Results show that the heavy metal stabilizer and the residual vinyl chloride monomer in the waterpipe can distribute into the water, their laws can be described by some experiment formulas.
结果表明：聚氯乙烯给水管中重金属稳定剂和残留的氯乙烯单体会扩散入水中，其规律性可分别用一组经验方程式表示。
The distribution and heat stability of nitrogen in coal tar refined soft pitch were discussed by element analysis,and unstable nitrogen was analyzed by IR.
以高温煤焦油为原料,经蒸馏、溶剂萃取沉降以制得煤焦油精制软沥青,再经溶剂索氏提取制备族组成;通过元素分析来研究杂原子氮的分布和热稳定性,通过红外光谱(IR)鉴别不稳定性氮基团的结构。