YS/T 861.2-2013Methods for chemical analysis of niobium-titanium alloy. Part 2: Determination of oxygen and nitrogen content. Inert gas fusion infrared/thermal conductivity method (English PDF)

Foreword

YS/T 861 "niobium-titanium alloy chemical analysis method" is divided into five sections.

--- Part 1. aluminum, nickel, silicon, iron, chromium, copper, tantalum content - Inductively coupled plasma atomic emission spectrometry;

--- Part 2. oxygen, the determination of nitrogen inert gas fusion infrared absorption/thermal conductivity method;

--- Part 3. Determination of hydrogen content of inert gas fusion thermal conductivity method;

--- Part 4. Determination of carbon content in the high-frequency combustion infrared absorption method;

--- Part 5. Determination of the amount of titanium ammonium ferric sulfate titration.

This section YS/T 861 Part 2.

This section drafted in accordance with GB/T 1.1-2009 given rules.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This section is drafted. Western Metal Materials Co., Ltd., Guangzhou Nonferrous Metal Research Institute, Beijing Nonferrous Metal Research Institute.

Drafters of this section. red Yang Jun, a new layer of stone, Zhangjiang Feng, Wei Dong, high Xiao-li, Liu Jianbin, Zhuang Yichun, Xiao new, Redevex school, Mr Cho, Song Xiao force.

Niobium-titanium alloys Part 2. oxygen, nitrogen determination of Inert gas fusion infrared absorption/thermal conductivity method

1 Scope

This section YS/T 861 specifies the method for measuring the amount of oxygen and nitrogen in the niobium-titanium alloy.

This section applies to the determination of niobium-titanium alloy in the oxygen and nitrogen, and oxygen measurement range. 0.0010% - 0.25%, nitrogen measurement range.

0.0005% to 0.025%.

2 Method summary

Melting the sample, the sample in the form of CO oxygen precipitates in an inert atmosphere (helium), CO is oxidized to CO2, the CO2 infrared detection cell Detecting oxygen content; nitrogen in the sample precipitates in the form of N2, is detected by a thermal conductivity detector cell nitrogen content.

3 Reagents and materials

Unless otherwise indicated, this part of the reagents used were of analytical grade reagents.

3.1 ether.

3.2 graphite crucible. hot crucible or set of crucibles.

3.3 Nickel basket. wO<=0.0005%; wN<=0.00005%.

3.4 Helium. Volume fraction >=99.995%.

3.5 Standard sample. the sample selection and composition, oxygen and nitrogen content similar to standard samples or other applicable standard sample.

3.6 tweezers.

4 Instrument

Oxygen, nitrogen analyzer. Instrument sensitivity is not less than 0.00001%.

5 Sample

5.1 Samples cut from about 0.050g sample, washed with diethyl ether (3.1), allow to dry.

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

6 Step, Analysis