INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 549)

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HAPSITE Smart Plus Operating Manual
Chapter 17
Glossary
17.1 Glossary
Air peak . . . . . . . . . . . . . . . . . . . . . . A response by the mass spectrometer to
components of air. The compounds in this
peak are un-retained, or uninhibited by the
standard 30 meter 1.0
 m film thickness
boiling point column. This set of compounds
typically elutes 1 to 1.5 minutes from the start
of analysis.
Alignment . . . . . . . . . . . . . . . . . . . . A part of the tuning process which assures
that the mass peaks fall at their calibrated
position on the mass scale.
AM . . . . . . . . . . . . . . . . . . . . . . . . . . Analytical Module, also called the HAPSITE
and HAPSITE Smart Plus.
AMDIS . . . . . . . . . . . . . . . . . . . . . . . Automated Mass Spectral Deconvolution
and Identification System Software
AMU . . . . . . . . . . . . . . . . . . . . . . . . . (Atomic Mass Unit) The dimension in which a
number of protons and neutrons are stated.
Analyte . . . . . . . . . . . . . . . . . . . . . . That portion of a sample which comprises
compounds to be analyzed; that is,
separated, identified and measured.
Atomic Weight . . . . . . . . . . . . . . . . The AMU representation of the number of
protons and neutrons in a specified atom.
AutoTune . . . . . . . . . . . . . . . . . . . . . A process that occurs when the instrument is
initially started up; it automatically performs
mass alignment, resolution adjustment and
adjustment of relative intensity of the peaks.
AutoTune will take place once the heated
zones have reached the proper temperature.
Baseline. . . . . . . . . . . . . . . . . . . . . . A measure of the intensity of the background
noise of the mass spectrometer. This is
determined using the Noise Check feature in
the Tune program.
Calibration Curve . . . . . . . . . . . . . . The mean value of the measured noise level.