碱熔离子色谱法同时测定烟叶中氯和硫的含量

Simultaneous determination of chlorine and sulfur in tobacco by alkali fusion ion chromatography

用碱熔-离子色谱法同时测定烟叶中氯和硫的含量。采用三因素三水平正交试验设计法确定了样品前处理的最佳条件:加入1%碳酸钠溶液3 mL,马弗炉温度550℃加热2 h,样品冷却后用纯水超声浸提。平均回收率Cl为97.4%,S为105.7%,相对标准偏差Cl为1.71%,S为0.72%。

Optimum sample treatment was obtained by orthogonal experiment design of three factors at three levels. Sam- ples were treated with 3mL 1% Na2CO3 in a muffle furnace at 550~C for 2 h followed by pure water extraction using ul- trasound. Chlorine and sulfur in tobacco were determined simultaneously by alkali fusion ion chromatography. The aver- age recovery of chlorine and sulfur were 97.4% and 105.7% respectively with the RSDs of 1.71% and 0.72%.