Studies of Cigarette Smoke Transfer Using Radioisotopically Labelled Tobacco Constituents

An apparatus for the preparation of radiolabelled cigarettes is described. The apparatus dispensed a fixed volume of liquid from a hypodermic syringe, the volume being controlled by a gear-driven micrometer assembly. The liquid was deposited along the axis of an intact cigarette as the latter was withdrawn from the syringe needle at a uniform rate. The distribution of added radioactive materiaI within the tobacco rod was checked and shown to be uniform.