Wyniki wyszukiwania - BazTech

1

Spektroskopia impedancji i zastosowania przemysłowe

Żurek Zbigniew Hilary

Napędy i Sterowanie

|

2023

|

R. 25, nr 1

47--57

PL

[Wprowadzenie] ... W niniejszym opracowaniu przedstawiono metodykę badań defektoskopowych opartą na unormowanych składowych impedancji i pojęciu przenikalności skutecznej, zdefiniowanym historycznie przez Forstera i jego współpracowników [15,16], W zakresie zastosowania w obszarze NDT i SHM występuje w publikacjach autora pod nazwą „spektroskopia impedancji”

2

Tin oxide-titania based electronic system: synthesis, structural, microstructural and dielectric properties

Sahoo Limali, Bhuyan S., Das S.N.

Composites Theory and Practice

|

2023

|

R. 23, nr 4

183--190

EN

SnO2-TiO2, a composite ceramic electronic element was produced by employing a cost-effective and reliable method known as the solid-state synthesis process. The phase, microstructure, chemical composition, and electrical characteristics across a wide frequency range of 1 kHz-1 MHz were evaluated in detail to comprehend this electronic candidate as a capacitive component. The XRD study revealed a polycrystalline tetragonal structure with a crystallite size of 57.9 nm. The SEM micrograph revealed uniformly distributed grains and the calculated average grain size is 0.199 μm. A hydrophilic porous nature was also ascertained from the SEM micrograph. A high dielectric constant (2623) with low dielectric loss (7.5) resulted at the 1 kHz frequency and 400°C. The enhanced capacitive nature was determined by impedance spectroscopy under an extensive frequency and temperature range. The mechanism and nature of conduction at various temperatures were ascertained from the conductivity analysis. The electric modulus characteristics substantiate the non-Debye relaxation of this composite. Based on the comprehensive results, the synthesized component can have prospective applications as a capacitive component for humidity sensors and other electronic devices.

3

Zmodyfikowana metoda impedymetryczna w ocenie zanieczyszczeń mikrobiologicznych piwa niepasteryzowanego

Macioszek Łukasz, Andrzejczak-Grządko Sylwia, Urbaniak Joanna, Dembińska Katarzyna

Przegląd Elektrotechniczny

|

2022

|

R. 98, nr 11

147--150

PL

Zanieczyszczenie mikrobiologiczne piwa skutkuje pojawieniem się szeregu wad produktu. Celem niniejszej pracy było zastosowanie spektroskopii impedancyjnej w ocenie stopnia zanieczyszczenia mikrobiologicznego w produkcji piwa niepasteryzowanego. Uzyskane wyniki wskazują, że pomiary impedancji mogą być szybką metodą oceny stopnia zanieczyszczenia.

EN

The microbiological beer contamination results in a number of product defects. The aim of this study was to use impedance spectroscopy for the microbial contamination degree assessment in the unpasteurized beer production. The results obtained indicate that impedance measurements can be used as a quick method for the contamination degree assessing.

4

Impedance spectroscopy method used for the unpasteurized beer microbiological contamination degree assessment

Macioszek Łukasz, Rybski Ryszard, Andrzejczak-Grządko Sylwia, Konkol Olga

Chemical and Process Engineering

|

2022

|

Vol. 43, nr 4

461-–469

EN

The main aim of the below presented work was to investigate the possibility of using impedance spectroscopy in the unpasteurized beer microbial contamination degree assessment. Advantages of the impedance spectroscopy method, a negligible number of similar published results as well as their practical aspect make the research important. Four different types of beers were investigated which were unfit for consumption due to improper storage and were heavily microbiologically contaminated. Their impedance was measured in the frequency range from 0.1 Hz to 1 kHz before and after centrifugation. Based on the measured values, an innovative electrical equivalent circuit was proposed and the parameters of the circuit elements were fitted. The obtained results show significant differences (23 up to 35%) in the values of resistance modelling the diffusion phenomenon. Such large changes, resulting from the removal of biomass from the samples, prove the validity of impedance spectroscopy in the study of the properties of unpasteurized beer. According to the authors, it would be possible to use the proposed methodology during the production of beer. With some limitations, it should aid in the early detection of microbial contamination.

