微波消解-ICP-MS法测定卷烟纸中主要元素和重金属元素

Determination of essential elements and heavy metal elements in cigarette paper by microwave digestion-ICP-MS

建立了卷烟纸中5种主要元素和6种重金属元素的电感耦合等离子体质谱测定方法,优化了样品前处理方法,考察了普通卷烟纸和彩色卷烟纸中5种主要元素和6种重金属元素的含量水平。结果表明:采用HNO_3和H_2O_2消解体系能够将卷烟纸完全消解,方法定量限在0.010~0.053mg/kg之间,样品加标回收率为93%~107%,精密度(RSD)小于6.7%。该方法样品前处理简单快速、结果准确可靠,适合于卷烟纸中Na、Mg、K、Ca、Ti、Cr、Ni、As、Cd、Hg和Pb的测定。

An analytical method was developed for determining five essential elements（Na,Mg,K,Ca and Ti）and six heavy metal elements（Cr,Ni,As,Cd Hg and Pb）in cigarette paper by microwave digestion and inductively coupled plasma-mass spectrometry（ICP-MS）.The acid system for sample digestion was optimized,and the contents of the 11 elements above in conventional cigarette paper and color cigarette paper were investigated.The results showed that cigarette paper was completely digested with 6 mL HNO3 and 2 mL H2O2 by microwave digestion.The limits of quantitation were in the range from 0.010 mg/kg to 0.053 mg/kg while the recoveries were from 93% to 107% ,and the relative standard deviation was below 6.7% （n=6）.This method is simple,accurate,and suitable for the determination of the essential elements and heavy metal elements in cigarette paper.