GB/T 6730.66-2009 English PDF

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GB/T 6730.66-2009: Iron ores -- Determination of total iron content -- Automatic potentiometric titration method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.66-2009	78	Add to Cart	1 days	Iron ores -- Determination of total iron content -- Automatic potentiometric titration method	Valid

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Basic data

Standard ID: GB/T 6730.66-2009 (GB/T6730.66-2009)
Description (Translated English): Iron ores -- Determination of total iron content -- Automatic potentiometric titration method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Classification of International Standard: 73.060.10
Word Count Estimation: 12,114
Date of Issue: 2009-10-30
Date of Implementation: 2010-05-01
Quoted Standard: GB/T 6682; GB/T 6730.1; GB/T 6730.3; GB/T 8170; GB/T 10322.1; GB/T 12806; GB/T 12808; JJG 814
Regulation (derived from): National Standard Approval Announcement 2009 No.12 (Total No.152)
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 method for the determination of total iron content in iron ore automatic potentiometric titration. This section applies to copper, vanadium, manganese content of less than 0. 1 % of the natural ore, iron ore concentrate and build blocks, including the determination of the sintered product of total iron content. Measurement range (mass fraction): 40% to 70%.

GB/T 6730.66-2009: Iron ores -- Determination of total iron content -- Automatic potentiometric titration method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Iron ores.Determination of total iron content.Automatic potentiometric titration method ICS 73.060.10 D31 National Standards of People's Republic of China Determination of total iron content of iron ore Automatic potentiometric titration Posted 2009-10-30 2010-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 6730 this part of Annexes A and B are normative appendix Appendix C is informative appendix. This part is proposed by the China Iron and Steel Association. This part of the National Standardization Technical Committee reduced iron ore and direct centralized. This part mainly drafted by. Ningbo Inspection and Quarantine Institute of Science and Technology, Baosteel, Metallurgical Industry Information Standards Institute, days Tianjin Entry-Exit Inspection and Quarantine Bureau, Shenzhen Entry-Exit Inspection and Quarantine Shanghai, China Wantong Technology Center, Shanghai Mettler the company. The main drafters of this section. should pine, Zhangai Zhen, Wang Yan, Ji Hongling, Chenzi Bin, Gu Songhai, Wanglou Ming, Li Chen. Determination of total iron content of iron ore Automatic potentiometric titration Warning. Use GB/T 6730 this part of the staff should have regular laboratory work experience. This section does not indicate all possible 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 6730 This section specifies the method for the determination of total iron content in iron ore by automatic potentiometric titration. This section applies to copper, vanadium, manganese content of less than 0.1% of the natural iron ore, iron ore and agglomeration, including total iron content in the sintered product Determination. Measurement range (mass fraction). 40% to 70%.

2 Normative references

The following documents contain provisions which, through reference to GB/T 6730 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 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 6730.1 Method for analysis of chemical analysis of iron pre-drying of the sample preparation (GB/T 6730.1-1986, idt ISO 7764.1998) GB/T 6730.3 gravimetric method for chemical analysis of iron absorption measurement and analysis of water samples GB/T 8170 repair value expressed about the rules and limit values and judgment GB/T 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, idt ISO 3082.1998) GB/T 12806 Laboratory glassware single marking flask (GB/T 12806-1991, neq ISO 1042. 1983) GB/T 12808 standard laboratory glassware single line pipette (GB/T 12808-1991, neq ISO 648.1997) JJG814 automatic potentiometric titrator Principle 3 Sample dissolved by heating with hydrochloric acid, stannous chloride reduction in the majority of iron, the remaining iron reduction with titanium trichloride with an excess of potassium dichromate oxidation reducing agent. Potassium dichromate as titrant titration reduced iron with an automatic potentiometric titrator titration endpoint titration and determination to consume potassium dichromate To calculate the volume of total iron content in the sample.

4 Reagents

Unless otherwise indicated, in the analysis using only reagents of recognized analytical grade. 4.1 potassium pyrophosphate, fine. 4.2 hydrochloride, ρ1.19g/mL. 4.3 sulfate, ρ1.84g/mL. 4.4 phosphoric acid, ρ1.70g/mL. 4.5 hydrofluoric acid, ρ1.13g/mL. 4.6 hydrogen peroxide solution, about 30%. 4.7 hydrogen peroxide solution, 1 + 9. ......

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