This paper presents a new and rapid method to determine fluorine in tobacco and in smoke. To determine fluorine in tobacco, auxiliary combustible adhesive paper is wrapped round the tobacco sample and the sample is ignited using the Oxygen Flask Method. Fluorine is detected using Gran's fluoride electrode coupled to a mini computer. To determine fluorine in smoke, the smoke from the smoking machine is passed through two solutions in series, 0.01 M NaOH and 0.01 M HCl, which absorb the fluoride components. The fluoride content of the solutions is then determined. Recovery of fluoride by this method is 96.5%-103.1% for sample fluoride concentrations in the range of 10^-6 M - 10^-5 M . The method is simple, rapid and sensitive for determining the low levels of fluorine.