What is the difference between AP-SMALDI 5AF and conventional MALDI?

It enters the laser from the back of the sample and works under ambient pressure, improving ion yield and simplifying preparation, but still usually requires a matrix.

Do both AP-SMALDI 5AF and LDPI need a matrix?

AP-SMALDI usually still requires a matrix; LDPI uses laser/photoionization, matrix-free, with low background above m/z≥70.

Which to choose for small-molecule imaging?

For small-molecule low background, choose LDPI (matrix-free); if you accept a matrix and want MALDI-class soft ionization, AP-SMALDI is an option.

Can LDPI be compatible with my instrument?

LDPI is compatible model-by-model with mainstream mass spectrometers such as Agilent, SCIEX and Thermo; please refer to the official compatibility list for specifics.

Brand Compatibility · Neo-Source

AP-SMALDI 5AF ambient transmission MALDI imaging source

AP-SMALDI 5AF is an ambient transmission-mode matrix-assisted laser desorption ionization (AP-SMALDI) imaging source, where the laser enters from the back of the sample to perform MALDI desorption and ionization in an ambient environment, simplifying preparation and improving ion yield; it still belongs to the MALDI family and usually requires matrix spraying.

Table of Contents
1. Device principle 2. Differences from Neo-Source LDPI 3. Compatibility and selection 4. Procurement and validation suggestions

AP-SMALDI 5AF ambient transmission MALDI imaging source — schematic diagram

1. Device principle

AP-SMALDI enters the laser from the back of the sample, reducing surface charge accumulation and improving ion yield, and operates under ambient pressure (AP) to simplify sample transfer. It retains MALDI's high sensitivity to peptides, proteins and lipids, but sample preparation still requires matrix spraying and co-crystallization.

Ambient operation is its main convenience over vacuum MALDI: samples do not need to enter the vacuum chamber, making preparation and switching faster. But this path does not eliminate the matrix itself, and matrix peak interference in the low-mass region remains, which is the essential difference from matrix-free sources.

2. Differences from Neo-Source LDPI

Neo-Source LDPI also works under ambient pressure, but uses laser desorption plus photoionization, needs no organic matrix, has a low background above m/z≥70, and better suits small-molecule drug and metabolite imaging; its 2–3 μm resolution (among the best in the industry) reaches the single-cell/subcellular scale.

In short: AP-SMALDI 5AF is an ambient version of MALDI (still needs matrix), while LDPI is an ambient matrix-free source (no matrix background). If the focus is on small-molecule imaging with low background, LDPI fits better; if you prefer MALDI-class soft ionization and can accept a matrix, AP-SMALDI is an option.

3. Compatibility and selection

AP-SMALDI class sources require confirmation of specific instrument and analyzer support; Neo-Source LDPI adapts to Agilent, SCIEX and Thermo via external modular form, reusing the existing instrument.

Selection should return to molecule type: small molecules/drugs/metabolites requiring low background choose LDPI; proteins/peptides acceptable with matrix choose AP-SMALDI or another MALDI configuration. Specific manufacturer parameters are subject to the latest official release.

4. Procurement and validation suggestions

If considering an AP-SMALDI 5AF class source, you should request resolution, sampling speed, matrix compatibility and a compatible instrument list from the manufacturer, and verify with your own samples whether the low-mass background meets your small-molecule imaging needs.

If you prefer a matrix-free ambient route, you can concurrently evaluate the Neo-Source LDPI/DPI external solution, and decide after comparing sample-preparation burden, resolution and total cost of ownership.

Neo-Source x AP-SMALDI 5AF Compatibility Advantages

No host replacement:Modular external add-on reuses the existing AP-SMALDI 5AF mass spectrometer, lowering the cost of imaging upgrades

Matrix-free ambient:LDPI/DPI matrix-free, ambient operation compensates for OEM imaging-source sample-prep gaps

Single-cell resolution:LDPI 2–3 μm, among the best in the industry, extends single-cell/subcellular research capabilities

Get the AP-SMALDI 5AF host compatibility plan →

Frequently Asked Questions (FAQ)

What is the difference between AP-SMALDI 5AF and conventional MALDI?: It enters the laser from the back of the sample and works under ambient pressure, improving ion yield and simplifying preparation, but still usually requires a matrix.
Do both AP-SMALDI 5AF and LDPI need a matrix?: AP-SMALDI usually still requires a matrix; LDPI uses laser/photoionization, matrix-free, with low background above m/z≥70.
Which to choose for small-molecule imaging?: For small-molecule low background, choose LDPI (matrix-free); if you accept a matrix and want MALDI-class soft ionization, AP-SMALDI is an option.
Can LDPI be compatible with my instrument?: LDPI is compatible model-by-model with mainstream mass spectrometers such as Agilent, SCIEX and Thermo; please refer to the official compatibility list for specifics.

Get Specifications & Quotation

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).

AP-MALDI (Ambient MALDI)MALDI Neo-Source MSI LDPI Laser Desorption Photoionization imaging ion source Matrix-Free MSI Ion Source Ambient MSI Ion Source

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