scholarly journals Assessment of the Thermodynamic Properties of DL-p-Mentha-1,8-diene, 4-Isopropyl-1-Methylcyclohexene (DL-limonene) by Inverse Gas Chromatography (IGC)

2018 ◽  
Vol 56 (8) ◽  
pp. 671-678 ◽  
Author(s):  
Negin Farshchi ◽  
Ali Abbasian ◽  
Kambiz Larijani
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Properties ◽  
Inverse Gas Chromatography

scholarly journals Critical Comments on “Assessment of the Thermodynamic Properties of DL-p-Mentha-1,8-diene, 4-Isopropyl-1-Methylcyclohexene (DL-Limonene) by Inverse Gas Chromatography (IGC)”

2020 ◽  
Vol 58 (5) ◽  
pp. 401-402
Author(s):  
William E Acree
Keyword(s):  
Gas Chromatography ◽  
Thermodynamic Properties ◽  
Vapor Pressure ◽  
Inverse Gas Chromatography ◽  
Thermodynamic Quantities ◽  
Pressure Measurements ◽  
Probe Molecules ◽  
Vapor Pressure Measurements ◽  
Published Paper ◽  
Heats Of Vaporization

Abstract A polemic is given regarding the calculated thermodynamic quantities reported in the published paper by Farschi and coworkers. The graph used to calculate the molar heat of sorption of organic probe molecules onto the liquid DL-limonene stationary phase erroneously plots the reciprocal of the centigrade temperatures, rather than the reciprocal of the Kelvin temperatures. Molar heats of vaporization of the organic probe molecules reported in the paper are abnormally small and are not in accord with published values determined from calorimetric and vapor pressure measurements.

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