INFICON HAPSITE Smart Plus Chemical Identification System User Manual

Page 554

17 - 6

N 07

HAPSITE Smart Plus 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