INFICON Explorer Portable Gas Chromatograph - Manual (Page 180)

Method Development
178
Minimum Height
The Minimum Height is required for comparison in the basic peak recognition
sequence. Although single Up/Down Slope and Minimum Height values are
displayed the integrator will operate on the same data with four different filters
simultaneously since it does not know critical information such as peak widths. It
then selects the best result based on identifying the maximum number of significant
peaks.
Set the minimum height based on the detector response to the smallest peak. Peaks
that do not meet the minimum height will not be integrated and thus will not be
included in the peak report.
Minimum Area
Set the minimum area based on the detector response to the smallest peak. Peaks
that do not meet the minimum area will not be included in the peak report. These
two options are used to eliminate baseline disruptions that have been mistakenly
identified as compound peaks.
Integration Delay
Use the integration delay option to delay the start of the integration timer. This
can be useful if your analysis contains more than 25 peaks. SiteChart and
Explorer can identify 25 compounds at a time. If you are interested in the first 25
peaks set the delay time to 0. If you are interested in peaks that elute later in the
analysis, set the delay to 60 seconds, or an appropriate delay for your analysis
time, so that the first peaks are ignored and the 25 peaks eluting after 60 seconds
will be identified and displayed.
If you need to identify all the peaks in the run, then set the delay to 0 and print an
analysis report. Then set the delay to 60, or an appropriate delay for your analysis
time and re-integrate the run. Then, print another analysis report.
If you are using a PID with nitrogen carrier gas, you will see a negative peak due to
oxygen in your sample. Set the integration delay so that the timer begins after this
negative peak. If you are using the ECD this oxygen peak will be positive.