Real time monitoring of molecular interactions after injection of the sample solution.


Surface Plasmon Resonance imaging (SPRi)

The Label-Free Molecular Interaction Platform

HORIBA Scientific provides a powerful label-free platform for molecular interaction studies enabling real-time kinetic monitoring. Hundreds of spots can be immobilized on the Biochip and their corresponding sensorgrams analyzed in parallel, generating access to multiplex information, thanks to Surface Plasmon Resonance imaging.

A vast library of samples can be analyzed including proteins, antibodies, nucleic acids, engineered molecules (aptamers, affimers, DARPins), small molecules and cells.

The flexible OpenPlex and the fully automated XelPleX systems cover a wide range of life sciences applications, from protein screening to crude sample analysis including cell investigation.


Our trainers are experts in Surface Plasmon Resonance imaging. Their expertise will provide you with procedures, advice and guidance to ensure you are trained to get the most out of your HORIBA Scientific instrument.
You will gain confidence and experience in the analysis of your samples.

Technology & FAQ

Surface Plasmon Resonance imaging (SPRi) is a label-free optical detection technique used to monitor and analyze biomolecular interactions in real time. Learn more about this technique in the Technology pages.



Production of a single domain antibody Q17c directed against recombinant HER2 protein and its binding study by Surface Plasmon Resonance imaging technology

Production of a single domain antibody Q17c directed against recombinant HER2 protein and its binding study by Surface Plasmon Resonance imaging technology

This application note shows how binding kinetics of single-domain antibodies can be studied with SPRi technology. QVQ produces single-domain antibodies from camelids (sdAbs or VHH). Like conventional Abs, sdAbs are able to bind specific epitopes with high binding affinity. The small size of sdAbs allows for enhanced tumor penetration and fast blood clearance, features that are favorable for in vivo imaging applications. Here, the binding of the anti-HER2 sdAb Q17c to recombinant HER2 protein was assessed using Surface Plasmon Resonance imaging (SPRi). An optimization of immobilization conditions was performed for Q17c and its specific antigen HER2 using a single SPRi-Biochip.

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Production of a rescued recombinant monoclonal antibody directed against a steroid hormone and its binding study thanks to Surface Plasmon Resonance imaging technology

A monoclonal antibody (mAb) highly specific to a steroid hormone (undisclosed) of 290 Daltons was analyzed thanks to SPRi technology. This application note highlights the sensitivity of the XelPleXTM system for the detection of small molecules.

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New publication: Antibodies exploration thanks to label-free SPRi

Surface plasmon resonance imaging allows molecules binding study in label-free and real-time conditions. The power of the technique comes from its singularities, which are multiplexing and imaging, leading to a considerable speed-up of the processes’ analyses. This will be illustrated for antibody molecule study by three applications.

This article has been published in the Spring issue of the International Biopharmaceutical Industry (IBI) journal.

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Streamlined SPRi-MS coupling to detect and identify a kinase in Cell lysate using the DARPins as binders

DARPins (Designed Ankyrin Repeat Proteins) are a class of non-immunoglobulin binders. Thanks to their specificity and robustness, they allow a multitude of novel, so far unfeasible applications. Surface Plasmon Resonance imaging (SPRi) is a powerful label-free technique that enables real-time target detection. Combining SPRi to massspectrometry (MS) allows biomolecules identification using their unique peptide mass fingerprint. In the past this combination was cumbersome and time-consuming. This application note shows how a protein kinase (RPS6KA2), a potential drug target is detected and identified using a hyphenated On-Chip SPR-MS coupling protocol, leading to saving time and money.

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Browse Products

More OpenPleX

Manual label-free molecular interaction analysis machine Flexible Research Platform

More XelPleX

Fully automated label-free molecular interaction analysis machine One System for Molecule Screening & Crude Sample Analysis

More SPRi-Arrayer

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