Mass spectrometry imaging in food analysis Mass Spectrometry Imaging in Food Analysis a volume in the Food Analysis and Properties Series explains how the novel use of matrix assisted laser desorption ionization mass spectrometry imaging (MALDI MSI) will be an ideal complementary approach. MALDI MSI is a two dimensional MALDI MS technology that can detect compounds in a tissue section without extraction purification separation or labeling. It can be used to visualize the spatial distribution of biomolecules in foods