Skip to main content
Tobacco Science & Technology, 2011, 11, p. 36-39., ISSN.1002-0861

Determination of lead in cigarette paper with microwave digestion-graphite furnace atomic absorption spectrometry

ZHANG YOU-MAO(1); ZHAN LEI(2); FANG XI-LING(1); QIU XUE-QING(2); OUYANG XIN-PING(2)
1. Technology Center, China Tobacco Guangdong Industrial Co., Ltd., Guangzhou 510145, P.R. China; 2. School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, P.R. China

A method for determining the lead content in cigarette paper with microwave digestion-graphite furnace atomic absorption spectrometry was developed. Some process variables, including quantities of sample, the composition of digestion agent, ashing temperature, atomizing temperature and matrix modifier were optimized as follows: 4 mL of nitric acid at the concentration of 65%, 2 mL of hydrogen peroxide, and 2 mL of high purity water were used as the digestion agent for 0.3000 g of cigarette paper in the presence of microwave irradiation. And the ashing temperature, atomizing temperature and matrix modifier applied were 700, 1900 °C and 0.10 g/L of ammonium dihydrogen phosphate, respectively. Under the optimum conditions, the detection limit and relative standard deviations were 0.471 µg/L and 1.04%, respectively. The recoveries of 4 kinds of cigarette paper ranged from 97.8% to 105.7%. This method is simple and accurate, features higher sensitivity and recovery and good repeatability, and is suitable for determining the lead content in cigarette paper.