5

Mechanisms of electrical conductivity, quantum capacity and negative capacitance effects in InSe (PTHQ) nanohybrid

Ivashchyshyn Fedir, Maksymych Vitaliy, Calus Dariusz, Klapchuk Myroslava, Baryshnikov Glib, Galagan Rostislav, Litvin Valentina, Chabecki Piotr, Bordun Ihor

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2022

|

Vol. 70, nr 1

art. no. e139958

EN

In this work, we present findings on the syntheses and study of properties of InSe < PTHQ > nanohybrid. The introduction of guest component in GaSe matrix leads to an increase in inhomogeneities, which is clearly confirmed by the strengthening of the low-frequency horizontal branch of Nyquist diagrams. A constant magnetic field counteracts this effect and changes the behavior of the impedance hodograph at low frequencies to the opposite. Illumination leads to a colossal increase in quantum capacitance, which is clearly demonstrated in the Nyquist diagram. For the synthesized InSe < PTHQ > nanohybrid the interesting behavior of the current-voltage characteristic is reported. As a result of studies of the synthesized InSe < PTHQ > nanohybrid the effect of “negative capacity” is observed, the magnitude of which can be controlled by the electric field. Based on the constructed impedance model and proposed N-barrier model, the physical mechanisms of the investigated processes are suggested.

6

Effect of optical illumination and magnetic field on the electroconductive and polarization properties of clathrate GaSe>, synthesized under lighting

Ivashchyshyn Fedir, Maksymych Vitaliy, Calus Dariusz, Matulka Dariya, Chabecki Piotr, Kunynets Andrii

Bulletin of the Polish Academy of Sciences. Technical Sciences

|

2022

|

Vol. 70, nr 5

art. no. e143104

EN

GaSe(CS(NH2) 2(C14H10) clathrate with a hierarchical subhosthhosthguestii type architecture was formed under illumination and its electrically conductive properties were studied. The method of impedance spectroscopy studied the frequency behavior of the real and imaginary parts of the complex total impedance in the range of 10 -3-10 6 Hz. The measurements were performed under normal conditions, in a permanent magnetic field (220 kA/m), or under light illumination (for a standard solar spectrum AM 1.5 G total available power is 982 W/m 2). The structure of the impurity energy spectrum at the Fermi level was investigated by the method of thermostimulated discharge in the temperature range from 240 to 340 K. Using Jebol-Pollack theoretical approaches based on impedance spectra, the parameters of the impurity energy spectrum were calculated, such as the density of states at the Fermi level, the jump radius , the scatter of trap levels near the Fermi level and the real density of deep traps. As evidenced by studies, illumination during clathrate synthesis, forms an internal electret polarization, which leads to abnormal behavior of the photoresistive effect and to the appearance of the memristive effect. The imposition of a permanent magnetic field during the measurement of complex resistance leads to the appearance of quantum capacitance.

7

Influence of environmental exposures on electrical parameters of low voltage surge arresters

Pająk Piotr, Szafraniak Bartłomiej, Dąda Anna

Przegląd Elektrotechniczny

|

2020

|

R. 96, nr 1

56--59

EN

Low voltage surge arresters work in a very different environmental conditions. During the exploitation, under the influence of environmental exposures, the structure of metal oxide surge arresters (MOSA) is gradually degraded. These processes can change their protective properties and lead to a reduction in the effectiveness of surge protection. The aim of the paper is to analyze the influence of environmental exposures on the electrical parameters of low voltage surge arresters.

PL

Warunki środowiskowe w jakich pracują niskonapięciowe ograniczniki przepięć są bardzo zróżnicowane. Podczas eksploatacji, pod wpływem narażeń środowiskowych, struktura ograniczników przepięć ulega stopniowej degradacji. Procesy te mogą powodować zmiany parametrów elektrycznych ograniczników i prowadzić do zmniejszenia skuteczności ochrony przeciwprzepięciowej. Celem referatu jest analiza wpływu narażeń środowiskowych na parametry elektryczne niskonapięciowych ograniczników przepięć.

8

Impedance spectroscopy in H2 sensing with TiO2/SnO2 nanomaterials

Szafraniak Bartłomiej, Kusior Anna, Radecka Marta, Zakrzewska Katarzyna

Metrology and Measurement Systems

|

2020

|

Vol. 27, nr 3

417--425

EN

Alternating current a.c. measurements enable to understand the physical and chemical processes occurring in semiconductor materials. Impedance spectroscopy has been successfully applied to study the responses of gas sensors based on metal oxides, such as TiO2, SnO2 and TiO2/SnO2 nanocomposites. This work is devoted to dynamic measurements of hydrogen sensor behaviour over the temperature range of 300-450°C. Frequency dependence of the impedance signal gives evidence that 50 mol% TiO2/50 mol% SnO2 nanocomposites should be treated as resistive-type sensors. Temporal evolution of the response to 500 ppm H2 at 320°C indicates a very short response time and much longer recovery.

