Sonostep Provides Three Functions in One Device

The Sonostep device from Hielscher Ultrasonics provides the ultrasonication, stirring and pumping of samples in one compact design. It is said to be easy to operate and can be used to deliver sonicated samples to analytic devices, such as for particle size measurement. Ultrasonication helps to disperse agglomerated particles for the preparation and analysis of particle dispersions and emulsions. This is important when measuring particle size, for example, by dynamic light scattering or laser light diffraction.

The application of ultrasonic power to a re-circulated sample requires four components: a stirred vessel, an ultrasonic generator, a transducer and a pump. All components are connected by hoses or pipes. The Sonostep integrates ultrasonic power and a centrifugal pump in an agitated stainless steel beaker. Then, the Sonostep is simply connected to the analytical device. The ultrasonication of samples improves the accuracy of particle size or morphology measurement, as the Sonostep performs three functions: de-aeration, circulation and dispersing/de-agglomeration.

The ultrasound de-aerates the liquid and thus prevents micro-bubbles from interfering with the measurement. It circulates the sample volume at an adjustable flow rate and disperses the particles in the liquid. The ultrasonic power is applied directly under the rotor of the pump and ensures that agglomerated particles are getting dispersed before being measured. This leads to more consistent and repeatable results, according to the company.

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