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Additively Manufactured Tuneable Flow Resistive Pulse Sensors.pdf (878.46 kB)
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A Tunable 3D Printed Microfluidic Resistive Pulse Sensor for the Characterisation of Algae and Microplastics

preprint
submitted on 05.05.2020 and posted on 08.05.2020 by Mark Platt, Eugenie Hunsicker, Marcus Pollard
Technologies that can detect and characterise particulates in liquids have applications in health, food and environmental monitoring. Here we present a low-cost and high-throughput multiuse counter that classifies a particle’s size, concentration, porosity and shape. Using an additive manufacturing process, we have assembled a reusable flow resistive pulse sensor. The device remains stable for several days with repeat measurements. We demonstrate its use for characterising algae with spherical and rod structures as well as microplastics shed from teabags. We present a methodology that results in a specific signal for microplastics, namely a conductive pulse, in contrast to particles with smooth surfaces such as calibration particles or algae, allowing the presence of microplastics to be easily confirmed and quantified. In addition, the shape of the signal and particle are correlated, giving an extra physical property to characterise suspended particulates. The technology can rapidly screen volumes of liquid, 1 mL/ min, for the presence of microplastics and algae.

History

Email Address of Submitting Author

m.platt@lboro.ac.uk

Institution

loughborough University

Country

UK

ORCID For Submitting Author

0000-0002-9195-7216

Declaration of Conflict of Interest

no conflict of interst

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