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GB/T 4702.17-2016: Chromium metal -- Determination of oxygen, nitrogen and hydrogen content -- Inert gas fusion thermal infrared detection method and conductivity method
Status: Valid GB/T 4702.17: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4702.17-2016 | English | 119 |
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Chromium metal -- Determination of oxygen, nitrogen and hydrogen content -- Inert gas fusion thermal infrared detection method and conductivity method
| Valid |
GB/T 4702.17-2016
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| GB/T 4702.17-1988 | English | 199 |
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Methods for chemical analysis of chromium metal--The combustion-neutralization titration method for the determination of sulfur content
| Obsolete |
GB/T 4702.17-1988
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PDF similar to GB/T 4702.17-2016
Basic data | Standard ID | GB/T 4702.17-2016 (GB/T4702.17-2016) | | Description (Translated English) | Chromium metal -- Determination of oxygen, nitrogen and hydrogen content -- Inert gas fusion thermal infrared detection method and conductivity method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H11 | | Classification of International Standard | 77.100 | | Word Count Estimation | 6,677 | | Date of Issue | 2016-12-13 | | Date of Implementation | 2017-09-01 | | Regulation (derived from) | National Standard Announcement No.56 of 2016 | | 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 | GB/T 4702.17-2016: Chromium metal -- Determination of oxygen, nitrogen and hydrogen content -- Inert gas fusion thermal infrared detection method and conductivity method
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Chromium metal - Determination of oxygen, nitrogen and hydrogen content - Inert gas fusion thermal infrared detection method and yield method
ICS 77.100
H11
National Standards of People's Republic of China
Determination of chromium, nitrogen and hydrogen content of metals
Inert gas melt infrared absorption method and thermal conductivity method
Chromiummetal-Determination ofoxygen, nitrogenandhydrogencontent-
2016-12-13 released
2017-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
GB/T 4702 "metal chromium chemical analysis method" is divided into 16 parts.
- Part 1. Determination of chromium chromium content - Ammonium ferrous sulfate titration method
Part 2. Determination of chromium content in metallic materials - Perchloric acid gravimetric method
Part 3. Determination of chromium content in metals - Bismuth - phosphorus - molybdenum blue spectrophotometric method
- Part 4. Determination of metallic chromium content - Ethylenediamine tetraacetic acid disodium titration and flame atomic absorption spectrometry
- Part 5. Determination of metallic chromium content - Ethylenediamine tetraacetic acid disodium titration and flame atomic absorption spectrometry
- Part 6. Determination of metallic ferrochromium, aluminum, silicon and copper content - Inductively coupled plasma atomic emission spectrometric method
- Part 7. Determination of chromium content in metals - Distillation separation - Nessler reagent spectrophotometric method
- Part 8. Methods for chemical analysis of chromium metal - Distillation - molybdenum blue spectrophotometric method for the determination of arsenic content
Part 9. Methods for chemical analysis of metallic chromium - Determination of antimony content by crystal violet spectrophotometry
- Part 10. Methods for chemical analysis of metallic chromium - The copper reagent spectrophotometric method for the determination of copper content
- Part 11. Methods for chemical analysis of metallic chromium - Determination of tin content by alizarin violet spectrophotometry
- Part 12. Determination of chromium, nitrogen and hydrogen content of metals - Inhalation of inert gases - Infrared absorption method and thermal conductivity method
Part 13. Methods for chemical analysis of metallic chromium - The polarographic method for the determination of lead content
- Part 14. Methods for chemical analysis of metallic chromium - The infrared absorption method for the determination of carbon content
- Part 15. Determination of chromium, tin, bismuth, antimony and arsenic content of metallic chromium - Mass spectrometry
- Part 16. Determination of chromium content in metals - Infrared absorption method and combustion neutralization titration method
This part is part 12 of GB/T 4702.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part is made by China Iron and Steel Industry Association.
This section is under the jurisdiction of the National Technical Committee on Standardization of Pig Iron and Ferroalloys (SAC/TC318).
This part of the drafting unit. CITIC Jinzhou Metal Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this part. Jin Aidi, Yang Yuhong, Sun Xiaofei, Chen Zibin, Lu Chunsheng.
Determination of chromium, nitrogen and hydrogen content of metals
Inert gas melt infrared absorption method and thermal conductivity method
WARNING - Personnel using this section should have practical experience in formal laboratory work. This section does not indicate all possible security questions
It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.
1 Scope
This part of GB/T 4702 specifies the determination of oxygen content and hydrogen content by infrared method and the determination of nitrogen content by thermal conductivity method.
This part is applicable to the determination of oxygen content, nitrogen content and hydrogen content in metallic chromium. Determination of oxygen content (mass fraction). 0.010% ~
0.800%; nitrogen content of the determination of the range (mass fraction). 0.001% to 0.070%; hydrogen content of the determination of the range (mass fraction). 0.001%
0.050%.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 4010 Ferroalloy chemical analysis of the sample to take and preparation
GB/T 6682 Analytical laboratory water specifications and test methods
3 principle
The sample and the flux (nickel) were melted in a graphite crucible under an inert gas (He or Ar) in a pulsed electrode furnace to release oxygen
Gas, nitrogen, hydrogen. Oxygen and carbon to produce carbon monoxide or carbon dioxide, through the rare earth copper oxide after the carbon monoxide into dioxy
The carbon is charged by an inert gas into the carbon dioxide infrared detector, producing an electrical signal and with a known oxygen content of the metal chromium reference material
After the comparison of the electrical signal, so as to determine the oxygen content; and hydrogen through the rare earth copper oxide, the formation of water vapor, through the water infrared detector, lost
The electrical signal of the effluent, compared with the known hydrogen reference material/sample, gives the hydrogen content; the mixture of water and carbon dioxide passes through the gas
The cleaning agent is absorbed and the remaining nitrogen is charged to the thermal conductivity detector with the inert carrier gas, the detector outputs the electrical signal, the reference substance with the known nitrogen content /
After comparing the electrical signals of the samples, the nitrogen content is obtained.
4 reagents and materials
Unless otherwise stated, only the confirmed analytical reagent is used in the analysis, and the water used is distilled or deionized or substantially pure water,
Shall comply with the provisions of GB/T 6682 three or more water.
4.1 hydrochloric acid, analytical grade.
4.2 glacial acetic acid, analytical grade.
4.3 nitric acid, analytical grade.
4.4 Acetone, analytical grade.
4.5 nickel pickling solution, 75mL glacial acetic acid 25mL nitric acid 1.5mL hydrochloric acid.
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