INFICON HAPSITE ER Chemical Identification System User Manual
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HAPSITE ER Operating Manual
Library . . . . . . . . . . . . . . . . . . . . . . . A user compiled list of compounds, which
includes both analytes and internal
standards (if chosen). The Library keeps
information such as the name, target ion,
concentration, retention time, relative mass
intensities, and compound specific search
parameters (if selected).
LL. . . . . . . . . . . . . . . . . . . . . . . . . . . Left Limit.
LMB . . . . . . . . . . . . . . . . . . . . . . . . . Left Mouse Button.
Mass Calibration . . . . . . . . . . . . . . A function of the HAPSITE which uses
Internal Standard gas to check the alignment
of masses, and also to check the relative
intensities of the tune masses.
Mass Fragment. . . . . . . . . . . . . . . . A molecule (or ion) resulting from the
break-up of a parent molecule.
Mass Defect . . . . . . . . . . . . . . . . . . The effect on a mass spectrum of the
difference between the atomic weight of a
compound or fragment and a whole number.
Mass spectrum . . . . . . . . . . . . . . . . A display of the amount of each mass
fragment present at the specific time, plotted
as amplitude vs. molecular weight.
MDP . . . . . . . . . . . . . . . . . . . . . . . . . Molecular Dispersion Pump.
Membrane Isolation Valve . . . . . . . The valve which supports the Mass
Spectrometer’s inlet membrane and (when
closed) interrupts the flow of analyte from the
membrane into the Mass Spectrometer.
Method . . . . . . . . . . . . . . . . . . . . . . A set of instructions for a function of the
HAPSITE.
Molecular Weight . . . . . . . . . . . . . . The AMU representation of the total number
of protons and neutrons in a specified
molecule.
MS . . . . . . . . . . . . . . . . . . . . . . . . . . Mass Spectrometer
ms . . . . . . . . . . . . . . . . . . . . . . . . . . milliseconds
MSDS. . . . . . . . . . . . . . . . . . . . . . . . Material Safety Data Sheet
Multiplier Voltage . . . . . . . . . . . . . . The voltage applied to the multiplier in the
mass spectrometer, which directly effects the
amplitude of signal and background noise.
NEG . . . . . . . . . . . . . . . . . . . . . . . . . Non-evaporative getter as a vacuum source