9

The Influence of the Microstructural Evolution on the Corrosion Resistance of Cold Drawn Copper Single Crystals in NaCl

Koralnik M., Dobkowska A., Adamczyk-Cieslak B., Mizera J.

Archives of Metallurgy and Materials

|

2020

|

Vol. 65, iss. 1

55--64

EN

The aim of the present work was to determine the influence of the microstructural evolution of copper single crystals with the initial orientations of <001> and <111> after cold drawing on their corrosion resistance. Transmission electron microscopy, X-ray diffraction, and electron backscattering diffraction were used to characterize the microstructural changes. To evaluate the corrosion resistance after deformation, open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization analyses were conducted. The microstructural observations showed the presence of dislocation cell structures and shear bands indeformed sample with initial orientation <001> single crystal, as well as a strongly-developed substructure in sample <111>. The material with initial orientation of <001> was more resistive in analyzed medium than material with the initial orientation of <111>.

10

Modelling of Dielectric Properties of BiNbO4-Based Microwave Ceramics

Czekaj D., Lisińska-Czekaj A., Garbarz-Glos B., Bąk W.

Archives of Metallurgy and Materials

|

2020

|

Vol. 65, iss. 3

1177--1181

EN

In the present paper results of the studies devoted to computer simulations of dielectric response of electroceramics in a frequency domain as well as analysis of the experimental data are given. As an object of investigations BiNbO4-based microwave ceramics was taken. Simulations of the hypothetical impedance response of the ceramic system were performed under assumption of the brick-layer model. A strategy for analysis and modelling of the impedance data for microwave electroceramics was discussed. On the base of the discussed strategy modelling of the dielectric response of BiNbO4 ceramics was performed with the electric equivalent circuit method. The Voigt’s and Maxwell’s circuits were taken as electric models. Parameters of the electric components of the circuits were determined and related to parameters of the ceramic object under study. It was found that fitting quality was good and changed within the range χ2 = 6.78 × 10-4 – 6.77 × 10-5 depending on the model.

11

Influence of Lanthanum Dopant on the Structure and Electric Properties of BaBi2Nb2O9 Ceramics

Adamczyk-Habrajska M., Goryczka T., Szalbot D., Dzik J., Rerak M., Bochenek D.

Archives of Metallurgy and Materials

|

2020

|

Vol. 65, iss. 1

207--214

EN

The paper reports the consequences of lanthanum modifications of barium bismuth niobiate (BaBi2 Nb2 O9) ceramics. The discussed materials were prepared by solid state synthesis and a one-step sintering process. The investigations are focused on dielectric aspects of the modification. The presented results reveal that the trivalent lanthanum ions incorporate twovalent barium ions, which is connected with the creation of A-site cationic vacancies as well as oxygen vacancies. Such a scenario results in significant decreasing in grain boundaries resistivity. The activation energy of grain boundaries conductivity is significantly reduced in the case of lanthanum admixture.

12

Zastosowanie komputerowych kart pomiarowych do realizacji wirtualnego analizatora widma impedancyjnego

Augustyn Małgorzata, Dorozhovets Mykhaylo

Przegląd Elektrotechniczny

|

2019

|

R. 95, nr 7

110--114

PL

W artykule przedstawiono stanowisko pomiarowe do badania spektroskopii impedancyjnej bazujące na kartach USB-6003 i Personal DAQ/3000. W środowisku LabVIEW 2013 opracowano wirtualny spektroskop składający się z generatora fali sinusoidalnej oraz dwukanałowego rejestratora sygnałów na wejściach różnicowych karty pomiarowej. Opracowana aplikacja zapisuje zarejestrowane wartości do pliku, a następnie odpowiedni algorytm wylicza impedancję obiektu oraz jej składowe. W pracy przedstawiono przykładowe wyniki analiz oraz ich niepewności.

EN

The paper presents a test stand for impedance spectroscopy based on a USB-6003 and Personal DAQ/3000 card. A virtual spectroscope consisting of a sinus generator and a two-channel recorder has been developed in LabVIEW 2013 environment. This application saves the recorded values to the file and the algorithm calculates the impedance of the object and its components. Results of analyses and their uncertainties are also presented.

