Breakthrough characteristics of volatile organic compounds in the -10 to + 170 degrees C temperature range on Tenax TA determined by microtrap technology

Journal of Chromatography. a
Antonín KroupaIvan Víden

Abstract

In this work the breakthrough volumes (BTVs) of volatile organic compounds (VOCs) on Tenax TA were determined in the -10 to 170 degrees C temperature range by using microtrap (MT) technology. The MT technology allowed experimental investigation of the temperature dependence of BTVs. Along with the BTV data, we also discuss the thermodynamics of the temperature dependence of the BTV through a two-parameter equation In (BTV) = A1/T + C1 where T is temperature (K), A1 = -deltaH/R where deltaH is enthalpy of sorption and C1 is constant. This equation fitted well the experimental results with R2 values between 0.9737 (acetone) and 0.9995 (dimethyl disulfide), with n between 6 and 11. However, for n-pentane, n-hexane and 1-hexene it proved that a three parameter equation In (BTV) = A2/ T + BTB + C2 fitted better to the experimental results, with A2 = -deltaHT0/R, B = deltaCp/R, TB = 1n(T/T0) + (T0 - T)/T, C2 a constant, deltaHT0 the adsorption enthalpy at reference temperature T0 and deltaCp the difference in the molar heat capacity of compound under investigation between the sorbed and the free gas phase state. The statistical analysis showed for example for n-pentane now R2 = 0.9969 instead of R2 = 0.9746, and Fisher statistics F =...Continue Reading

References

Aug 15, 2000·Journal of Chromatography. a·M Harper
Mar 30, 2001·Journal of Chromatographic Science·K Héberger, M Görgényi
Aug 31, 2002·Chemosphere·Miklós GörgényiHerman Van Langenhove
Sep 1, 1981·Environmental Science & Technology·G I Senum

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Citations

Dec 16, 2006·Environmental Monitoring and Assessment·Anuj Kumar, Ivan Víden
Sep 21, 2010·Analytica Chimica Acta·Chutarat SaridaraSomenath Mitra
Apr 21, 2017·Journal of Separation Science·Xochitli L Osorio BarajasTorsten C Schmidt
Aug 18, 2009·The Analyst·Chaudhery Mustansar HussainSomenath Mitra
Mar 12, 2020·Lab on a Chip·A EnelB Bourlon
Jun 19, 2009·Environmental Science & Technology·Sudhir Kumar Pandey, Ki-Hyun Kim

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