柴油机排气颗粒中有机组分的分离方法及微量金属的测定

FRACTIONATION METHOD OF THE SOLUBLE ORGANIC FRACTION OF DIESEL EXHAUST PARTICULATES AND THE MEASUREMENT OF TRACE METAL IN DIESEL EXHAUST PARTICULATES

采用柱层析和化学方法将柴油机颗粒有机可溶成分按化学和物理性质分为有机碱、有机酸、脂肪类有机物、芳烃化合物、中极性有机物、高极性有机物 6大类 ,并测定这些有机物质的百分组成及回收率 .同时 ,使用等离子发射光谱法 (ICP- AMS)分析了颗粒中金属物质的种类及相应的含量 。

The soluble organic fractions in diesel exhaust particulates were classified into organic bases,organic acids,aliphatic compounds,aromatic compounds,moderately polar neutral compounds and highly polar neutral compounds by silica gel column chromatography and chemical methods,and the percentage of these organic compunds and the recovery of soluble organic fractions were measured.Meanwhile,the ICP-AMS was used to determine the trace and contents of metals kinds in dieel exhaust particulates.According to the experimental results,the trace metal source and their effects on the particulate matter mass were discussed.