O, N determination in titanium samples
时间：2015-05-15 阅读：5692
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n ON 900
n ONH 2000
Used accessories
n Inner graphite crucibles (90180)
n Outer graphite crucibles (90185)
n Nickel basket (90250) or AR 2344
n Suitable calibration material (NIST or other)
Settings
n Comparator level: 20 mV
n Minimum time: 15 sec
n Maximum time: 3:00 min
n Post waiting: 30 sec
n Base line deviation: 200 mV;
Step: 16 mV; Time: 10 sec
n Mode: continuous
n Outgas
Time: 45 sec
Power: 6 kW
n Time
Purge: 20 sec
Stability: 45 sec
n Integration delay
IR cell: 2 sec
TC cell: 10 sec
n 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.
Procedure
n Prepare ELTRA analyzer (exchange anhydrone,
sodium hydroxide, copper oxide when necessary),
clean furnace, sample drop mechanism, electrode tip
n Run three blanks with empty crucibles
n Calibrate the analyzer with suitable calibration
material (NIST or other)
(1) Fill one empty inner crucible (90180) in one outer
crucible (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
approximay 10 times.
Repeat steps (1) – (3) at least three times;
Mark the results and use the calibration function in the
software.