为了研究国产和进口造纸法再造烟叶的无机添加物的成分和含量差异,采用X射线光电子能谱（X P S）对再造烟叶表面的元素组成进行分析,以获得填料和助燃剂等物质成分的信息,结果显示,所检测的国产和进口再造烟叶的填料主要是碳酸钙,助燃...为了研究国产和进口造纸法再造烟叶的无机添加物的成分和含量差异,采用X射线光电子能谱（X P S）对再造烟叶表面的元素组成进行分析,以获得填料和助燃剂等物质成分的信息,结果显示,所检测的国产和进口再造烟叶的填料主要是碳酸钙,助燃剂成分均为钾盐。然后分别采用化学分析方法和原子吸收光谱法准确分析再造烟叶中的总碳酸钙和水溶性钾,几种国产再造烟叶的总碳酸钙含量为3.48%~5.5%,显著低于进口产品的6.08%;而国产再造烟叶钾含量为1.71%~2.49%,进口产品钾含量为2.02%,低于大部分国产再造烟叶。采用显微镜观察分析了再造烟叶的纤维组织和分散纤维的形态。在进口样品中,宽度小于50μm、长度大于2mm的细长纤维的比例高于国产样品,宽度为200~500μm粗纤维也更为通透,说明纤维解离较好。再造烟叶中的碳酸钙含量高有助于改善片基物理性能,而解离完全的纤维更易于燃烧,使燃烧性能的改善不仅仅依赖于助燃剂的添加量。。展开更多
The Hongzuisi Section in Lanzhou area is used to infer the paleoclimate since the late glacial epoch. Through combined analysis of organic carbon isotope and CaCO3 content, paleoenvironment evolution of Hongzuisi Sect...The Hongzuisi Section in Lanzhou area is used to infer the paleoclimate since the late glacial epoch. Through combined analysis of organic carbon isotope and CaCO3 content, paleoenvironment evolution of Hongzuisi Section since the late glacial epoch is discussed. There were changes in both dry-moist and warm-cold. Especially the climate changes can be compared with synchronous sections of other areas, which provides useful information for our future forecast.展开更多
文摘为了研究国产和进口造纸法再造烟叶的无机添加物的成分和含量差异,采用X射线光电子能谱（X P S）对再造烟叶表面的元素组成进行分析,以获得填料和助燃剂等物质成分的信息,结果显示,所检测的国产和进口再造烟叶的填料主要是碳酸钙,助燃剂成分均为钾盐。然后分别采用化学分析方法和原子吸收光谱法准确分析再造烟叶中的总碳酸钙和水溶性钾,几种国产再造烟叶的总碳酸钙含量为3.48%~5.5%,显著低于进口产品的6.08%;而国产再造烟叶钾含量为1.71%~2.49%,进口产品钾含量为2.02%,低于大部分国产再造烟叶。采用显微镜观察分析了再造烟叶的纤维组织和分散纤维的形态。在进口样品中,宽度小于50μm、长度大于2mm的细长纤维的比例高于国产样品,宽度为200~500μm粗纤维也更为通透,说明纤维解离较好。再造烟叶中的碳酸钙含量高有助于改善片基物理性能,而解离完全的纤维更易于燃烧,使燃烧性能的改善不仅仅依赖于助燃剂的添加量。。
文摘The Hongzuisi Section in Lanzhou area is used to infer the paleoclimate since the late glacial epoch. Through combined analysis of organic carbon isotope and CaCO3 content, paleoenvironment evolution of Hongzuisi Section since the late glacial epoch is discussed. There were changes in both dry-moist and warm-cold. Especially the climate changes can be compared with synchronous sections of other areas, which provides useful information for our future forecast.
