Optimization of chromatographic analysis by using a new composite heat insulation material based on aerogel and a polymer matrix as part of a thermostat of a gas microchromatograph
Abstract
The study presents a comparative assessment of a composite heat insulation material based on evacuated glass microspheres and a polymeric silicone matrix with common heat insulation materials used as a heat insulating layer for microfluidic gas chromatographic columns as part of a gas microchromatograph. It was shown that the developed heat insulation material is characterized by an operating temperature of up to 350°C and a thermal conductivity coefficient of 0.045 W/(m·K). It has been experimentally established that the use of this material as part of a thermostat of a gas microchromatograph allows to reduce energy consumption by 15-25%, increase the resolution of chromatographic peaks by 5-10%, and increase the stability of chromatographic parameters during the contact of the temperature control zones of various units of the microchromatograph by 2-3 times compared with traditional heat insulation materials. The results obtained allow to recommend the studied material for the improvement of microdevices used in gas chromatographic analysis.
Downloads
References
Mikroflyuidnye sistemy dlya himicheskogo analiza / Pod red. Zolotova YU.A., Kurochkina V.E. M. FIZMATLIT. 2011. 528 p. (In Russ.)
Platonov I.A., Platonov V.I., Goryunov M.G. A gas chromatograph based on planar systems. Journal of Analytical Chemistry. 2015; 70(9): 1158-1163.
Platonov I.A., Kolesnichenko I.N., Pavlova L.V. A mobile diagnostics suite for the express quantitative determination of acetine in exhaled breath. Sorbtsionnye i Khromatograficheskie Protsessy. 2022; 22(4): 365-376. (In Russ.) https://doi.org/10.17308/sorpchrom.2022.22/10563
Platonov V., Sharma P., Ledyaev M. etc. Realization of Microfluidic Preconcentrator for N-Pentane Traces Impurities from the Gaseous Media. Materials. 2022; 15(22) 80-90. https://doi.org/10.3390/ma15228090
Platonov I.A., Platonov V.I., Ledyaev M.E. The use of a microthermal desorber for the concentration of trace amounts of hydrocarbons in the air. Sorbtsionnye i Khromatograficheskie Protsessy. 2021; 21(6): 805-811 https://doi.org/10.17308/sorpchrom.2021.21/3825 (In Russ.)
