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YS/T 501-2013 English PDF

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YS/T 501-2013: Determination of thorium dioxide content in thorium-tungsten alloys. Gravimetric method
Status: Valid

YS/T 501: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
YS/T 501-2013English159 Add to Cart 3 days [Need to translate] Determination of thorium dioxide content in thorium-tungsten alloys. Gravimetric method Valid YS/T 501-2013
YS/T 501-2006English199 Add to Cart 2 days [Need to translate] The tungsten thorium alloys thorium dioxide Gravimetric method Obsolete YS/T 501-2006

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Basic data

Standard ID YS/T 501-2013 (YS/T501-2013)
Description (Translated English) Determination of thorium dioxide content in thorium-tungsten alloys. Gravimetric method
Sector / Industry Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard H63
Classification of International Standard 77.120.99
Word Count Estimation 6,678
Older Standard (superseded by this standard) YS/T 501-2006
Regulation (derived from) Ministry of Industry and Information Technology Bulletin No. 52, 2013; industry standard for filing Notice No. 1 of 2014 (No. 169 overall)
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This standard specifies the method for the determination of tungsten alloys thorium thorium dioxide content. This standard applies to the determination of the amount of thorium dioxide, thorium tungsten alloys. Measurement range: 0. 5% ~ 5. 0% o

YS/T 501-2013: Determination of thorium dioxide content in thorium-tungsten alloys. Gravimetric method


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Determination of thorium dioxide content in thorium-tungsten alloys. Gravimetric method ICS 77.120.99 H63 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 501-2006 Determination of tungsten thorium alloy amount of thorium dioxide Gravimetric method Issued on. 2013-10-17 2014-03-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. Instead of the standard YS/T 501-2006 "thorium-tungsten alloys thorium dioxide Gravimetric method." This standard YS/T 501-2006 Compared to the main technical changes are as follows. --- Modify the sample specifications and increased pole material detection; --- Modify the content of the detection range; --- Modify the sample weight, depending on the content of the sample amount weighed different; --- Increasing the sample processing reagent; --- Specifies the number of measurements; --- Change the representation of the solution concentration. This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized. This standard was drafted. Beijing General Research Institute of Mining and Metallurgy, the North Mine New Material Technology Co., Ltd., China Nonferrous Metals Industry Quality Standards and Metrology Institute The study. The main drafters of this standard. Li Ping Shan, Peng Ying, Wang Lu Yan, Liu Qin, Luxiu Chen, Zhou Heng. This standard replaces the standards previously issued as follows. --- YS/T 501-2006. Determination of tungsten thorium alloy amount of thorium dioxide Gravimetric method Warning --- Because radioactive thorium dioxide, please make the appropriate protection at work according to the standard operation.

1 Scope

This standard specifies the method for the determination of tungsten thorium alloy thorium dioxide content. This standard applies to the determination of the amount of thorium dioxide thorium tungsten alloy. Measuring range. 0.5% to 5.0%.

2 Method summary

Sample with a mixed acid of hydrofluoric acid and nitric acid decomposition of tungsten with fluorine complex into solution. Thorium dioxide precipitation, filtration, burning, Constant weight.

3 Reagents

This standard reagents were analytical reagent grade, which is distilled water or equivalent purity water. 3.1 Hydrofluoric acid (23). 3.2 nitric acid (ρ = 1.42g/mL). 3.3 ammonia (119). 3.4 Ethanol (191). 3.5 sodium carbonate solution (300g/L). 3.6 Sodium hydroxide solution (20g/L). 3.7 hydrochloride (11).

4 Sample

4.1 tungsten thorium billets, rods sample material was removed by boiling with sodium carbonate solution (3.5) graphite surface, the surface gloss, washed clean and then at 105 ℃ drying, place it on a clean carbide mortar crack small study, over 150μm or 180μm sieve. 4.2 silk material samples (3.6) boiled with sodium hydroxide solution to the surface of the wire divisible graphite layer was washed with water and wipe with a clean filter paper, then cut Subparagraph (length is generally not more than 2mm) in hydrochloric acid (3.7) soaked with ethanol (3.4) and wash clean and dry. Step 5 Analysis 5.1 Sample Table 1 sample was weighed, accurate to 0.0001g.

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