13

Zastosowanie metody spektroskopii impedancyjnej do szacowania bardzo małych zawartości wody w oleju mineralnym typu 20-70

Macioszek Ł., Matuszak M., Wagner P., Włodarczak S.

Przegląd Elektrotechniczny

|

2018

|

R. 94, nr 12

60--63

PL

W pracy podjęto próbę oceny możliwości stosowania metody spektroskopii impedancyjnej do szacowania bardzo małych zawartości wody (do 0,02% V/V) w oleju mineralnym o oznaczeniu 20-70. Wcześniejsze badania olejów napędowych potwierdzały taką możliwość, jednak brak możliwości szerszego porównania otrzymywanych wyników skłonił autorów do zbadania innego oleju w ten sam sposób. Przedstawione wyniki pozwalają stwierdzić, że obrana metodologia daje pozytywne rezultaty także w przypadku badanego oleju mineralnego.

EN

In the paper an attempt was made to experimentally verify the possibility of using impedance spectroscopy method for 20-70 type mineral oil moisture assessment. Previous tests’ findings showed that this method can be successfully used with diesel fuel. However, the lack of possibility to compare the obtained results, prompted the authors to investigate another oil in the same way. Tests presented in the paper show that even water quantities below 0,02% V/V can change electrical properties of mineral oil in a way that can be detected with the use of proposed methodology.

14

Multisensors for whole-cell analytics

Tobehn-Steinhäuser I., Günther M., Görlandt S., Herbs S., Wünscher H., Ortlepp T., Gerlach G.

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

|

2018

|

T. 8, nr 2

39--41

EN

Whole-cell biosensors, which can be used in the environmental protection and process measuring technology, in the biotechnology, food and pharmaceutical industry for the on-line control and monitoring of chemical and biochemical processes and for the fast detection of small amounts of solutes, are of great interest. These kind of biosensors comprise microorganisms like genetically modified yeast cells, which react on a specific stimulus, e.g. a residual amount of drugs in the measurement medium with a dependent fluorescence. The receptors of the cells detect specific signal molecules and stimulate the organism to produce a fluorescent protein. In this work, a combined impedimetric-optical read out was used, which can provide the reliable and long-term stable detection of a fluorescence signal accompanied by impedance measurements monitoring cell vitality and activity. A new challenge thereby is a special sensor design which enables the integration of excitation source, photodetector, interdigitated electrodes, and the fluidic system with an effective and long-term-stable packaging.

PL

Biosensory pełnokomórkowe cieszą się bardzo dużym zainteresowaniem. Mogą one być wykorzystywane w ochronie środowiska i technologii pomiaru procesów, w branży biotechnologicznej, spożywczej i farmaceutycznej do kontrolowania i monitorowania procesów chemicznych i biochemicznych on-line oraz do szybkiego wykrywania niewielkich ilości substancji rozpuszczonych,. Tego rodzaju biosensory obejmują mikroorganizmy, takie jak genetycznie zmodyfikowane komórki drożdży, które reagują na specyficzny bodziec, np. fluorescencją na resztkowa ilość leków w pożywce pomiarowej. Receptory komórek wykrywają określone cząsteczki sygnałowe i stymulują organizm do wytwarzania białka fluorescencyjnego. W pracy wykorzystano łączony odczyt impedancyjno-optyczny, który może zapewnić niezawodną i długotrwale stabilną detekcję sygnału fluorescencyjnego, któremu towarzyszą pomiary impedancji monitorujące żywotność i aktywność komórek. Nowym wyzwaniem jest specjalna konstrukcja czujnika, która umożliwia integrację źródła pobudzenia, fotodetektora, elektrod palcowych i układu płynowego w jednej obudowie.

15

Determination of electrophysical and structural properties of human cancellous bone and synthetic bone substitute material using impedance spectroscopy and X-ray powder diffraction

Haba Y., Köckerling M., Shick Ch., Mittelmeier W., Bader R.

