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GB/T 6730.7-2016 English PDF

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GB/T 6730.7-2016: Iron ores -- Determination of metallic iron content -- Sulfosalicylic acid spectrophotometric method
Status: Valid

GB/T 6730.7: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 6730.7-2016	English	199	Add to Cart	3 days [Need to translate]	Iron ores -- Determination of metallic iron content -- Sulfosalicylic acid spectrophotometric method	Valid	GB/T 6730.7-2016
GB/T 6730.7-1986	English	199	Add to Cart	2 days [Need to translate]	Methods for chemical analysis of iron ores. The sulfosalicylic acid photometric method for the determination of metallic iron content	Obsolete	GB/T 6730.7-1986

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Basic data

Standard ID	GB/T 6730.7-2016 (GB/T6730.7-2016)
Description (Translated English)	Iron ores -- Determination of metallic iron content -- Sulfosalicylic acid spectrophotometric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	D31
Classification of International Standard	73.060
Word Count Estimation	10,195
Date of Issue	2016-10-13
Date of Implementation	2017-09-01
Older Standard (superseded by this standard)	GB/T 6730.7-1986
Regulation (derived from)	National Standard Notice No.1716 of 2016
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 6730.7-2016: Iron ores -- Determination of metallic iron content -- Sulfosalicylic acid spectrophotometric 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 metallic iron content - Sulfosalicylic acid spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replacing GB/T 6730.7-1986 Determination of iron content of iron ore Sulfosalicylic acid spectrophotometric method Ironores-Determination ofmetalicironcontent-Sulfosalicylicacid 2016-10-13 released 2017-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

GB/T 6730 "iron ore" is divided into dozens of parts. This part is part 7 of GB/T 6730. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the GB/T 6730.7-1986 "iron ore chemical analysis method sulfosalicylic acid photometric determination of iron content." versus GB/T 6730.7-1986 compared to the editorial changes, the main technical changes are as follows. --- the name changed to "iron ore iron content determination of sulfosalicylic acid spectrophotometric method"; --- Added "warning" "normative reference document" "instrument" "test report" "Appendix B" and so on; --- modified the separation of non-magnetic material handling operations, from the external magnetic election to the magnetic separation; --- modified the measurement operation, remove the volume from 20.00mL to 10.00mL, constant volume from 100mL to 50mL, while Adjust the reagent dosage accordingly. This part is made by China Iron and Steel Industry Association. This section is headed by the National Commission on Standardization of Iron Ore and Direct Reductive Iron (SAC/TC317). This part of the main drafting unit. Changsha Mining and Metallurgy Research Institute limited liability company, Metallurgical Industry Information Standards Institute. The main drafters of this part. Fu Rao, Fu Zhao Di, Yu Xing, Yang Binghong, Zhang Yanli, Liu Zhida, Zeng Hao, Yang Lin, statements. This part of the previous version of the standard to replace the release of the situation. --- GB/T 6730.7-1986. Determination of iron content of iron ore Sulfosalicylic acid spectrophotometric method WARNING - Personnel using this section should have practical experience in formal laboratory work. This section does not indicate all possible security questions question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.

1 Scope

This part of GB/T 6730 specifies the determination of metallic iron content by sulfosalicylic acid spectrophotometry. This part is applicable to the determination of iron content in iron ore, iron concentrate, sinter and pellets. Measuring range (mass fraction). 0.020% to 0.300%.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 6682 Analytical laboratory water specifications and test methods Preparation of pre - drying samples for analysis of iron ore GB/T 6730.1 GB/T 6730.3 Methods for chemical analysis of iron ores - The gravimetric method for the determination of moisture content in samples Metallurgical products - Chemical analysis - Spectrophotometric methods Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170 GB/T 10322.1 Iron Ore Sampling and Sample Preparation GB/T 12806 laboratory glass instrument single standard line capacity bottle GB/T 12807 Laboratory glass instruments - Index pipettes GB/T 12808 Laboratory glass instruments Single line suction pipette

3 principle

After the sample is magnetized, it is stirred and leached with a high mercury-sodium salicylate ethanol solution to make the iron and other iron compounds And then the iron content was measured at a wavelength of 460 nm by sulfosalicylic acid photometry.

4 reagent

Unless otherwise stated, only the reagents identified as analytical reagents and those of Class 3 and Grade 3 in accordance with GB/T 6682 are used in the analysis. Water or deionized water or water equivalent to its purity. 4.1 Hydrochloric acid, 2 1. 4.2 Hydrogen peroxide, 1 9. 4.3 anhydrous ethanol. 4.4 high chloride - sodium salicylate mixed solution, weighing 2.5g of high chloride and 3g sodium salicylate dissolved in 100mL 95% ethanol. 4.5 sulfosalicylic acid solution, 100 g/L.

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