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GB/T 6730.27-2017: Iron ores -- Determination of fluorine content -- Lanthanum-alizarin complexion spectrophotometric method
Status: Valid GB/T 6730.27: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6730.27-2017 | English | 199 |
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Iron ores -- Determination of fluorine content -- Lanthanum-alizarin complexion spectrophotometric method
| Valid |
GB/T 6730.27-2017
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| GB/T 6730.27-1986 | English | 199 |
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Methods for chemical analysis of iron ores. The lanthanum-alizarin complexon photometric method for the determination of fluorine content
| Obsolete |
GB/T 6730.27-1986
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PDF similar to GB/T 6730.27-2017
Basic data | Standard ID | GB/T 6730.27-2017 (GB/T6730.27-2017) | | Description (Translated English) | Iron ores -- Determination of fluorine content -- Lanthanum-alizarin complexion spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 10,119 | | Date of Issue | 2017-07-31 | | Date of Implementation | 2018-04-01 | | 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 6730.27-2017: Iron ores -- Determination of fluorine content -- Lanthanum-alizarin complexion spectrophotometric method
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Iron ores - Determination of fluorine content - Lanthanum-alizarin complexion spectrophotometric method
ICS 73.060.10
D31
National Standards of People's Republic of China
Replacing GB/T 6730.27-1986
Iron ores - Determination of fluorine content
Lanthanum - Alizarin Complex Hydrazone Spectrophotometry
2017-07-31 Posted
2018-04-01 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 27.
This section drafted according to GB/T 1.1-2009 given rules.
This Part replaces GB/T 6730.27-1986 "chemical analysis of iron ores - lanthanum - alizarin complex hydrazone spectrophotometric determination of fluorine," the Department
Sub-GB/T 6730.27-1986 compared to some editorial changes in addition to the main technical changes are as follows.
--- Standard name was changed to "determination of iron content of iron ores lanthanum - alizarin complex hydrazone spectrophotometry";
--- Added "warning" "range" "normative references" "equipment" "test report" chapter and content, the original chapter number corresponding
change;
--- Clear and standardized sample and sample preparation of the specific requirements;
--- Standard "sample size" revised to "sample volume", and clear the weighing accuracy;
--- Removed the original (1) of the coefficient "K" and "K" of the statement;
--- Table 1 to delete the "standard deviation allowed" one column, and "allowable difference" included in Chapter 8 "Results Calculation and its representation."
--- "Analysis of the acceptance" was revised to "determine the results of the analysis," the content has been modified accordingly.
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 part of the drafting unit. Ningbo Inspection and Quarantine Science and Technology Research Institute, Anshan Iron and Steel Group Mining Co., Ltd.
The main drafters of this section. Liu Yongfeng, Wang Yan, Chen Hehai, Rong Defu, Zhang Feng, Cui Xiaoning, Qiu Zhijun, Zhang Jiawen.
This part replaces the standards previously issued as.
--- GB/T 6730.27-1986.
Iron ores - Determination of fluorine content
Lanthanum - Alizarin Complex Hydrazone 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 part of the lanthanum - alizarin complex hydrazone spectrophotometric determination of fluorine content.
This section applies to the determination of natural iron ore, iron ore, sinter and pellet fluoride content. Measurement range (mass fraction).
0.10% to 3.00%.
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
Sample with perchloric acid and phosphoric acid at 130 ℃ ~ 140 ℃ by steam distillation, the fluorine and the coexisting element separation, take part of the distillate, in the C
Ketone medium, at pH 4.7 ~ 4.9, the fluorine and lanthanum-alizarin complex hydrazone chelate generated blue ternary complex, in a spectrophotometer
Absorbance was measured at 620 nm. With this determination of fluorine content.
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 three distilled water or its
The purity of water.
4.1 Sodium peroxide.
4.2 perchloric acid, ρ about 1.67g/mL.
4.3 Phosphoric acid, p about 1.70 g/mL.
4.4 acetone.
4.5 potassium permanganate solution, 40g/L.
4.6 sodium hydroxide solution, 20g/L.
4.7 acetic acid, 18.
4.8 acetic acid - sodium acetate buffer solution, pH4.0 ~ 4.2. Weigh 60g crystalline sodium acetate [CH3COONa · 3H2O] dissolved in water, added
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