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HAPSITE ER Operating Manual
Figure 8-76 File Menu
8.7.1 Background Subtract
Background Subtract will remove masses in the spectrum that are caused by
background interference. Using Background Subtract will increase the SI number
of the identification when the low SI number is a result of high background. Follow
the instructions below to perform a Background Subtract.
1 Perform a NIST Library Search by checking the Search NIST/User box in the
Control Panel.
2 If the SI number is low and the background is high, select the blue
Background Subtract triangle from the lower left side of the chromatogram.
(See Figure 8-77.)
Figure 8-77 Background Subtract Triangle
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