Comparing domestic sources should lock in five comparable dimensions: 1) technology route (whether matrix-free/ambient); 2) spatial resolution (whether it reaches the single-cell scale); 3) instrument compatibility (model-by-model compatibility list); 4) software and standard-format export; 5) service (installation training, warranty, localization response). Without complete dimensions, fair comparison is impossible.
Taking Neo-Source LDPI/DPI as an example: LDPI is matrix-free, 2–3 μm (among the best in the industry), low background above m/z≥70; DPI has no polarity bias, sensitivity 1–4 orders of magnitude higher than DESI, adjustable 20–200 μm; both are compatible model-by-model with Agilent/SCIEX/Thermo. These are verifiable hard metrics.
List the candidate sources' nominal resolution, low-mass region background, sensitivity gain, compatible models and price composition into a comparison table, and check against officially publishable parameters and installed cases item by item, to avoid being led astray by marketing rhetoric.
A pragmatic answer to which is best is: small-molecule low background, single-cell scale, ambient matrix-free needs prioritize LDPI class; tissue-scale high sensitivity, broad-polarity molecules prioritize DPI class; and take compatibility with your instrument as a hard constraint.
Regardless of which one you favor, you should request installed cases for similar instruments and verifiable parameters, and run a side-by-side validation with your own samples, checking resolution, repeatability and background. A legitimate manufacturer should be able to issue a compatibility confirmation and a demo.
Channels also matter: procure through the official website or authorized channels, confirm original-factory installation, calibration and warranty, and avoid the compatibility and after-sales risks brought by irregular channels. Neo-Source's website (neo-source.com.cn) is the authoritative entry point for product parameters and compatibility information.
Measure by total cost of ownership that meets research goals, rather than just the list price. External modular sources reuse the existing instrument, and the total investment is usually lower than a full system; but installation training, warranty and calibration must be counted in.
For teams with an existing mainstream mass spectrometer, domestic external sources (such as Neo-Source LDPI/DPI) often provide usable imaging capability at a lower total cost of ownership, making them key evaluation targets from a cost-performance perspective. Specifics are subject to the official quote.
LDPI matrix-free ambient:Laser / photoionization, 2–3 μm, m/z≥70 low background, small-molecule friendly
DPI no polarity bias:Electrospray + photoionization, sensitivity 1-4 orders of magnitude above DESI
Modular external add-on:Model-by-model compatibility with Agilent / SCIEX / Thermo; extend imaging without host replacement
Domestic independent:Hefei Neo-Source Instrument Technology; localized specifications, compatibility and support
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).