Enthalpy of Solution and Kovats Retention Indices for Nitroaromatic Compounds on Stationary Phases using Gas Chromatography

Published

April 30, 2009

Author(s)

Jeffrey A. Caufield, Thomas J. Bruno, Keith Miller

Abstract

Worldwide terrorism has recently resulted in increased efforts to detect and identify explosive residues. Availability of experimentally determined thermochemical data for explosive compounds and their degradation products are limited, however. Gas chromatography was used to determine the enthalpy of solution, H_Sol, for a series of nitroaromatic explosives and explosive degradation products including nitrobenzene, 2-nitrotoluene, 3-nitrotoluene, 4-nitrotoluene, 1,2-dinitrobenzene, 1,3-dinitrobenzene, 1,4-dinitrobenzene, 2,4-dinitrotoluene, 2,6-dinitrotoluene, 3,4-dinitrotoluene, 3,5-dinitrotoluene, 1,3,5-trinitrobenzene and 2,4,6-trinitrotoluene. Four polar stationary phases, namely 80 % dimethyl 20 % diphenyl polysiloxane, 14 % cyanopropylphenyl 86 % dimethyl polysiloxane, 50 % phenyl 50 % methyl polysiloxane and polyethylene glycol were evaluated with the 13 nitroaromatic compounds. Isothermal Kovats retention indices are also reported for the nitroaromatics as well as the H_Sol of several n-alkanes. Enthalpies reported herein were computed over a wide temperature range, thus net retention volumes are also tabulated to facilitate the specific needs of interested readers.

Citation

Journal of Chemical and Engineering Data

Volume

54

Pub Type

Journals

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Keywords

adsorption, enthalpy, explosives, nitroaromatics

Citation

Caufield, J. , Bruno, T. and Miller, K. (2009), Enthalpy of Solution and Kovats Retention Indices for Nitroaromatic Compounds on Stationary Phases using Gas Chromatography, Journal of Chemical and Engineering Data, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=832369 (Accessed July 20, 2024)