GB/T 6730.34-2017 English PDF

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GB/T 6730.34-2017: Iron ores -- Determination of tin content -- Pyrocatechol violet cetyl trimethylamine bromide spectrophotometric method
Status: Valid

GB/T 6730.34: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.34-2017	159	Add to Cart	3 days	Iron ores -- Determination of tin content -- Pyrocatechol violet cetyl trimethylamine bromide spectrophotometric method	Valid
GB/T 6730.34-1986	239	Add to Cart	3 days	Methods for chemical analysis of iron ores. The pyrocatechol violet-cetyl trimethylamine bromide photometric method for the determination of tin content	Obsolete

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Basic data

Standard ID: GB/T 6730.34-2017 (GB/T6730.34-2017)
Description (Translated English): Iron ores -- Determination of tin content -- Pyrocatechol violet cetyl trimethylamine bromide spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Word Count Estimation: 8,822
Date of Issue: 2017-09-07
Date of Implementation: 2018-06-01
Older Standard (superseded by this standard): GB/T 6730.34-1986
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 6730.34-2017: Iron ores -- Determination of tin content -- Pyrocatechol violet cetyl trimethylamine bromide 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 tin content - Pyrocatechol violet cetyl trimet hylamine bromide spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replacing GB/T 6730.34-1986 Determination of tin content in iron ore Catechol violet - Cetyltrimethylammonium bromide spectrophotometric method 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 34. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part Replaces GB/T 6730.34-1986 "Methods for chemical analysis of iron ores Catechin violet - cetyltrimethylammonium bromide Luminousness Determination of tin content, "This section compared with GB/T 6730.34-1986, in addition to editorial changes, the main technical changes are as follows. --- The standard name was changed to "determination of tin content of iron ore catechin violet - cetyltrimethyl ammonium bromide spectrophotometry"; --- Added "warning" "Normative references" and "test report" chapter and content; --- 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 part of the drafting unit.Ningbo Inspection and Quarantine Science and Technology Research Institute, Alashankou Exit Inspection and Quarantine, Metallurgical Industry Information Standards Institute. The main drafters of this section. Chen Hehai, Lu Xinming, Zhang Aizhen, Li Yulu, Ren Chunsheng, Ying Haisong, Chen Zibin, Fu Ran Ran, Liao Haiping, Wang Yan. This part replaces the standards previously issued as. --- GB/T 6730.34-1986. Determination of tin content in iron ore Catechol violet - Cetyltrimethylammonium bromide spectrophotometric method 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 catechol violet - cetyl trimethyl ammonium bromide spectrophotometric determination of tin content. This section applies to iron ore, iron ore, sinter and pellet Determination of tin content. Determination of the range (mass fraction) .0.005% ~ 0.200%.

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

Samples with hydrofluoric acid, nitric acid, sulfuric acid decomposition, insoluble residue with sodium peroxide melting. Distillation of tin in the form of stannic bromide and interfering elements Elemental separation, in the sulfuric acid - citric acid medium (pH1.3 ~ 1.7), tin and catechola violet, cetyltrimethyl ammonium bromide colored ternary Complex, measuring its absorbance at a wavelength of 660 nm, thereby measuring tin.

4 Reagents and materials

Unless otherwise indicated in the analysis, the use of only approved analytical reagent and in line with the provisions of GB/T 6682 more than three or with its purity phase When the water. 4.1 Sodium peroxide. 4.2 nitric acid, p about 1.42 g/mL. 4.3 hydrofluoric acid, p about 1.15 g/mL. 4.4 hydrobromic acid, p approximately 1.49 g/mL. 4.5 hydrogen peroxide, 30%. 4.6 sulfuric acid, 1 1. ......

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