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GB/T 6730.37-2017: Iron ores -- Determination of cobalt content--4-[(5-chloro-2-pyridyl) azo]-1, 3-diamino-benzene spectrophotometric method
Status: Valid GB/T 6730.37: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6730.37-2017 | English | 199 |
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Iron ores -- Determination of cobalt content--4-[(5-chloro-2-pyridyl) azo]-1, 3-diamino-benzene spectrophotometric method
| Valid |
GB/T 6730.37-2017
|
| GB/T 6730.37-1986 | English | 199 |
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Methods for chemical analysis of iron ores. The 4-[(5-chloro-2-pyridyl)azo]-1, 3-diaminobenzene photometric method for the determination of cobalt content
| Obsolete |
GB/T 6730.37-1986
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PDF similar to GB/T 6730.37-2017
Basic data | Standard ID | GB/T 6730.37-2017 (GB/T6730.37-2017) | | Description (Translated English) | Iron ores -- Determination of cobalt content--4-[(5-chloro-2-pyridyl) azo]-1, 3-diamino-benzene spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 10,161 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | 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 6730.37-2017: Iron ores -- Determination of cobalt content--4-[(5-chloro-2-pyridyl) azo]-1, 3-diamino-benzene spectrophotometric method
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Iron ores - Determination of cobalt content - 4 - [(5-chloro-2-pyridyl) azo] -1,3-diamino-benzene spectrophotometric method
ICS 73.060.10
D31
National Standards of People's Republic of China
Replacing GB/T 6730.37-1986
Determination of cobalt content in iron ore 4 - [(5-chloro-2-pyridine)
Azo] -1,3-diaminobenzene spectrophotometry
Ironores-Determinationofcobaltcontent-4 - [(5-chloro-2-
pyridyl) azo] -1,3-diamino-benzenespectrophotometricmethod
2017-09-07 Posted
2018-06-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
GB/T 6730 "iron ore" is divided into dozens of sections.
This section GB/T 6730 Part 37.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 6730.37-1986 "Iron Ore Chemical Analysis Method 4 - [(5-chloro-2-pyridine) azo] -1,3-diaminobenzene light
Degree of determination of cobalt content, "This section compared with GB/T 6730.37-1986, in addition to editorial changes, the main technical changes are as follows.
--- Standard name was changed to "Determination of cobalt content of iron ore 4 - [(5-chloro-2-pyridyl) azo] -1,3-diaminobenzene spectrophotometry
law";
--- Added "warning" "normative references" "instrument" and "test report" chapter;
--- Clear and standardized sample and sample preparation of the specific requirements;
--- Standard "sample size" to "sample volume", and clear the weighing accuracy;
--- Deleted the coefficient (1) in the coefficient "K" and "K" statement.
This part is proposed by China Iron and Steel Association.
This part of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317) centralized.
This section is drafted by Ningbo Inspection and Quarantine Science and Technology Research Institute, Erenhot Inspection and Quarantine Bureau, Metallurgical Industry Information Standards Institute.
The main drafters of this section. Ren Chunsheng, Chen Hehai, Ningguo East, Huang Shijie, Liao Haiping, Yu Qing, Wang Yan, Fu Ran Ran, Chen Zhibin.
This part of the standard replaces the previous version of the release.
--- GB/T 6730.37-1986.
Determination of cobalt content in iron ore 4 - [(5-chloro-2-pyridine)
Azo] -1,3-diaminobenzene spectrophotometry
Warning --- personnel using this section should have formal laboratory work experience. This section does not indicate all possible safety issues
question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the requirements of the relevant state laws and regulations.
1 Scope
GB/T 6730 provisions of this section 4 - [(5-chloro-2-pyridyl) azo] -1,3-diaminobenzene spectrophotometric determination of cobalt content.
This section applies to the determination of cobalt content in iron ore, iron ore concentrate, sinter and pellet. Measurement range (mass fraction).
0.0050% ~ 0.10%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 6682 analytical laboratory water specifications and test methods
Preparation of pre-dried samples for analysis of iron ores GB/T 6730.1
GB/T 8170 rounded repair rules and limit values of the representation and judgment
GB/T 10322.1 Iron ore sampling and sample preparation methods
GB/T 12806 laboratory glassware single standard line capacity bottle
GB/T 12807 Laboratory glassware graduated pipette
GB/T 12808 laboratory glassware single standard pipette
3 principle
In pH 5 acetate media, cobalt and 5-Cl-PADAB form a red complex with a composition of 1. 2, which is converted to
Stable wine red complex. The absorbance is measured at a wavelength of 570 nm, whereby cobalt is measured.
Copper, nickel and iron also form colored complexes with 5-Cl-PADAB, the colored complex of copper and nickel is destroyed when heated in a boiling water bath,
The cobalt complex is not destroyed. A large number of iron interference, plus the solution before the developer, adding phosphoric acid and heated in a boiling water bath,
Can eliminate its influence.
4 Reagents and materials
Unless otherwise indicated in the analysis, the use of only approved analytical reagent and in line with GB/T 6682 more than two distilled water or purity
Quite water.
4.1 Sodium peroxide.
4.2 Hydrochloric acid, p approximately 1.19 g/mL.
Hydrochloric acid, 1 1.
Hydrochloric acid, 1 9.
4.5 Phosphoric acid, 15 85.
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