Several years ago an “electronic nose” was developed at Linköping University in Sweden. It was based on a number of different gas sensors and programmed to differentiate between various substances in air. This nose is now being joined by a corresponding sensor for fluids, the “electronic tongue.” The principle behind the “electronic tongue” is that a number of electrodes are submerged in the fluid. When a current is turned on across the electrodes the response varies depending on the liquid’s content of electromagnetically active substances and/or charged particles. The idea is the sensors should be able to be used to monitor quality in the production of fluid products.
In a dissertation, researcher Susanne Holmin has tested the “electronic tongue” on liquid washing detergent and on cultured milk. Her results show that it is important to find the right combination of electrodes of various materials (copper, gold, iridium, silver, platinum, etc.) and various metering methods (metering conductivity, current, and/or voltage) to maximize the information attained.
Before the “tongue” can be used in full scale industrial applications, further development needs to be carried out to ensure that the process functions over the long term, even if the electrodes build up deposits of particles in the fluids. But industries are keenly interested, and a variant of the “tongue” has just started to be tested at a dairy in the southern province of Skåne.
Ingela Björck | alphagalileo
Researchers create new technique for manipulating polarization of terahertz radiation
20.07.2017 | Brown University
Holograms taken to new dimension
19.07.2017 | University of Utah
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
19.07.2017 | Event News
12.07.2017 | Event News
12.07.2017 | Event News
20.07.2017 | Information Technology
20.07.2017 | Materials Sciences
20.07.2017 | Physics and Astronomy