6
Using EA IsoLink IRMS System for CNSOH
Creating an EA Method for H+O Measurement
Thermo Scientific
EA IsoLink IRMS System for CNSOH Operating Manual
103
Figure 116.
NC EA Method: Instrument Flow-Timing
For single mode N analyses, a second trap can be installed filled with
Carbosorb®
or
Ascarite®
to
remove
CO
2
. The analysis time has to be reduced even further. In this case the entry Switch Gas
CO
2
can be deleted in the
Time Event List
of the
Isodat Method
.
Note
Sampling delay and oxygen injection end vary depending on the sample nature. O
2
injection
can be crucial in a single reactor if it exceeds the required amount.
The reference flow is used for the autosampler purge. This flow can be set to values between
20 mL/min
and
70 mL/min
(150 - 200 mL/min in total when using He
M
)
, with the goal to
minimize or eliminate the blank contribution of the autosampler.
