LTQ Orbitrap XL Hardware Manual

type and selected ion monitoring (SIM) scan
type.
MSDS Material Safety Data Sheet
MS/MS Mass spectrometry/mass spectrometry, or
tandem mass spectrometry is an analytical
technique that involves two stages of mass
analysis. In the first stage, ions formed in the ion
source are analyzed by an initial analyzer. In the
second stage, the mass-selected ions are
fragmented and the resultant ionic fragments are
mass analyzed.
MSn scan mode The scan power equal to 1 to 10,
where the scan power is the power n in the
expression MSn. MSn is the most general
expression for the scan mode, which can include
the following:
• The scan mode corresponding to the one stage
of mass analysis in a single-stage full-scan
experiment or a selected ion monitoring (SIM)
experiment
• The scan mode corresponding to the two stages
of mass analysis in a two-stage full-scan
experiment or a selected reaction monitoring
(SRM) experiment
• The scan mode corresponding to the three to
ten stages of mass analysis (n = 3 to n = 10) in a
multi-stage full-scan experiment or a
consecutive reaction monitoring (CRM)
experiment.
See also MS scan modes and MS/MS.
multipole A symmetrical, parallel array of
(usually) four, six, or eight cylindrical rods that
acts as an ion transmission device. An RF voltage
and dc offset voltage are applied to the rods to
create an electrostatic field that efficiently
transmits ions along the axis of the multipole
rods.
m/z Mass-to-charge ratio. An abbreviation used to
denote the quantity formed by dividing the mass
of an ion (in u) by the number of charges carried
Glossary: MSDS
by the ion.
For example, for the ion C 7 H 7 2+ , m/z = 45.5.
n nano (10 -9 )
nanospray ionization (NSI) A type of
electrospray ionization (ESI) that accommodates
very low flow rates of sample and solvent on the
order of 1 to 20 nL/min (for static nanospray) or
100 to 1000 nL/min (for dynamic nanospray).
NCBI National Center for Biotechnology
Information (USA)
NIST National Institute of Standards and
Technology (USA)
NMR Normal Mass Range
NSI See nanospray ionization (NSI).
octapole An octagonal array of cylindrical rods
that acts as an ion transmission device. An RF
voltage and dc offset voltage applied to the rods
create an electrostatic field that transmits the ions
along the axis of the octapole rods.
OD outside diameter
OT Orbitrap
Ω ohm
p pico (10 -12 )
Pa pascal
PCB printed circuit board
PDA detector Photodiode Array detector is a
linear array of discrete photodiodes on an
integrated circuit chip. It is placed at the image
plane of a spectrometer to allow a range of
wavelengths to be detected simultaneously.
PE protective earth
PID proportional / integral / differential
Thermo Fisher Scientific LTQ Orbitrap XL Hardware Manual G-5