Development of an analytical method for the simultaneous determination of trace metals and mercury in mainstream cigarette smoke by ICP-MS
Usually trace metals and mercury in mainstream smoke are analyzed quantitatively by applying AAS or ICP-AES after trapping of compounds from smoke in each smoking machine and after sample preparation using wet digestion (Health Canada Method). Because of this very time and cost consuming sample preparation, our study was focused on the development of an analytical method for the simultaneously determination of each compound with only less sample preparation. After trapping the trace metals from mainstream smoke in an electrostatic precipitation (EP) tube using an electrostatic collector, the compounds were extracted with methanol. The methanolic extract was acidified with nitric acid and directly applied to ICP-MS, without further sample preparation. Mercury was trapped from smoke using an impinger containing an oxidizing agent (potassium permanganate) and addition of a reducing agent. Trapping of trace metals and mercury was carried out simultaneously. All compounds were determined using ICP-MS. Validation experiments (Linearity, spike recovery tests, reproducibility, etc.) showed that this method was appropriate for the determination of trace metals and mercury in mainstream cigarette smoke. Data obtained by analyzing 3R4F cigarettes are in good agreement with previous analyzed values.