Acta of Bioengineering and Biomechanics

|

2018

|

Vol. 20, no. 1

11--19

EN

Electrophysical stimulation is used to support fracture healing and bone regeneration. For design optimization of electrostimulative implants, in combination with applied human donor bone or synthetic bone scaffolds, the knowledge of electrophysical properties is fundamental. Hence further investigations of the structural properties of native and synthetic bone is of high interest to improve biofunctionality of bone scaffolds and subsequent healing of the bone defect. The investigation of these properties was taken as an objective of this study. Therefore, surgically extracted fresh cylindrical and consecutively ashed cancellous bone samples from human osteoarthritic femoral heads were characterized and compared to synthetic bone substitute material. Thereby, impedance spectroscopy is used to determine the electrophysical properties and X-ray powder diffraction (XRD) for analysis of structural information of the bone samples. Conductivity and permittivity of fresh and ashed cancellous bone amounted to 1.710–2 S/m and 7.5106 and 210–5 S/m and 7.2103 , respectively. Electrical conductivity and dielectric permittivity of bone scaffold resulted in 1.710–7 S/m and 49. Analysis of the structural properties showed that the synthetic bone scaffolds made of Brushite exhibited some reflections which correspond to the native bone samples. The information in present study of the bone material (synthetic and autologous) could be used for later patient individual application of electrostimulative implants.

16

Numerical analysis and experimental verification of the electrical impedance tomography method for monitoring of the packed-bed drying process

Porzuczek J.

Transactions of the Institute of Fluid-Flow Machinery

|

2017

|

nr 136

23--33

EN

This paper presents a method for online determination the spatial distribution of the moisture content in material being dried. It might be essential for monitoring and optimal control of the drying processes. The proposed method utilizes electrical impedance tomography. As the exemplary material for experimental research the black chokeberry (Aronia melanocarpa) was used. The relationship between electrical impedance of chokeberry and its moisture content was determined for wide range of frequency (0.02200 kHz). Experimental studies of the spatial distribution of the moisture content was performed in the cylindrical vessel equipped with 8-electrode circumferentially arranged. Voltage signal from the electrodes was acquired simultaneously using high-speed data acquisition module. Due to high impedance of the chokeberries, exceeding 109 Ω for dried matter, extraordinary instrumentation for stimulus sourcing and current measurement was necessary to be applied. On the other hand, raw chokeberries are characterized by several orders of magnitude lower impedance (103104 Ω), especially for high frequency. Wide range of observed impedance was able to be measured owing to use of the voltage stimulation instead of the current stimulation. The image reconstruction problem was solved using iterative Gauss-Newton algorithm in the electrical impedance and diuse optical tomography software package. The obtained results has shown satisfactory ability to localize insuciently dried part of the material. It was proved, that strong dependence between moisture content in chokeberries and its impedance in whole frequency range provides more meaningful information than simple resistance or capacitance measurement. Prospect for the improvement of the spatial resolution of humidity imaging was also discussed.

17

Wpływ na wyniki pomiarów impedancyjnych wzajemnego usytuowania przeciwelektrody i pręta zbrojeniowego jako elektrody badanej w syntetycznej cieczy porowej betonu

Pamuła M., Jaśniok M.

Ochrona przed Korozją

|

2017

|

nr 8

255--261

PL

W artykule analizowano realne sytuacje pomiarowe, które mogą wystąpić podczas badań diagnostycznych szybkości korozji stalowego zbrojenia w konstrukcji betonowej. W celu uniknięcia wpływu na wyniki pomiarów niejednorodności struktury betonu, w badaniach beton odwzorowano syntetyczną cieczą porową o pH = 13,4. Pomiary prowadzono metodą elektrochemicznej spektroskopii impedancyjnej w układzie trójelektrodowym. Elektrodą badaną był stalowy pręt zbrojeniowy średnicy 22 mm ze stali gatunku RB500. Przeciwelektrodę wykonano z blachy odpornej na korozję, a jako elektrodę referencyjną zastosowano Cl–/AgCl,Ag. W badaniu uwzględniono pięć wzajemnych, niesymetrycznych usytuowań przeciwelektrody z elektrodą referencyjną względem elektrody badanej. Jako dodatkowe zmienne parametry układu przyjęto trzy różne odległości badanego pręta od przeciwelektrody oraz trzy zróżnicowane szerokości przeciwelektrody. Analiza wyników wykazała istnienie bardzo wyraźnego wpływu na przebiegi widm impedancyjnych względnego przesunięcia między elektrodą badaną i przeciwelektrodą, natomiast zmienność pozostałych dwóch parametrów geometrycznych układu można uznać za mniej istotną.

