VARIABLE
SAMPLE SIZE
Hydrocarbon
Contaminates
Variable sample size can cause a
nonrepeatibility of peak concentrations
if the peak area is varying
.
Defective Flow
Controller
Varying Oven
Temperature
Varying Carrier
Flow Rate
VARIABLE
RETENTION TIMES
Contaminated Carrier
or Makeup Gas
Leak in Column
Train
Sample Valve
Malfunction
Variable retention times can
result in nonrepeatibility
.
INDIVIDUAL PEAK
MISSING ON
REPORT
Gating in the method needs
to be modified to ensure
gating of the missing peak
in the report
Modify the gate ON
/OFF
time in the method table
Chromatogram indicates all peaks are
present,
but the data report shows the
peak to be nonexistent or unknown
.
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