5.1 Trouble shooting
116
No peak or extremely
small peaks
(In this case, peaks
may not be able to be
detected because of
too high noise.
Refer to "A lot of noise
or noise level is high".)
[In case the detector is TCD]
Range is not "1". Set the range to "1".
Current value is set too low. Increase the current.
(Decrease TCD thermostatic
oven temperature, and increase
maximum working current.)
Makeup gas flow rate is too
high.
Modify it to the proper value.
Split ratio is too high. Decrease the split ratio
(in case of split analysis).
Carrier gas is leaking. Check for leaks in injection port
and column connection area.
The installing position of
capillary column is
inappropriate.
Install column properly.
Columns are contaminated. Condition columns.
Carrier gas or makeup gas is
contaminated.
Purge the air inside of flow line
sufficiently.
Replace tubing parts.
Use a purer gas.
Sample concentration is low, or
the injection volume is too low.
Increase the sample
concentration or the injection
volume.
An inappropriate column is
used.
Replace the column with the
appropriate one, considering
polarity, etc.
Other analytical conditions,
such as temperature or column
flow rate is inappropriate.
Change the analytical
conditions.
Problem Possible cause Solution Reference
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