What is it about?
This work describes an innovative method of measuring acidity (pH) locally in liquids. It uses the fluorescence (ability to emit light) of a specific molecule, an arrangement of laser cameras and filters, and image processing methods to make pH visible and measurable in transparent liquids, and under challenging conditions (with bubbles, in fast and strong flows, in large volumes...).
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Why is it important?
Measuring pH in liquid flows is of great importance to better understand the interactions between flows, chemical reactions, and mixing of species. It applies to many fields such as pharmaceutical and chemical industries, where it helps designing more efficient devices and processes, but also in the environmental research on greenhouse gas capture. The method developed in this work makes pH measurements possible in different challenging situations.
Perspectives
We hope that this method will be used or tested by researchers from diverse fields, in various fluids and flows, hopefully also leading to further improvements. Worth mentioning: it provides beautiful visualizations of flow and mixing phenomena!
Tom Lacassagne
University College London
Read the Original
This page is a summary of: Ratiometric, single-dye, pH-sensitive inhibited laser-induced fluorescence for the characterization of mixing and mass transfer, Experiments in Fluids, December 2017, Springer Science + Business Media,
DOI: 10.1007/s00348-017-2475-y.
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