废旧塑料鉴别方法的初步研究

提出一种快速鉴别塑料品种的方法。通过外观鉴别、燃烧鉴别、溶解性鉴别、密度鉴别、元素鉴别并配合红外光谱分析等仪器分析鉴定通用型废旧塑料。使用该方法,可以快速、简便地鉴别常用的塑料品种,为检验检疫工作带来方便。

Forms of Rare Earth Elements in Soils: Ⅱ. Differentiation of Rare Earth Elements

The present paper deals mainly with the relationships between the distribution of rare earth elements (REE) in different forms in soils and the atomic number and with the odd-even phenomenon in the distribution of ionic lanthanides in soils.The enrichment tendency of light REE relative to heavy REE in soils was pointed out on the experimental results about the proportions of Ce-group and Y-group elements in different REE forms in soils.Meanwhile,the differentiation of Tm in different soil REE forms was compared and the reasons why Tm is enriched in soils were preliminarily discussed.

Coincidence Doppler Broadening Study of Elemental Metals

Twenty pure elemental metal samples have been studied with a coincidence Doppler broadening system （CDB）. The results show the relationship between the CDB spectra and the electronic structure of these samples. The experimental results are compared to simple theoretical predictions, which show that the high-momentum part of the Doppler-broadening spectra can be used to distinguish different elements.

未知聚合物剖析技术研究

本文综述未知聚合物的常用剖析技术,并结合实际经验强调各种剖析技术结合使用,从而提高剖析未知聚合物的准确性。