EN

This paper presents the analysis of real measuring situations which can occur while conducting diagnostic tests on corrosion rate of steel reinforcement in a concrete structure. For the purpose of this research, concrete was modelled with synthetic pore solution with pH = 13.4 to avoid the impact of non-homogeneous structure of concrete on test results. Measurements were performed by electrochemical impedance spectroscopy in a three-electrode setup. A working electrode was a steel rebar with a diameter of 22 mm, made of steel grade RB500. A counter electrode was made of stainless steel, and Cl–/AgCl,Ag electrode was used as a reference electrode. The tests included five unsymmetrical arrangements of the counter electrode and the reference electrode against the working electrode. Three different distances between the tested rebar and the counter electrode and three different widths of the counter electrode were assumed as additional variable parameters of the setup. The analysed results indicated a very significant effect of the relative displacement between the working electrode and the counter electrode on shapes of impedance spectra. Variability of other two geometrical parameters seemed to be less important.

18

Impedance Sensors Made in PCB and LTCC Technologies for Monitoring Growth and Degradation of Pseudomonal Biofilm

Chabowski K., Junka A. F., Piasecki T., Nowak D., Nitsch K., Smutnicka D., Bartoszewicz M., Moczała M., Szymczyk P.

Metrology and Measurement Systems

|

2017

|

Vol. 24, nr 2

369--380

EN

The suitability of low-cost impedance sensors for microbiological purposes and biofilm growth monitoring was evaluated. The sensors with interdigitated electrodes were fabricated in PCB and LTCC technologies. The electrodes were golden (LTCC) or gold-plated (PCB) to provide surface stability. The sensors were used for monitoring growth and degradation of the reference ATCC 15442 Pseudomonas aeruginosa strain biofilm in invitro setting. During the experiment, the impedance spectra of the sensors were measured and analysed using electrical equivalent circuit (EEC) modelling. Additionally, the process of adhesion and growth of bacteria on a sensor’s surface was assessed by means of the optical and SEM microscopy. EEC and SEM microscopic analysis revealed that the gold layer on copper electrodes was not tight, making the PCB sensors susceptible to corrosion while the LTCC sensors had good surface stability. It turned out that the LTCC sensors are suitable for monitoring pseudomonal biofilm and the PCB sensors are good detectors of ongoing stages of biofilm formation.

19

The impact of phase state of guest histidine on properties and practical applications of nanohybrids on InSe and GaSe basis

Ivashchyshyn F. O., Grygorchak I. I., Balaban O. V., Seredyuk B. O.

Materials Science Poland

|

2017

|

Vol. 35, No. 1

239--245

EN

A new technological approach to the synthesis of multilayer nanostructures which allows their use in high-performance storage of electrical energy at the nanoscale level is discussed in this paper. In particular, the effect of co-intercalation of histidine (his), water and a solution of KOH into layered semiconductors of GaSe and InSe on the charge accumulation are studied. Based on the data of the cyclic current-voltage characteristics (CVC) a power storage mechanism (capacitive/pseudocapacitive) in each of these structures is described. This mechanism is in a good accord with the results of galvanostatic studies. The simulation of the parameters of the impedance equivalent circuit has been carried out, proving the possibility of using the described structures for nanoelectronics and nanoenergy devices. The observed values of tangent of electrical losses tgδ (<1) in coherence with a high dielectric constant ε are promising for the creation of quantum batteries and capacitors.

20

Model czujnika poziomu glukozy we krwi opartego na metodzie spektroskopii impedancyjnej

Głuchowska Ż., Osiecka I., Pałko T., Łukasik W., Dudziński K., Pijanowska D.

Elektronika : konstrukcje, technologie, zastosowania

|

2017

|

Vol. 58, nr 1

31--33

PL

Dokładność i szybkość określania poziomu glukozy we krwi jest szczególnie istotna w przypadku osób chorych na cukrzyce. Ze względu na dyskomfort pacjenta związany z pobieraniem próbki przy zastosowaniu dostępnych handlowo urządzeń istnieje duże zapotrzebowanie na skonstruowanie bardziej przyjaznego i równie dokładnego czujnika poziomu glukozy we krwi. Jedną z obiecujących metod stanowi spektroskopia impedancyjna. Artykuł prezentuje projekt i konstrukcję modelu czteroelektrodowego czujnika glukozy. W toku doświadczeń wykazano zmiany modułu impedancji wodnych roztworów z glukozą w funkcji stężeń glukozy występujących w ludzkiej krwi.

EN

The accuracy and the speed of determining the level of glucose in the blood is particularly important for people with diabetes. Because of patient discomfort associated with sample collection using a commercially available devices, there is a great need to construct a more favorable and precise sensor of blood glucose level. One of the promising method is an impedance spectroscopy. The article presents the design and construction of the glucose sensor model. In the course of experiments changes of impedance modulus of aqueous solutions of glucose versus glucose concentration present in human blood has shown.