GB/T 15924-2010 English PDF

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GB/T 15924-2010: Method for chemical analysis of tin ores -- Determination of tin content
Status: Valid

GB/T 15924: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15924-2010	139	Add to Cart	3 days	Method for chemical analysis of tin ores -- Determination of tin content	Valid
GB/T 15924-1995	239	Add to Cart	2 days	Method for chemical analysis of tin ores--Determination of tin content--Iodometric method	Obsolete

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Basic data

Standard ID: GB/T 15924-2010 (GB/T15924-2010)
Description (Translated English): Method for chemical analysis of tin ores -- Determination of tin content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D42
Classification of International Standard: 73.060
Word Count Estimation: 6,619
Date of Issue: 2010-11-10
Date of Implementation: 2011-02-01
Older Standard (superseded by this standard): GB/T 15924-1995
Quoted Standard: GB/T 6682
Regulation (derived from): National Standard Approval Announcement 2010 No.8 (Total No.163)
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 determination of the amount of tin ʯ����. This standard applies to the determination of the amount of tin ʯ����. Measuring range: less than 0. 2% tin.

GB/T 15924-2010: Method for chemical analysis of tin ores -- Determination of tin content

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Method for chemical analysis of tin ores. Determination of tin content ICS 73.060 D42 National Standards of People's Republic of China Replacing GB/T 15924-1995 Methods for chemical analysis of tin ores Determination of tin content Issued on. 2010-11-10 2011-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 15924-1995 "Methods for chemical analysis of tin ores iodometric method for the determination of tin content." This standard compared with GB/T 15924-1995, the main changes are as follows. --- Modify the standard Chinese name; --- Modify the standard English name; --- Increased alert, warning of the content; --- Increasing the purity of the reagents used and experimental water requirements; --- Increasing the particle size of the sample and drying requirements; --- Increased verification test content. Appendix A of this standard is an informative annex. The standard proposed by the People's Republic of China Ministry of Land Resources. This standard by the National Standardization Technical Committee of Land and Resources. This standard is drafted by. National Geological Experimental Test Center. This standard was drafted. Hubei Institute of Geology. The main drafters of this standard. Tangxing Min, a Liu Jian, Fang Jindong. This standard replaces the standards previously issued as follows. --- GB/T 15924-1995. Methods for chemical analysis of tin ores Determination of tin content Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out 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

This standard specifies the method for the determination of the amount of tin Shizhong Xi. This standard applies to the determination of the amount of tin Shizhong Xi. Measurement range. more than 0.2% tin.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Laboratory use specifications and test methods GB/T 6682 Analysis Principle 3 Sample molten sodium peroxide, to flooding, in hydrochloric acid medium, with aluminum tin (Ⅳ) reduction of tin (Ⅱ), with potassium iodate standard solution drops Fixed, calculate the amount of tin. When the interfering elements exceeds the allowable amount, to be taken Coprecipitation.

4 Reagents

Unless otherwise indicated in the analysis are consistent with the use of analytical reagents and GB/T 6682 water analytical laboratory. 4.1 sodium peroxide. 4.2 tartaric acid. 4.3 Aluminum foil (purity 99.5%), a thickness of 0.1mm. 4.4 marble (white, on examination without reducing substance). 4.5 hydrochloride (ρ1.19g/mL). 4.6 hydrochloride (11). 4.7 with saturated sodium bicarbonate solution. 4.8 EDTA (disodium ethylenediamine tetraacetate) solution (100g/L). edetate disodium was dissolved in 100g water 1000mL, drops Aqueous ammonia (4.9) until dissolved and the pH is checked and should be less than 10. 4.9 Ammonia (ρ0.8g/mL). 4.10 EDTA washes (5g/L). 5.0g disodium ethylenediaminetetraacetate were dissolved 1000mL water, the pH is adjusted to 9.5 with aqueous ammonia 9. 4.11 beryllium sulfate solution (100g/L). Weigh 10gBeSO4 · 4H2O dissolved in water, such as the need to filter turbidity, constant volume to 100mL, Shake well. 4.12 osmium solution (0.2g/L). Weigh 0.020g osmium tetroxide with sodium hydroxide (40g/L) were dissolved, add water to 100mL, Shake well. 4.13 tin standard stock solution. Weigh 1.0000g metal tin (mass fraction ≥99.99%), placed 1000mL volumetric flask. 200mL of hydrochloric acid (4.5), until completely dissolved (2 to 3 days), diluted with water to the mark. The concentration of the solution of tin ......

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