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The sampling and identification of components in volatile organic mixtures

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Chesterman, R. B (1982) The sampling and identification of components in volatile organic mixtures. Coursework Master thesis, University of Tasmania.

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Abstract

Public awareness of the toxic effects of some volatile
organic compounds present in the working and home
environment has created a requirement for the accurate
measurement of the concentration of these substances.
Similar techniques may be used for the examination of the
volatile components of plant material and assist in
determining the optimum economic time for harvesting, and
also provide useful information in the areas of plant-insect
interaction. This thesis examines some of the sampling and
analytical aspects for the determination of trace volatile
organic compounds present in air.
A brief critical review of the literature is presented
describing concentration and trapping techniques, headspace
collection, separation and analytical techniques, detection
and measurement of the separated components and the sources
of error in trace volatile analysis. The development of an experimental sampling system for
volatile organic compounds in air, based on trials conducted
with activated carbon and a porous polymer is presented.
Two methods of sample desorption are described and the
development of sampling equipment based on Tenax GC, thermal
elution with secondary trapping and flash injection into the
inlet of a gas chromatograph is described.
An investigation was conducted into the nature and
origin of an unpleasant lachrimatory component emanating from an industrial furnace, and a number of trapping and
separation techniques were used to determine the nature of
the irritant. The experimental methods used are described,
and conclusions are drawn concerning the suitability of the
various techniques for trace organic volatile sampling.
The steam volatile components of the oil of two
Tasmanian native plants, Drimys lanceolata and Prostanthera
lasianthos are examined using gas chromatography retention
criteria on two columns and mass spectral information. A
comparison of the volatile components of Boronia megastigma
in the flowers, concrete, and.concrete headspace is
described and the application of the technique to the
determination of the optimum time for harvesting, is
outlined.
Changes in the volatile components produced upon injury
of Pinus radiata are examined using headspace traps above
and below the injury and comparisons are made of the
volatile components present in the bark.

Item Type: Thesis (Coursework Master)
Keywords: Chemistry, Organic, Essences and essential oils, Carcinogenicity testing
Copyright Holders: The Author
Copyright Information:

Copyright 1982 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Article on 4 pages in pocket. Thesis (M.Sc.)--University of Tasmania, 1983. Includes bibliographical references

Date Deposited: 25 Nov 2014 00:40
Last Modified: 06 Jul 2016 00:05
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