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Sample target for a MALDI mass spectrometer. The type of a mass spectrometer most widely used with MALDI is the time-of-flight mass spectrometer (TOF), mainly due to its large mass range. The TOF measurement procedure is also ideally suited to the MALDI ionization process since the pulsed laser takes individual 'shots' rather than working in ...
MALDI mass spectrometry imaging (MALDI-MSI) is the use of matrix-assisted laser desorption ionization as a mass spectrometry imaging [2] technique in which the sample, often a thin tissue section, is moved in two dimensions while the mass spectrum is recorded. [3]
MS/MS – Mass spectrometry/mass spectrometry, i.e. tandem mass spectrometry MALDESI – Matrix-assisted laser desorption electrospray ionization MALDI – Matrix-assisted laser desorption/ionization
[5] [6] This is because they first reported in 1985 a method, with higher sensitivity using a small organic compound as a matrix, that they named matrix-assisted laser desorption/ionization (MALDI). [7] Also Tanaka's SLD is not used currently for biomolecules analysis, meanwhile MALDI is widely used in mass spectrometry research laboratories.
The ions are subsequently introduced into a mass spectrometer. [2] The ESI-like ionization mechanism has been experimentally demonstrated and studied in depth, [ 8 ] [ 9 ] [ 10 ] showing equivalent softness as ESI and enabling the detection of intact protein complexes.
Laser ionization time-of-flight mass spectrometer where ions are accelerated and separated by mass in a field-free drift region before detection Bendix MA-2 Time-of-Flight Mass Spectrometer, 1960s. Time-of-flight mass spectrometry (TOFMS) is a method of mass spectrometry in which an ion's mass-to-charge ratio is determined by a time of flight ...
A typical workflow of a peptide mass fingerprinting experiment. Peptide mass fingerprinting (PMF), also known as protein fingerprinting, is an analytical technique for protein identification in which the unknown protein of interest is first cleaved into smaller peptides, whose absolute masses can be accurately measured with a mass spectrometer such as MALDI-TOF or ESI-TOF. [1]
In SEAC, the sample surface is modified to bind the analyte of interest for analysis with laser desorption/ionization mass spectrometry (LDI-MS). [ 1 ] [ 4 ] [ 6 ] SEPAR is a combination of SEND and SEAC; the modified sample surface also acts as an energy absorbing matrix for ionization.
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