GB/T 11848.1-2008 English PDF

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GB/T 11848.1-2008: Methods for analysis of uranium ore concentrate -- Part 1: Determination of uranium by ferrous sulfate reduction potassium dichromate titrimetry
Status: Valid

GB/T 11848.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 11848.1-2008	189	Add to Cart	3 days	Methods for analysis of uranium ore concentrate -- Part 1: Determination of uranium by ferrous sulfate reduction potassium dichromate titrimetry	Valid
GB/T 11848.1-1989	199	Add to Cart	2 days	Determination of uranium in uranium ore concentrate by ferrous sulfate reduction potassium dichromate titrimatric method	Obsolete

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Basic data

Standard ID: GB/T 11848.1-2008 (GB/T11848.1-2008)
Description (Translated English): Methods for analysis of uranium ore concentrate -- Part 1: Determination of uranium by ferrous sulfate reduction potassium dichromate titrimetry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F46
Classification of International Standard: 27.120.30
Word Count Estimation: 8,828
Date of Issue: 2008-09-19
Date of Implementation: 2009-08-01
Older Standard (superseded by this standard): GB/T 11848.1-1989
Quoted Standard: GB/T 10268
Adopted Standard: ASTM C1267-2006, NEQ
Regulation (derived from): Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall)
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 uranium ore concentrate Determination of uranium principles, scope, use of reagents and instruments, analytical procedures, analytical results of calculation and precision of the method. This section applies to uranium ore concentrate Determination of uranium.

GB/T 11848.1-2008: Methods for analysis of uranium ore concentrate -- Part 1: Determination of uranium by ferrous sulfate reduction potassium dichromate titrimetry

---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.
Methods for analysis of uranium ore concentrate Part 1. Determination of uranium by ferrous sulfate reducion potassion dichromate titrimetry ICS 27.120.30 F46 National Standards of People's Republic of China Replacing GB/T 11848.1-1989 Analysis was uranium ore concentrate Part 1. Ferrous sulfate reduction - potassium dichromate Determination of Uranium Titration Posted 2009-08-01 2008-09-19 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 11848 "uranium ore concentrate analysis method" is expected to be divided into 16 sections. --- Part 1. ferrous sulfate reduction - Determination of uranium dichromate method; --- Part 2. Determination of nitric acid insoluble uranium; --- Part 3. Determination of extractable organic matter; --- Part 4. Determination of arsenic diethyl dithiocarbamate spectrophotometry; --- Part 5. Determination of non-aqueous titration carbonate; --- Part 6. Determination of fluoride ion selective electrode method; --- Part 7. Determination Volhard halogen; --- Part 8. Determination of weight loss at 110 ℃ water; --- Part 9. Determination of silicon gravimetric method; --- Part 10. combustion - iodometric method for the determination of sulfur; --- Part 11. Thorin spectrophotometric determination of thorium; --- Part 12. Determination of boron; --- Part 13. Potassium phenol orange spectrophotometric determination of zirconium; --- Part 14. Atomic absorption spectrometry determination of potassium and sodium; --- Part 15. Atomic absorption spectrometry determination of iron, calcium, magnesium, molybdenum, titanium, vanadium; --- Part 16. Determination of phosphorus. This section GB/T 11848 Part 1. This portion corresponds to ASTMC1267.2006 "Determination of uranium in uranium ore concentrate by ferrous sulfate reduction --- - dichromate Law ", and ASTMC1267.2006 is equivalent to the degree of non-conformity. This portion ASTMC1267. Compared to 2006, the main technical differences are as follows. --- Complements dissolving method; --- The automatic potentiometric titrator to potentiometric titration using conventional methods; --- Sampling of change. This Part replaces GB/T 11848.1-1989 "Determination of uranium in uranium ore concentrate by ferrous sulfate reduction - potassium dichromate titration." This section and GB/T 11848.1-1989 compared to the main differences are as follows. --- Sample to sample weight 4g 1g; --- The concentration of potassium dichromate representation and formulas as well as formulas uranium content has been modified; --- Increases the mass buoyancy correction data appendix. Appendix A of this section is an informative annex. This part is proposed by the China National Nuclear Corporation. This part of the National Standardization Technical Committee centralized nuclear energy. Drafting this Part. Nuclear Industry Beijing Research Institute of Chemical Engineering and Metallurgy. The main drafters of this section. Wu Wenbin, Wang Haisheng. This part replaces the standards previously issued as follows. --- GB/T 11848.1-1989. Analysis was uranium ore concentrate Part 1. Ferrous sulfate reduction - potassium dichromate Determination of Uranium Titration

1 Scope

This section GB/T 11848 specifies the measurement principle of uranium in uranium ore concentrate, the scope of the use of reagents and instruments, analysis step Sudden, analysis methods and calculation precision results. This section applies to uranium ore - Determination of uranium enrichment.

2 Normative references

The following documents contain provisions which, through reference GB/T 11848 in this section 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 10268 uranium ore concentrate

3 Method summary

3.1 Weigh the sample using the method of weight loss. Samples were dissolved in a mixed acid of sulfuric acid and nitric acid, and then weighed portion of the solution was analyzed. 3.2 in concentrated phosphoric acid solution containing amino acid, the ferrous sulfate solution with an excess of uranium (Ⅵ) reduction of uranium (Ⅳ), and molybdenum (Ⅵ) Under the presence of nitric acid with an excess of ferrous oxide, vanadium sulfuric acid diluted with water and added to an acid solution was titrated with standard potassium dichromate. 3.3 impurities within specification GB/T 10268 stipulated that interference is negligible.

4 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water. 4.1 hydrofluoric acid, (HF) = 30%. Nitric acid 4.2, ρ (HNO3) = 1.42g/mL. 4.3 perchloric acid, (HClO4) = 70%. 4.4 phosphoric acid, (H3PO4) = 85%. Sulfuric acid 4.5, ρ (H2SO4) = 1.84g/mL. 4.6 vanadium sulfuric acid (VOSO4 · 2H2O), should be used without vanadium (Ⅲ) and Vanadium (Ⅴ) of high-purity reagents. 4.7 sulphate solution, Ba (H2SO4) = 9mol/L. 500mL under constant stirring to sulfuric acid (4.5) was added to 500mL of water, cooled, and diluted with water to 1L. 4.8 ferrous sulfate solution, Ba (FeSO4) = 1.0mol/L. Sulfuric acid under stirring 100mL (4.5) was added to 750mL water, then add 278g of ferrous sulfate (FeSO4 · 7H2O), was dissolved Diluted to 1L, within two weeks effective solution. 4.9 oxidizing solution 4g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] was dissolved in 400mL of water, 500mL added nitric acid (4.2), and mix; plus Amino acid solution into the 100mL (4.10) and mix. 4.10 sulfamic acid solution, Ba (NH2SO3H) = 1.5mol/L. ......

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