烟用接装纸样品1.000 g置于50 mmol·L^-1氢氧化钠溶液15 mL中回旋振荡提取2 h，过滤。取其提取液0.5 mL，用0.1 mol·L^-1盐酸溶液中和至pH 7.0后，加入0.1 mol·L^-1 Na₂-EDTA溶液5 mL，在80℃条件下反应20 min。所得溶液进行色谱分离，用Dionex AS19色谱柱为固定相，用pH 7.0的0.15 mol·L^-1硝酸铵溶液作为流动相。在质谱分析中，用氦气作为碰撞气，可减小³⁵Cl¹⁶O¹H⁺、⁴⁰Ar¹²C⁺对⁵²Cr⁺的质谱干扰。结果表明：Cr（Ⅲ）和Cr（Ⅵ）的线性范围依次为20.0~1 000 μg·L^-1，0.20~10.0 μg·L^-1，检出限（3s）分别为4.81，0.63 μg·kg^-1。在3个浓度水平上进行加标回收试验，测得两者的回收率依次在95.2%~104%和80.0%~116%之间，测定值的相对标准偏差（n=7）依次在2.5%~3.1%和2.6%~3.6%之间。

Sample of cigarette tipping paper 1.000 g was extracted with 15 mL of 50 mmol·L^-1 NaOH solution by vortical oscillation for 2 h and then filtered. The extract (0.5 mL) was separated and neutralized with 0.1 mol·L^-1 HCl solution to pH 7.0. After addition of 5 mL of 0.1 mol·L^-1 Na₂-EDTA solution, the extract was kept at 80℃ for 20 min, and the solution was separated chromatographically by using Dionex AS19 column as the stationary phase, and 0.15 mol·L^-1 NH₄NO₃ solution (pH 7.0) as the mobile phase. In ICP-MS analysis, helium was used as the collision gas so as to reduce the MS interference of ³⁵Cl¹⁶O¹H⁺ and ⁴⁰Ar¹²C⁺ to ⁵²Cr⁺. Linearity ranges were found 20.0-1 000 μg·L^-1 for Cr(Ⅲ) and 0.20-10.0 μg·L^-1 for Cr(Ⅵ) with values of detection limits (3s) of 4.81, 0.63 μg·kg^-1 respectively. Test for recovery was made by standard addition method at 3 concentration levels, giving results in the range of 95.2%-104% for Cr(Ⅲ), and 80.0%-116% for Cr(Ⅵ), with RSDs (n=7) in the range of 2.5%-3.1% for Cr(Ⅲ), 2.6%-3.6% for Cr(Ⅵ).