Scientists from Tomsk Polytechnic University have developed a device for the rapid analysis of liquids on the content of hazardous substances - such as heavy metals. Polytechnicers use a method based on polymer optodes - very small plastic matrices that can be made sensitive to specific substances by means of special reagents.
The matrices change color and its intensity depending on the concentration of the substance. The device is mobile, can carry out analysis in situ even at low temperatures, and its cost is many times less than the price of a spectrophotometer - the most used device for chemical analysis.
“The device is based on polymethacrylate sensors - transparent pieces of plastic with thickness of 1 mm and a size of 3x3 mm. The pores of matrices serve as receptacles, where various chemical reactions can undergo. If a matrix is handled with a special reagent it becomes an optode sensitive to a particular substance. We plunge this optode into the water to test it or simply drip a few drops on it, and it changes its color. Hence, there is a required element.
Sergey Muravyov, the scientific supervisor of the project, head of the TPU International Laboratory Advanced Measurements, says: "The more intense the color is, the higher is the concentration of the substance,”
For example, if water contains silver optode turns purple-red. According to the scientist, such a method can detect substances even at very low concentrations in water.
“You dip optode into the water and then load it into the device analyzer. There a special electronic device receives optical signal and converts it into an electric three-channel RGB-signal.
After this signal processing the device outputs the data in digital form on the concentration of the searched substance. The analysis takes place immediately,”
- the project manager says.
This method allows the detection of almost all metals, organic materials and various pharmacological agents in water.
“Our method works with those substances with which interaction leads to color change. Indeed, this is not the whole range of substances. But universal methods do not exist. Today, the most widely used method for chemical analysis is spectrophotometry. A modern spectrophotometer costs about 500 thousand rubles, and it is a bulky stationary device. Our device can achieve the same quality of measurements, but it is compact and can cost about 30 thousand rubles at the market placement,” - he says.
Such a device for rapid analysis is useful for environmental and related services personnel of industrial enterprises. For example, oil companies can use the device for the determination of the tracers in the drilling fluid.
“To date, we have prepared a prototype device, - Sergey Muravyov says. - Now we have set ourselves the task to use this method for a multi-component analysis. The fact is that the reagents that configure optode to a definite substance are sensitive to a few substances.”
Let us add, in 2014 the project research team has received a grant of the Russian Scientific Foundation for up to three years.
The project was funded with the three-year grant of the Russian Scientific Foundation in 2014.
For further information, please contact:
Kristina Nabokova | AlphaGalileo
Joint research project on wastewater for reuse examines pond system in Namibia
19.12.2016 | Technische Universität Darmstadt
Scientists produce a new roadmap for guiding development & conservation in the Amazon
09.12.2016 | Wildlife Conservation Society
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
17.01.2017 | Earth Sciences
17.01.2017 | Materials Sciences
17.01.2017 | Architecture and Construction