Tobacco powder was digested in HNO3-H2O2 under microwave radiation,and then determined by GF-AAS with deducted background automatically Zeeman and took NH4H2PO4 as an improver.

• 采用硝酸-过氧化氢体系微波消解,而后以磷酸二氢铵作化学改进剂,利用塞曼自动扣除背景,采用石墨炉原子吸收法测定了部分烟草样品的铅含量。