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GB/T 8704.8-2009: Ferrovanadium -- Determination of aluminium content -- The chrome azurol S spectrophotometric method and EDTA titrimetric method
Status: Valid GB/T 8704.8: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8704.8-2009 | English | 209 |
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Ferrovanadium -- Determination of aluminium content -- The chrome azurol S spectrophotometric method and EDTA titrimetric method
| Valid |
GB/T 8704.8-2009
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| GB/T 8704.8-1994 | English | 319 |
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Methods for chemical analysis of ferrovanadium. The chromazurol S photometric method and EDTA volumetric method for determination of aluminium comtent
| Obsolete |
GB/T 8704.8-1994
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PDF similar to GB/T 8704.8-2009
Basic data | Standard ID | GB/T 8704.8-2009 (GB/T8704.8-2009) | | Description (Translated English) | Ferrovanadium -- Determination of aluminium content -- The chrome azurol S spectrophotometric method and EDTA titrimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H11 | | Classification of International Standard | 77.100 | | Word Count Estimation | 9,928 | | Date of Issue | 2009-07-15 | | Date of Implementation | 2010-04-01 | | Older Standard (superseded by this standard) | GB/T 8704.8-1994 | | Quoted Standard | GB/T 4010 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.9 (Total No.149) | | 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 vanadium iron and aluminum content photometric titration with EDTA Chromazurol S splitting. This section applies to the determination of vanadium iron aluminum content. Chromazurol S spectrophotometric measurement range (mass fraction): 0. 10% ~ 0. 80%, EDTA titration range (mass fraction): 0. 50% to 3. 50 %. | GB/T 8704.8-2009: Ferrovanadium -- Determination of aluminium content -- The chrome azurol S spectrophotometric method and EDTA titrimetric method
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Ferrovanadium.Determination of aluminium content.The chromazurol S spectrophotometric method and EDTA titrimetric method
ICS 77.100
H11
National Standards of People's Republic of China
Replacing GB/T 8704.8-1994
Determination of vanadium content of Fe-Al
Chromium Azure S Spectrophotometry and EDTA titration
Posted 2009-07-15
2010-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This Part replaces GB/T 8704.8-1994 "Methods for chemical analysis of ferrovanadium chrome azure S photometric method and EDTA volumetric method for the determination
The amount of aluminum. "
This portion of the GB/T 8704.8-1994 comparison, the main changes are.
--- In the "Chromium Azure S Spectrophotometry" will be "accompanied by a blank solution in the sample as a reference" to "water as a reference."
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. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd.
The main drafters of this section. should Tang Hua, Fang Yan.
This part of the standard replaces the previous editions are.
--- GB/T 8704.8-1994.
Determination of vanadium content of Fe-Al
Chromium Azure S Spectrophotometry and EDTA titration
Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked
question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This section GB/T 8704 specifies the use Chromium Azure S Spectrophotometry and EDTA titration ferrovanadium aluminum content.
This section applies to the determination of vanadium iron aluminum content. Chromium Azure S Spectrophotometry range (mass fraction). 0.10% - 0.80%;
EDTA titration range (mass fraction). 0.50% to 3.50%.
2 Normative references
The following documents contain provisions cited by GB/T 8704 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. Chromium Azure S Spectrophotometry
3.1 Principle
Sample decomposition with nitric acid, sulfuric smoke, filtered, and the filtrate was saved shots. After ashing the residue with sulfuric acid and hydrofluoric acid to remove the oxide
Silicon, followed by potassium pyrosulfate melt, combined in the master bath. Then remove iron, vanadium and other impurity ions with CUPFERRON and chloroform extraction. By sulfur
Smoke acid, nitric acid treatment in the presence of hydroxylamine hydrochloride, with hexamethylenetetramine to adjust the pH, aluminum and chrome azure S form a colored complex matter,
550nm wavelength measured absorbance on a spectrophotometer. On the quality of the calibration curve Richard aluminum, aluminum in the sample is calculated
content.
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 coke potassium sulfate solid.
3.2.2 chloroform.
3.2.3 hydrofluoric acid, ρ1.15g/mL.
3.2.4 nitrate, ρ1.42g/mL.
3.2.5 nitric acid, 1 + 1.
3.2.6 sulfuric acid, 1 + 1.
3.2.7 sulfate, 1 + 60.
3.2.8 sulfuric acid, 1 + 200.
3.2.9 ammonia, 1 + 1, stored in a plastic bottle.
3.2.10 CUPFERRON solution, 60g/L, with the preparation, use filtered.
3.2.11 hexamethylenetetramine solution, 400g/L. Weigh 200g hexamethylenetetramine placed in 600mL beaker, add water 500mL
Dissolution, mixing, stored in plastic bottles.
3.2.12 hydroxylamine hydrochloride solution, 80g/L. Formulated with time.
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