煤烟灰中多环芳烃的气相色谱/质谱分析

Gas Chromatographic/Mass Spectrometric Analysis of Polycyclic Aromatic Hydrocarbons in Coal Soot

用索氏抽提后硅胶柱层析法将煤烟灰中的有机物预先分离为脂肪烃、芳香烃和极 性化合物三种馏分，经气相色谱／质谱分析，从水平管式煤气发生炉和蒸汽机车烟灰 中分别检测出１７种（１８３．５８μｇ／ｇ）和１２种（９５．４１μｇ／ｇ）致癌性多环芳烃化合 物，分别占芳香烃馏分的９．９％和１２．２％，与大气漂尘的分析结果相近。

By means of Soxhlet extraction, column separation and GC/MS detection, coal soal soot samples from gas generators and locomotive chimneys are are analyzed. The amount of carcinogenic PAHs are determined to be 185.58 and 95. 41 μg/g respectively. The PAHs amount to 72.9% of the total organic matterin boths amples of coal soot from gas generators and locomotive chimneys. The carcinogenic PAHs aocount for 9.9% and 12.2% of total PAHs in the former and the latter samples respectively.