烟用异型包装纸溶剂残留的测定

Determination of solvent residue in cigarette special-shaped packaging paper

根据YC/T207–2014标准中的要求,在烟用包装纸正面中央区域裁取面积为22 cm×5.5 cm的试样卷成筒装放入顶空瓶内进行溶剂残留分析,但纸张厚度较大的异型烟用包装纸不能按照标准要求放入顶空瓶内检测。为了探究异型包装纸合适的制样标准,通过裁取不同裁样面积、选取不同裁样区域、剥离包装纸的上下表皮复合纸的印刷层及裱贴夹层纸板,并在不同环境存储时包装纸中溶剂残留情况的角度探究考察,确定出一种合适的针对异型包装纸溶剂残留测定的制样方式。结果表明:(1)4种异型包装纸样品中溶剂残留的测定值均随着裁切面积的增加而呈线性增加,但在裁取较小面积时含量较少的化合物会因达不到检出限存在漏检问题。(2)不同裁样区域的每种样品中检测到的溶剂残留的化合物种类基本一致,在主包装面图案较丰富的部位的溶剂残留含量略高。(3)异型包装纸中醇类、酯类溶剂残留物主要存在于夹层纸板间,在上下表皮印刷层中含量较少,但芳香类化合物主要残留在上下表皮印刷层中。(4)样品中溶剂残留随着放置时间的增加,检测含量逐渐减少,在室温下密封放置60 d后样品中测定的溶剂残留基本挥发完,在-18℃下密封放置溶剂挥发情况稍缓。

According to the requirements of YC/T 207–2014,special–shaped cigarette packaging paper with a large paper thickness,which is rolled into a cylinder and placed in a headspace bottle for solvent residue analysis,cannot be cut into a sample with an area of 22 cm×5.5 cm in the central area on the front side of the packaging paper.In order to explore the appropriate sample preparation standard for special-shaped packaging paper,different sample cutting area and cutting regions,peeling off the printed layer of the wrapping paper from the upper and lower layers of the composite paper,laminating sandwich cardboard,and studying the solvent residue in packaging paper in different environments have been discussed in this paper.An appropriate sample preparation method for the determination of solvent residue in special-shaped packaging papers is determined.The results are as follows:(1)The measured values of the solvent residue in the four kinds of special-shaped packaging paper samples increase linearly with the growth of the cutting area,but there is still a missing inspection problem when the cutting area is too small to contain quite a few compounds to be detected.(2)Solvent residue in different sample cutting areas in each sample is detected and the results are basically the same.There is a slightly higher solvent residue in the parts with rich patterns on the main packaging surface.(3)In the special-shaped packaging papers,alcohol and ester solvent residue mainly exists in the interlayer paperboards,and less in the upper and lower epidermal printing layers,while aromatic compounds mainly remain in the upper and lower epidermal printing layers.(4)With the storage time increasing,the solvent residue remained in the sample gradually decreased.The solvent residue in the sample is completely evaporated after the sample is sealed for 60 days at room temperature.When being placed at-18°C,the evaporation of the solvent residue is a little bit slower.