SPES / SPES² (Single Particle Extinction and Scattering) patented optical technologies provide access to significantly more information than conventional methods, thanks to a truly multiparametric measurement of the optical properties at a single particle level.

While most techniques deliver one parameter and 1D plots only – typically the size, and under heavy assumptions – SPES / SPES² provides a truly multiparametric 2D / 3D measurement and representation of your samples, allowing a much deeper analysis and an unrivalled capability of discerning different populations.

Physical and statistical information is readily obtained from the 2D / 3D plots coming from SPES / SPES² data, allowing users to quickly and easily isolate specific populations of interest and retrieving their particle size distribution, numerical concentration and oversize analysis.

EOS analytical platforms are a game-changer for studying complex mixtures and diverse heterogeneous systems in industrial, environmental and biological liquids and aerosols and are ideal for a number of applications, including oversize analysis in the presence of impurities, advanced formulation optimization and the monitoring of production scraps and out-of-spec materials.

  •  Related to instruments in the particle size range 100nm - 50µm
  •   High Size   resolution
  •   No Calibration
  •   Suitable for   complex system
  •   Particle   classification
  •   Inline Online
  •   Cost effective

  • SPES/SPES²

  • Single Particle Diffraction (SPD, SPOS)

  • Multiple Particle Diffraction (SLS)

  • Dynamic Light Scattering (DLS)

  • Nanoparticle Tracking Analysis (NTA)

  • Visual Inspection (Microscope, TEM, SEM)

  • Coulter & Similar Tech

Among the several traditional techniques currently in use, optical ones offer unique advantages, and have thus positioned light scattering at the forefront of analytical methods in many scientific and industrial applications.

Unfortunately, the scattering properties of a particle depend on numerous parameters, making basic measurements of scattering intensity – or even extinction, the attenuation of light by a single particle – insufficient for anything beyond a rough size estimate.
The situation gets even worse when dealing with a collection of many scatterers, with the immediate drawback of requiring mathematical inversion and leading to ill-posed problems when interpreting real experimental data.

Traditional optical methods, such as Dynamic Light Scattering (DLS), Static Light Scattering (SLS), and Light Obscuration (LO) rely on heavy and limiting a priori assumptions regarding particle composition, structure, refractive index and on its interaction with the surrounding fluid.

Moreover, both DLS and SLS are based on complex retrieval algorithms that can introduce artefacts in the derived particle size distributions.

SPES / SPES² provide a complete, calibration-free optical fingerprint of the sample (see “SPES/SPES² technologies”). This is achieved through a truly multiparametric approach that minimizes a priori assumptions.
EOS’s proprietary algorithms and dedicated data analysis tools complete the instrument’s ability to discriminate and characterize complex samples, even in scenarios where traditional methods fall short.

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