GB/T 6730.17-2014Iron ores - Determination of sulfur content - Combustion iodometric method (English PDF)
铁矿石 硫含量的测定 燃烧碘量法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 30, 2014
Implementation date
May 1, 2015
Scope
GB/T 6730.17-2014 is the English-translated version of 铁矿石 硫含量的测定 燃烧碘量法.
GB/T 6730.17-2014 is the Chinese standard "Iron ores - Determination of sulfur content - Combustion iodometric method". Its scope clause reads: GB/T 6730 This section specifies the determination of sulfur content in iron ore by combustion iodometric method.
This section applies to natural iron ore, iron ore measuring, sinter and pellets sulfur content. Measurement range (mass fraction). 0.0020% to 0.50%. Its clauses include reagents; instruments.
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Document preview — GB/T 6730.17-2014
National Standard of the People's Republic of China
- ICS
- 73.060.10
- Classification
- D 31
- Replacing
- GB/T 6730.17-1986
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 4 Reagents
- 5 Instruments
1 Scope
GB/T 6730 This section specifies the determination of sulfur content in iron ore by combustion iodometric method.
This section applies to natural iron ore, iron ore measuring, sinter and pellets sulfur content. Measurement range (mass fraction).
0.0020% to 0.50%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 6730.1 Method for analysis of chemical analysis of iron pre-dried sample preparation
GB/T 6730.3 chemical analysis of iron gravimetric method for the determination of hygroscopic moisture in analytical samples
GB/T 10322.1 iron ore sampling and sample preparation methods
Principle 3
The sample was mixed with tungsten trioxide, nitrogen as a carrier gas, heated at 1250 °C ± 20 °C high temperature furnace. The resulting sulfur dioxide
Gas with dilute hydrochloric acid solution containing potassium iodide and starch absorption, absorbed in the process of continuous precipitation with potassium iodate standard solution titration, by consuming
Volume of potassium iodate solution to calculate the sulfur content of the sample.
4 Reagents
Analysis Unless otherwise stated, use only reagents of recognized analytical grade and meet the two water GB/T 6682 regulations.
4.1
tungsten trioxide solids (less than 0.001% sulfur content). Tungsten trioxide should be heated at a temperature of pretreatment 2h 700 °C ± 20 °C, to reduce
Low blank value.
4.2
hydrochloric acid, 166.
4.3
potassium iodide solution, 30g/L.
4.4 starch solution, 20g/L
Weigh 2g starch, adding 10mL water to form a suspension, stirring was added 50mL boiling water, then was added 30mL
Saturated boric acid, 4 drops ~ 5 drops of hydrochloric acid (rho = 1.19g/mL), was cooled, was diluted to 100mL, and mix until the precipitate, supernatant used.
4.5
potassium iodate standard solution, 0.001042mol/L. Weigh 0.2230g advance at 105 °C ~ 110 °C bake 2h and placed in a desiccator
Cooled to room temperature reference reagent potassium iodate is dissolved in water and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL
Equivalent to 0.10mg sulfur.
5 Instruments
Combustion apparatus is shown in Figure 1. include.
a) 1 --- nitrogen cylinder (purity greater than 95%).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 6730.17
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 6730.17-2014 | Iron ores - Determination of sulfur content - Combustion iodometric method | current edition | Current |
| GB/T 6730.17-1986 | Iron ores - Determination of sulfur content - Combustion iodometric method | previous edition | Superseded |
This page sells the current edition, GB/T 6730.17-2014. Earlier editions are listed for reference only.
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