Pino V, Ayala J H, Afonso A M, González V
Department of Analytical Chemistry, University of La Laguna, Spain.
Fresenius J Anal Chem. 2001 Oct;371(4):526-31. doi: 10.1007/s002160101009.
Cloud-point methodology has been used to develop a new procedure for preconcentration of polycyclic aromatic hydrocarbons previously extracted from marine sediment with a micellar polyoxyethylene-10-lauryl ether medium by microwave- or ultrasound-assisted extraction. The optimum conditions for preconcentration and determination of PAH by HPLC with UV detection were established. The optimized procedure was applied to determination of these analytes in fortified marine sediment. The mean recoveries obtained after extraction and preconcentration by use of microwave- or ultrasound-assisted extraction were 105.8 and 99.5%, respectively. Precision, however, is considerably higher when extraction is performed ultrasonically.
浊点法已被用于开发一种新的程序，用于对先前通过微波或超声辅助萃取从海洋沉积物中用胶束聚氧乙烯-10-月桂基醚介质萃取的多环芳烃进行预富集。建立了用高效液相色谱-紫外检测法预富集和测定多环芳烃的最佳条件。将优化后的程序应用于加标海洋沉积物中这些分析物的测定。使用微波或超声辅助萃取进行萃取和预富集后获得的平均回收率分别为105.8%和99.5%。然而，当采用超声萃取时，精密度要高得多。
