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Gilbert, John Anthony Stockbridge (1957) An investigation into the neutral constituents of smoke. Doctoral thesis, Sir John Cass College.
This thesis is concerned chiefly with polycyclic aromatic hydrocarbons in tobacco smoke. After a brief discussion on tobacco smoke and its physical and chemical properties, smoking machines used by various workers are reviewed. This is followed by a brief description of the growing and curing of tobacco and ths chemical changes which occur in curing. An account is given of the chemical composition of tobacco and tobacco smoke.
A chapter is devoted to a description of the analytical techniques used in the investigation, and the instruments and materials employed. The improvements in the technique Introduced by the author are explained, together with an outline of the difficulties involved.
A description of experiments on pipe and cigarette smoke, cigarette stubs and ash follows, and conclusions are drawn on the effects of cigarette paper and the lengths of cigarette stubs on cigarette smoke. The detection and determination of nineteen polycyclic hydrocarbons is described, eleven of which had not previously been reported. Some experiments on the temperatures of combustion of tobacco are described.
A chapter on the pyrolysis of ten of the major constitutions of tobacco follows, and this also includes experiments on the effect of heat on some of the gaseous hydrocarbon components of tobacco smoke. It is demonstrated that all these constituents contribute to the polycyclic hydrocarbon content of the smoke.
The thesis closes with a description of experiments on atmospheric pollution and on the polycyclic hydrocarbon content of some highly carcinogenic materials.
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