卷烟纸样品于瓷坩埚中,放入微波灰化系统中在450 ℃灰化20 min,残渣加入体积分数为2.5%盐酸溶液溶解转入50 mL容量瓶中定容后,供原子荧光光谱仪测定卷烟纸中镉的含量。在优化的仪器条件下,镉的质量浓度在0.2~10 μg·L-1范围内与其荧光强度呈线性关系,方法的检出限(3s/k)为0.018 μg·L-1。方法用于分析卷烟纸样品,所得回收率在94.4%~98.4%之间。方法的日内和日间相对标准偏差(n=7)分别为2.2%和2.8%。

Sample of cigarette paper was ignited for 20 min in the microwave ashing system at 450 ℃, and the residue was dissolved with (φ) 2.5% HCl solution. The solution was diluted to 50 mL in a volumetric flask and used for AFS determination of Cd. Under the optimized conditions, linear relationship between values of fluorescence intensity and mass concentration of Cd was obtained in the range of 0.2-10 μg·L-1, with detection limit (3s/k) 0.018 μg·L-1. The proposed method was applied to the analysis of cigarette paper, giving values of recovery in the range of 94.4%-98.4%. Values of intraday and interday RSD′s (n=7) found were 2.2% and 2.8% respectively.