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GB/T 7731.9-2008: Ferrotungsten -- Determination of bismuth content -- The bismuth iodide photometric method and inductively coupled plasma atomic emission spectrometry
Status: Valid GB/T 7731.9: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7731.9-2008 | English | 229 |
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Ferrotungsten -- Determination of bismuth content -- The bismuth iodide photometric method and inductively coupled plasma atomic emission spectrometry
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GB/T 7731.9-2008
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| GB/T 7731.9-1987 | English | 199 |
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Methods for chemical analysis of ferrotungrten--The bismuth iodide photometric method for the determination of bismuth content
| Obsolete |
GB/T 7731.9-1987
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PDF similar to GB/T 7731.9-2008
Basic data | Standard ID | GB/T 7731.9-2008 (GB/T7731.9-2008) | | Description (Translated English) | Ferrotungsten -- Determination of bismuth content -- The bismuth iodide photometric method and inductively coupled plasma atomic emission spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H11 | | Classification of International Standard | 77.100 | | Word Count Estimation | 10,191 | | Date of Issue | 2008-08-19 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 7731.9-1987 | | Quoted Standard | GB/T 4010 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | 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 determination of tungsten, bismuth iron content of bismuth iodide spectrometry method and inductively coupled plasma atomic emission. This section applies to the determination of tungsten, bismuth iron content. Spectrophotometric determination of bismuth iodide range (mass fraction): 0. 010 %-0. 060%, inductively coupled plasma atomic emission spectrometry range (mass fraction): 0. 010% to 0. 15 %. | GB/T 7731.9-2008: Ferrotungsten -- Determination of bismuth content -- The bismuth iodide photometric method and inductively coupled plasma atomic emission spectrometry
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Ferrotungsten. Determination of bismuth content. The bismuth iodide photometric method and inductively coupled plasma. Atomic emission spectrometry
ICS 77.100
H11
National Standards of People's Republic of China
Replacing GB/T 7731.9-1987
Determination of tungsten content of bismuth iron
Bismuth iodide photometric method and inductively coupled plasma
Atomic Emission Spectrometry
Posted 2008-08-19
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 7731 in this part is to GB/T 7731.9-1987 "tungsten iron chemical analysis of bismuth iodide photometric method for determination of bismuth content" of
Amended to include the two methods bismuth iodide photometric method and inductively coupled plasma atomic emission spectrometry.
This Part replaces GB/T 7731.9-1987.
This portion of the GB/T 7731.9-1987 comparison, the main changes are as follows.
--- Standard text bismuth iodide photometric method for the preparation of a standardized format;
--- Increased by inductively coupled plasma atomic emission spectrometry.
Appendix A of this section is an informative annex.
This part is proposed by the China Iron and Steel Association.
This part of pig iron and ferroalloy by the National Standardization Technical Committee.
This section is drafted. Sinosteel Jilin Ferroalloy Co., Ltd.
The main drafters of this section. phosphorus, copper, Zhang Yunpeng, Wu Liyu, Yuan winter snows.
This part of the standard replaces the previous editions are.
--- GB/T 7731.9-1987.
Determination of tungsten content of bismuth iron
Bismuth iodide photometric method and inductively coupled plasma
Atomic Emission Spectrometry
Warning. Use of practical experience GB/T 7731 this part of the staff should have regular laboratory work. This section does not indicate all available
Energy security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
GB/T 7731 This section specifies the spectrophotometric determination of tungsten and iron by inductively coupled plasma atomic emission spectrometry with bismuth iodide
Bismuth content.
This section applies to the determination of tungsten in the iron content of bismuth. Bismuth iodide spectrophotometric measurement range (mass fraction). 0.010% - 0.060%; electricity
Inductively coupled plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.15%.
2 Normative references
The following documents contain provisions which, through reference to GB/T 7731 to the present, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 4010 alloy chemical analysis and preparation of samples
3 Method One. bismuth iodide photometric method
3.1 Principle
Sample with nitric acid, hydrofluoric acid decomposition, white smoke treated with sulfuric acid, tartaric acid in sulfuric acid solution containing the hydrogen sulfide, so that bismuth and copper, tin
And other co-precipitation, then potassium sulfide treatment, the bismuth and copper, tin and other separation. Burning oxide, nitric acid is dissolved in the presence of ammonium ferric sulfate, hydrogen
The co-precipitation of ammonium bismuth oxide is separated, dissolved in sulfuric acid, potassium iodide and sodium hypophosphite make bismuth hair color, measured at 450nm wavelength
Absorbance. Low amount of bismuth to isoamyl alcohol extraction, the organic phase was measured absorbance at 450nm wavelength.
3.2 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water.
3.2.1 tartaric, solid.
3.2.2 hydrofluoric acid, ρ1.12g/mL.
3.2.3 nitric acid, 1 + 1.
3.2.4 sulfate, 1 + 1.
3.2.5 sulfate, 100 + 1.
3.2.6 Ammonium hydroxide, 1 + 1.
3.2.7 copper sulfate (CuSO4 · 5H2O) solution, 2g/L.
3.2.8 hydrogen sulfide, ferrous sulfide and dilute hydrochloric acid occurs Kipp generator reaction.
3.2.9 sodium hypophosphite solution, 250g/L.
3.2.10 potassium iodide solution, 100g/L.
High-speed rail 3.2.11 ammonium sulfate solution, 10g/L. Weigh 1g ammonium ferric sulfate [Fe2 (SO4) 3 (NH4) 2SO4 · 24H2O], dissolved in water,
Diluted 100mL, and mix.
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