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Utility of Desorption Electrospray Ionization (DESI) for Mass Spectrometry Imaging

Waters
20 Mar 2015

DESI imaging uses a charged jet of solvent to deposit micro-droplets onto a surface where analytes are extracted and desorbed into the gas phase at ambient pressure and temperature. This application note describes the DESI imaging technique as applied to mass spectrometry imaging using time-of-flight (TOF) mass spectrometers, such as the SYNAPT® G2-Si or the Xevo® G2-XS.

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SYNAPT G2-Si MS

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Xevo G2-XS ToF

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Mass SpectrometryMass spectrometry (MS) is a powerful analytical technique used to identify and quantify molecules based on the mass-to-charge ratio of gas-phase ions. It provides detailed information about the structure, composition, and properties of compounds and is widely used across fields such as environmental monitoring, materials science, drug discovery and development, food and beverage testing, and wider chemical research. Key MS techniques include tandem mass spectrometry (MS/MS), liquid chromatography–mass spectrometry (LS-MS) and inductively coupled plasma (ICP-MS). Choosing from these wide range of techniques and technologies can be a daunting task, so keep up to date with scientific applications, performance expectations, and customer reviews here all in one place. Visit our product directory to receive quotes direct from the manufacturer. ProteomicsProteomics is the systemic bioinformatics study of proteins and amino acids, including their structure, size, function and identification. Tools used in proteomics include chromatography, blotting and gels, protein arrays, mass spectrometry and ELISA and associated analysis software. Analyzers and proteomic systems should be sensitive, high resolution, fast and may be automated for high-throughput.BiomarkersBiomarkers are biological markers which can be measured and evaluated to indicate a biological state. The use of biomarkers in research and diagnosis can indicate a normal or disease state or drug response of cells / tissues. Biomarkers include genetic markers, cell surface markers such as antigens, antibodies or receptors and secreted molecules such as cytokines. An assay system is required for identification of biomarkers. :Drug DeliveryDrug Delivery refers to dosage form, route of administration, formulations, technologies, and systems for transporting a pharmaceutical compound in the body as needed to safely achieve its desired therapeutic effect. Drug delivery is often approached via the biopharmaceutical or small molecule drug's formulation, but it may also involve medical devices or drug-device combination products. Considerations include instrumentation, software and services. Imaging Mass SpectrometryImagingImaging techniques are essential for obtaining visual representations of samples to understand structures, processes, and function in biological, chemical, and physical research. These tools range from traditional light microscopy to advanced imaging modalities like MRI and electron microscopy, providing researchers with valuable data for diagnostics, drug discovery, and material analysis. Explore imaging solutions in our peer-reviewed product directory to compare products, check reviews, and get pricing directly from manufacturers.

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