Oxygen and Nitrogen Determination in Titanium Samples

Oxygen and Nitrogen Determination in Titanium Samples

 

Suitable analyzers

  • ON 900
  • ONH 2000

Used accessories

  • Inner graphite crucibles (90180)
  • Outer graphite crucibles (90185)
  • Nickel basket (90250) or AR 2344
  • Suitable calibration material (NIST or other)

Settings

  • Comparator level: 20 mV
  • Minimum time: 15 sec
  • Maximum time: 3:00 min
  • Post waiting: 30 sec
  • Base line deviation: 200 mV;
  • Step: 16 mV; Time: 10 sec
  • Mode: continuous
  • Outgas
    • Time: 45 sec
    • Power: 6 kW
  • Time
    • Purge: 20 sec
    • Stability: 45 sec
  • Integration delay
    • IR cell: 2 sec
    • TC cell: 10 sec
  • Analyse (1)
    • Time: 75 sec
    • Power (1): 6 kW
    • Power (2): 6 kW

 

Sample preparation

Make sure that the surface of the titanium is free from contaminations; otherwise clean the sample with acetone p.a. and let dry at atmosphere.

ProcedureTypical Results Oxygen and Nitrogen in Titanium Samples with Eltra Analyzer

  • Prepare ELTRA analyzer (exchange anhydrone, sodium hydroxide, copper oxide when necessary), clean furnace, sample drop mechanism, electrode tip
  • Run three blanks with empty crucibles
  • Calibrate the analyzer with suitable calibration material (NIST or other)
    • (1) Fill one empty inner crucible (90180) in one outercrucible (90185) and place them on the electrode tip, close furnace (F2 Button)
    • (2) Weigh calibration material and give it into a nickel basket (90250 or AR2344)
    • (3) Place nickel basket with calibration material or sample in the sample drop mechanism and start analysis (F5 Button)

After analysis give the inner crucible into waste and fill in a new one. The outer crucibles can be used approximately 10 times.
Repeat steps (1) – (3) at least three times; Mark the results and use the calibration function in the software.
-> Now start with the actual analysis.