GB/T 15925-2010 English PDF

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GB/T 15925-2010: Method for chemical analysis of antimony ores -- Determination of antimony content
Status: Valid

GB/T 15925: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15925-2010	139	Add to Cart	3 days	Method for chemical analysis of antimony ores -- Determination of antimony content	Valid
GB/T 15925-1995	199	Add to Cart	2 days	Method for chemical analysis of antimony ores--Determination of antimony content--Cerimeteric titration	Obsolete

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Basic data

Standard ID: GB/T 15925-2010 (GB/T15925-2010)
Description (Translated English): Method for chemical analysis of antimony ores -- Determination of antimony content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D42
Classification of International Standard: 73.060
Word Count Estimation: 6,697
Date of Issue: 2010-11-10
Date of Implementation: 2011-02-01
Older Standard (superseded by this standard): GB/T 15925-1995
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 method for measuring the amount of antimony and antimony ores. This standard applies to the determination of the amount of antimony and antimony ores. Measurement range: 0. 5% antimony.

GB/T 15925-2010: Method for chemical analysis of antimony ores -- Determination of antimony content

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Method for chemical analysis of antimony ores. Determination of antimony content ICS 73.060 D42 National Standards of People's Republic of China Replacing GB/T 15925-1995 Methods for chemical analysis of antimony ores Determination of antimony 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 15925-1995 "Determination of antimony content of antimony ores chemical analysis of Cerium sulfate volumetric method." This standard compared with GB/T 15925-1995, the main changes are as follows. --- Modify the standard Chinese name; --- Increasing 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. 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 15925-1995. Methods for chemical analysis of antimony ores Determination of antimony 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 antimony ore antimony content. This standard applies to the determination of antimony content of antimony ore. Measurement range. more than 0.5% antimony.

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 decomposition with sulfuric acid, plus reducing agent Sb (Ⅴ) reduced to Sb (Ⅲ), in hydrochloric acid medium, methyl orange as indicator, with cerium sulfate Standard solution titration Antimony (Ⅲ) to cerium sulfate is reduced to antimony (Ⅴ), to calculate the amount of antimony.

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 potassium sulfate. 4.2 hydrazine sulfate. 4.3 sulfate (ρ1.85g/mL). 4.4 sulfate (892). Warning. When diluted improper operation could easily cause burns 4.5 hydrochloride [c (HCl) = 2.0mol/L]. 4.6 methyl orange solution (1g/L) (valid within one month, the end obviously). 4.7 standard ceric sulfate solution [c (Ce (SO4) 2 · 4H2O) = 0.05mol/L]. a) preparation. Weigh 20.2g of cerium sulfate, placed in 250mL beaker, 100mL heated with sulfuric acid (4.4) were dissolved, cooled, transferred to 1000mL Flask with sulfuric acid (4.4) diluted to the mark, shake; b) Calibration. Weigh 0.0500g ~ 0.1000g metal antimony (mass fraction ≥99.99%) in 250mL conical flask, add the amount Hydra Wet, add 15mL sulfuric acid (4.3), covered with a porcelain crucible lid thermal decomposition 0.5h, cooled, hydrochloric acid was added 100mL (4.5), and the solution was heated to boiling, drip 2 drops of methyl orange solution (4.6), constantly shaking immediately with cerium sulfate standard solution (4.7) titration until the solution red disappear shall end, while three calibration, according to equation (1) calculate the cerium sulfate standard solution factor f, Its poor value deviation is less than 0.4% is not met to be re-calibrated, the arithmetic mean, and at the same time a blank test. f = mV-V0 (1) ......

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