bo, Wang Hui, a new layer of stone, Zheng, Zhuang Yichun, Xie Mingming, Chen Feng group, high Xiaoli, Xiao new, Ren Yi Qi,
Li Hong, Han Li.
This part of the standard replaces the previous editions are.
--- GB/T 4325.25-1984, GB/T 4325.26-1984.
Chemical analysis of molybdenum
Part 23. Determination of the oxygen and nitrogen
Inert gas fusion infrared absorption method - thermal conductivity method
1 Scope
GB/T 4325 provisions of this part of the inert gas fusion infrared absorption method - thermal conductivity method for simultaneous determination of molybdenum in the amount of oxygen and nitrogen.
This section applies to the determination of molybdenum in the oxygen and nitrogen content. Measurement range. 0.0005% to 1.00% oxygen; nitrogen 0.0005% to 0.020%.
2 Method summary
A sample with a flux added graphite crucible, heated and melted in an inert gas (helium) is protected, and wherein the oxygen to form carbon crucible
CO, nitrogen is released in the form of N2. CO is partially oxidized to CO2, CO2 and CO along with the rest of the carrier gas flow entering an infrared detector, the detector
The output signal of the computing system based on the oxygen content of the sample mass calculation, the results are displayed in percentage. Gas path of CO, CO2 is absorbed respectively
Isolated, with the remaining nitrogen carrier gas (helium) into the thermal conductivity detector, the detector output signal computing system calculates the nitrogen content of the sample based on quality, knot
Results are shown in percentages.
3 Reagents and materials
3.1 acetone.
3.2 graphite crucible. pure spectrum.
3.3 Nickel bag (thickness ≤0.05mm, wO≤0.001%, wN≤0.00008%).
3.4 Nickel basket (wO≤0.0005%, wN≤0.00005%).
3.5 magnesium perchlorate.
3.6 alkali asbestos.
3.7 rare earth copper oxide.
3.8 copper wire.
Helium 3.9, the volume fraction of not less than 99.99%.
3.10 Standards/Standard sample. Material should be similar to the unknown sample and the oxygen/nitrogen content of the unknown sample is slightly higher than the oxygen/nitrogen content.
4 Instrument
4.1 inert gas fusion - infrared - thermal conductivity detection system comprises an electrode furnace, purification and analysis of a carrier gas stream conversion systems, carbon monoxide red
External carbon dioxide detector and infrared detector nitrogen thermal conductivity detector, computer and software control systems.
4.2 helium tank and regulator.
4.3 Balance. dividing the value of 0.1mg.
4.4 crucible tongs.
5 Sample
5.1 bulk sample on the grinding machine grinding its surface processed into a particle mass 0.05g ~ 0.08g, dried acetone, after removing the cold
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