Skip to main content
University of Wisconsin–Madison

Mass Spectrometry / Proteomics Facility


We are open for business! We are happy to be back. During Phase 1, we will be operating at reduced capacity. We will make every effort to keep turnaround times short as we understand there are many projects that have been waiting. We appreciate your patience and business. The UW Biotechnology Center is following University guidelines regarding COVID-19.

MALDI spectrum acquisition of analytes from ~700 Da up to >300,000 Da. High resolution available for analytes < 4000 m/z in reflector mode. Low resolution on all analytes >4000 m/z.

MALDI Imaging picture

Matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) allows label-free spatial analysis of biological tissue samples.  Profiling of biomolecules such as small molecules, drugs, peptides and proteins is possible directly from tissue samples with a resolution of around 100 micrometers. 

Matrix coated sections of tissue are introduced into the 4800 MALDI TOF/TOF and a laser is rastered over the sample while acquiring mass spectra at every image point.  BioMap biomedical image analysis software is used to process and display the data. 

Matrix applicator device was designed in BME 201