Inficon Micro GC Fusion 2-Module User Manual

INFICON Troubleshooting | 11
074-594-P1H Micro GC Fusion Operating Manual 295 / 319
• The run time is not adequate for all the sample compounds to elute. Compounds
carry over and appear as traveling broad peaks during subsequent runs. This can
be eliminated by increasing
Column Temperature
or increasing the sample
Hold
Time
. If applicable, adjust the
Backflush Time
until all sample components appear
during a run
11.2.1.3.4 Deformed Peaks
The ideal chromatography peak is a pure Gaussian shape, although some asymmetry
is always present, particularly near the baseline. Some common types of deformed
peaks are described below.
11.2.1.3.4.1 Peak Fronting
The peak rises normally, then drops sharply to the baseline.
Fronting is usually caused by column overload. Reduce the sample
Inject (ms)
time. If
using a variable volume or fixed volume injector, do not reduce the
Inject (ms)
time to
less than 15 ms to avoid repeatability issues.
Fronting could also result from two (or more) closely unresolved peaks. Decrease the
column temperature by 30°C and repeat the analysis. If peaks separate at the lower
temperature, the fronting was caused by unresolved peaks.

Inficon Micro GC Fusion 2-Module Specifications

General

Brand	Inficon
Model	Micro GC Fusion 2-Module
Category	Measuring Instruments
Language	English