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Finnigan GasBench
Measurement Procedures for Real Samples
II ________________________________________________ Water Equilibration (H/D)
5.7
Water Equilibration (H/D)
H/D Equilibration in Brief
Figure 5-29.
Sample Preparation for H/D Equilibration
In case of any hydrogen equilibration perform the following steps keeping the
tray at room temperature (see Sample Tray Temperature Control on
page 5-31):
•
Insert the sample into the vials and insert the catalytic platinum sticks.
•
Flush all samples with 2 % H2 in He. Run a flushing sequence. See
Creating a New Sequence on page 3-34. The equilibration is
finished within 40 min. It is not necessary to wait additional time.
•
Exchange the rinsing needle with the sampling needle.
There are various needle sets using the same needle type: one set of
needles exists for flushing (that is rinsing needle) and another one for
measuring (that is sampling needle). The rinsing needle is used to
rinse the vials: the recurrent capillary must be broken off at 20 cm to
let the rinsing agent pass into ambient air. In case of the sampling
needle, the recurrent capillary leads into GasBench II.
•
Run a mesurement sequence. See Creating a New Sequence on
page 3-34.
Thermo ____________________ Finnigan GasBench II Operating Manual __________________ 5-33
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