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GB/T 4325.25-2013Methods for chemical analysis of molybdenum - Part 25: Determination of hydrogen content - Intert gas fusion infrared absorption method/thermal conductivity method (English PDF)

钼化学分析方法第25部分：氢量的测定惰气熔融红外吸收法/热导法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 9, 2013

Implementation date

February 1, 2014

Scope

GB/T 4325.25-2013 is the English-translated version of 钼化学分析方法第25部分：氢量的测定惰气熔融红外吸收法/热导法.

GB/T 4325.25-2013 is the Chinese standard "Methods for chemical analysis of molybdenum - Part 25: Determination of hydrogen content - Intert gas fusion infrared absorption method/thermal conductivity method".

Its scope clause reads: GB/T 4325 provisions of this part of the determination of molybdenum in the amount of hydrogen. This section applies to powder, molybdenum, molybdenum determination of the amount of hydrogen molybdenum products.

Measurement range. 0.0010% to 0.0250%. Its clauses include method summary; reagents and materials; instrument; sample.

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Document preview — GB/T 4325.25-2013

National Standard of the People's Republic of China

ICS: 77.120.99
Classification: H 63

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Method summary
3 Reagents and materials
4 Instrument
5 Sample

1 Scope

GB/T 4325 provisions of this part of the determination of molybdenum in the amount of hydrogen.

This section applies to powder, molybdenum, molybdenum determination of the amount of hydrogen molybdenum products. Measurement range. 0.0010% to 0.0250%.

2 Method summary

A sample with a co-solvent is added to a graphite crucible in an inert gas (helium) under the protection of the melt, in a sample of hydrogen to form hydrogen precipitation, hydrogen

Is oxidized to water by infrared detection cell or TCD hydrogen content, hydrogen content calculated computing system based on the quality of the sample, the percentage of results

FIG.

3 Reagents and materials

3.1

acetone, AR.

3.2

graphite crucible.

3.3

Nickel capsule (wH<=0.00005%).

Helium 3.4, the volume fraction of not less than 99.995%.

3.5 Standard substance/Standard sample

the hydrogen content of the material to be tested with similar congeners.

4 Instrument

4.1

Inert gas fusion - thermal conductivity/infrared detector hydrogen analyzer.

4.2

Analytical balance, dividing the value of 0.1mg.

5 Sample

5.1

specimens should be sealed.

5.2

powdery direct sampling, mass of about 0.5g.

5.3

molybdenum products such as molybdenum products, core samples from the sampling unit, (3.1) and washed with acetone, dried, mass of about 0.5g.

5.4

sample can not be contaminated during operation, with special forceps.

Step 6 Analysis

6.1 Warm up

To fully preheated before instrumental analysis, so that the indicators of the instrument reaches the set value.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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