标记物法测定卷烟搭口胶的施胶量

摘要

为准确测定每支卷烟中搭口胶的施胶量,建立了一种以Zn元素为标记物的卷烟搭口胶施胶量测定方法.将氯化锌标记物加入卷烟搭口胶中,正常制作卷烟后去除卷烟烟丝,截取烟支空筒的卷烟纸部分,经微波消解后,再用ICP-MS法测定标记物锌的质量分数.结果表明:①该方法的检出限为0.021 μg/L,相对标准偏差(RSD)在0.85%~1.35%之间,加标回收率在97.8%~103.4%之间;②在锌离子添加量控制在2.5~6.0 mg/g范围时,施胶量检测结果的相对标准偏差<2.0%;③卷烟搭口胶施胶量测定值与施胶量在线控制系统的设计值基本一致.该方法适用于卷烟搭口胶施胶量的准确测定.%To accurately determine the amount of seam glue in cigarette tobacco rod, a method was developed by using zinc chloride as a marker. The glue containing zinc chloride was applied on the rod seam which was manufactured using routine technical parameters. The cut tobacco in tested cigarettes was removed, and the content of zinc chloride in the remaining cigarette paper tube was determined by ICP-MS after microwave digestion. The results showed that: 1) The detection limit of the method was 0.021 μ g/L, the relative standard deviations (RSDs) and recoveries were in the range of 0.85%-1.35% and 97.8%-103.4%, respectively. 2) The RSD of determined glue amount was less than 2.0% at the zinc ion addition rate of 2.5-6.0 mg/g. 3) The determined amount of seam glue agreed reasonably well with the design value of the glue amount by the online control system. The method is suitable for accurately determining the amount of seam glue in cigarette tobacco rod.