臺灣博碩士論文加值系統

本研究所選用之XAD-2吸附劑, 有選擇性高﹑便宜﹑能提高萃取速度﹑脫
附溶劑使用量不多且有機物被吸附後長時間不易產生化學變化等優點; 再
配合解析能力﹑靈敏度﹑再現性都不錯的GC儀器, 來對致癌性之多苯環芳
香族化合物做分析. 水樣採取污染日益嚴重的大漢溪流域之河水.在幾種
常用的非極性萃取溶劑中發現以二氯甲烷為脫附溶劑時各物質的回收率效
果最好; 水溶液沖提流速在30 ml/min是最適合作真實水樣的沖提流速;且
採用內標準法配合管上注射法之GC所得到的滯留指數和 GC/MS作為定性和
定量分析, 最後實際分析很嚴重的大漢溪流域的水樣, 發現浮洲橋有
Naphthalene 0.26 ± 0.03ppb和Phenanthrene 0.64 ± 0.03ppb;大漢橋
有Naphthalene 2.64 ± 0.15ppb和Anthracene 3.42 ± 0.20ppb的PAHs
.

XAD-2 adsorbent has many advantages including high selectivity,
fast speed of extraction, need of less solvent and greater
atability of adsorbed materials. Gas Chromatography(GC) has
high sensitivity, reproducibility and resolution. Therefore,
the research chose XAD-2 adsorbent to extract the carcinogenic
pollutants of Polynuclear Aromatic Hydrocarbons(PAHs) from
different water samples and to indentify them by the use of GC.
Among several commonly used nonpolar solvent, dichloromethane
was found to be the best desorbing solvent. It was also found
that an eluting flow rate of 30 ml/min was the most efficient
one. Applying the internal standard method with the help of
retention index of each compound, we achieved a quantitative
and qualitative analysis of the different PAHs through the On-
column Injection in GC and GC/MS. Finally through using the
same method we were able to analze the waters of Da-Han stream.
We found that Fu-Chou bridge had Naphthalene 0.26 ± 0.03 ppb
and Phenanthrene 0.64 ± 0.03 ppb;Ta-Han bridge had Naphthalene
2.64 ± 0.15 ppb and Anthracene 3.42 ± 0.20 ppb.