文章采用微波消解-电感耦合等离子体质谱（inductively coupled plasma mass spectrometry,ICP/MS）法测定卷烟烟丝及接装纸、卷烟纸、滤棒丝束等卷烟辅材中铬、锰、钴、镍、铜、锌、砷、硒、锶、镉、锡、锑、钡、汞、铅15种重金属元素。采用硝酸/双氧水酸体系微波消解卷烟烟丝、接装纸、卷烟纸及滤棒丝束样品,定容后进行ICP/MS分析。各元素的加标回收率为84.8%-118.6%,检出限为10.9-246.3ng/L。样品的检测结果表明：卷烟的烟丝及辅材中均检出了多种重金属元素,其中接装纸和卷烟纸中各检出11种重金属,其次是烟丝中检出9种,滤棒丝束中检出4种;同一卷烟样品的烟丝及各辅材中,滤棒丝束中检出重金属的种类最少,质量比也最低;卷烟烟丝及辅材中一部分重金属的含量随着卷烟档次的升高呈现一定的增加或减少的趋势;国外卷烟与国产卷烟同类辅材中检出的重金属种类类似。
The thermal decomposition kinetics of three inclusion complexes of βcyclodextrin with cholesterol,sebacic acid,and vanillin was studied by using non-isothermal thermogravimetry.Their average apparent activation energies of the thermal decomposition were obtained.The experimental result indicated that several weak interactions cooperatively contributed to the inclusion complexation of the βcyclodextrin hosts,and the complex thermal stability were dominated by the size/shape-matching between host and guest and hydrogen band interaction,however,the quantitative ratio do not obviously iv the complex thermal stability.
