IR-MALDESI Mass Spectrometry Imaging at 50 Micron Spatial Resolution
- North Carolina State University, W.M. Keck FTMS Laboratory for Human Health Research, Department of Chemistry (United States)
- JGM Associates Inc. (United States)
High spatial resolution in mass spectrometry imaging (MSI) is crucial to understanding the biology dictated by molecular distributions in complex tissue systems. Here, we present MSI using infrared matrix-assisted laser desorption electrospray ionization (IR-MALDESI) at 50 μm resolution. An adjustable iris, beam expander, and an aspherical focusing lens were used to reduce tissue ablation diameters for MSI at high resolution. The laser beam caustic was modeled using laser ablation paper to calculate relevant laser beam characteristics. The minimum laser spot diameter on the tissue was determined using tissue staining and microscopy. Finally, the newly constructed optical system was used to image hen ovarian tissue with and without oversampling, detailing tissue features at 50 μm resolution. .
- OSTI ID:
- 22776864
- Journal Information:
- Journal of the American Society for Mass Spectrometry, Journal Name: Journal of the American Society for Mass Spectrometry Journal Issue: 10 Vol. 28; ISSN 1044-0305; ISSN JAMSEF
- Country of Publication:
- United States
- Language:
- English
Similar Records
Five Micron High Resolution MALDI Mass Spectrometry Imaging with Simple, Interchangeable, Multi-Resolution Optical System
A Simple Method for Improving the Spatial Resolution in Infrared Laser Ablation Mass Spectrometry Imaging