Comparison of two capillary electrophoresis online stacking modes by analysis of polycyclic aromatic hydrocarbons in airborne particulates
✍ Scribed by Guan-Qun Song; Zhen-Lei Peng; Jin-Ming Lin
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 798 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1615-9306
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✦ Synopsis
Abstract
Naphthalene, fluorene, pyrene, anthracene, phenanthrene, and chrysene were successfully separated by CD‐modified MEKC (CD‐MEKC) using 20 mM borate (pH 9.0) containing 90 mM SDS and 75 mM β‐CD. Two online stacking methods, i. e., sweeping and field‐enhanced sample injection (FESI), were explored to enhance the detection sensitivity. The influences of some crucial parameters in sweeping and FESI procedures were investigated. For FESI method, a plug of water and low‐conductivity sample matrix was used to increase the stacking efficiency. Compared with the sweeping method, FESI can increase the sensitivity in the range of 10–20‐fold. The proposed method was used for the analysis of polycyclic aromatic hydrocarbons in airborne particulates.