Activity Concentrations Of 210Po In Philippine Cigarettes

Abstract

The tobacco was separated from the cigarette filter and wrapper. The tobacco samples were put in oven and dried to constant weight at 105 ◦C. The sample was mixed to achieve homogeneity by using a mortar and pestle. 2.0 g of dried tobacco was put in a beaker, 0.1 mL of 209Po tracer (0.105 Bq) (Standard Reference Material 4326, National Institute of Standard and Technology, USA) was added to the dried material. The dried samples were put on a hot plate (90—95 ◦C) with 10 mL HNO3 (60% weight/weight) and 10 mL HCl (35% weight/weight). Occasionally, a few drop of H2O2 (30% weight/weight) and octanol (98% weight/weight) was added to the sample. When approaching near dryness, 20 mL HCl (35% weight/weight) was added.
Introduction