Ontology highlight
ABSTRACT:
SUBMITTER: Zavalin A
PROVIDER: S-EPMC3690593 | biostudies-literature | 2013 Jul
REPOSITORIES: biostudies-literature
Zavalin Andre A Yang Junhai J Caprioli Richard R
Journal of the American Society for Mass Spectrometry 20130510 7
We describe an easy and inexpensive way to provide a highly defined Gaussian shaped laser spot on target of 5 μm diameter for imaging mass spectrometry using a commercial MALDI TOF instrument that is designed to produce a 20 μm diameter laser beam on target at its lowest setting. A 25 μm pinhole filter on a swivel arm was installed in the laser beam optics outside the vacuum ion source chamber so it is easily flipped into or out of the beam as desired by the operator. The resulting ion images at ...[more]