Orbitrap delivers high resolution and high mass accuracy, suitable for precise identification of metabolites or lipids in complex mixtures; Q-TOF (quadrupole time-of-flight) balances high resolution with relatively fast scanning and is a common MSI platform; TOF scans fast and suits large-area imaging; triple quadrupole excels at targeted quantification; FT-ICR offers the highest mass accuracy but at high cost.
For external modular sources such as Neo-Source LDPI/DPI, the design is oriented toward mainstream LC-MS/MS or Orbitrap/TOF host instruments from Agilent, SCIEX, Thermo and others, allowing teams to reuse existing instruments for imaging.
Imaging requires the mass spectrometer to operate under fast, stable per-pixel conditions: a full scan per pixel must be fast enough, otherwise the whole image takes too long; at the same time, the mass axis must stay stable over time to avoid drift between pixels.
Therefore MSI often prefers analyzers with fast scan speeds (TOF/Q-TOF), or optimizes the transient time of Orbitrap to balance accuracy and speed. The interface (ion transfer tube, differential vacuum) must efficiently introduce ions generated at ambient pressure or by desorption.
Traditional MALDI/SIMS are mostly dedicated full systems; external sources such as DESI/LDPI/DPI interface with existing host instruments as adaptation kits, which is a low-cost path to repurpose old instruments for new use.
When selecting, one must confirm whether the source-host interface (voltage, vacuum, software trigger, scan synchronization) is supported by the manufacturer. Neo-Source models such as DPI-25A/25S/25T are designed to mainstream host interfaces, lowering the adaptation threshold.
For precise identification and unknown discovery, choose Orbitrap/Q-TOF; for large-scale fast imaging, choose TOF; for targeted quantification, choose triple quadrupole; for ultimate mass accuracy, choose FT-ICR.
For most teams, starting with an existing Q-TOF/Orbitrap host instrument plus an external modular source (LDPI/DPI) is the most economical entry point; then upgrade the analyzer or add a dedicated MALDI/SIMS full system as data needs grow.
To obtain detailed specifications, compatible models, or a quotation for the MSI LDPI / DPI full series imaging ion sources, visit the Neo-Source official website, or contact the official team for compatibility advice tailored to your mass spectrometer (Agilent / SCIEX / Thermo and other mainstream MS).