Extraction and determination of Cu (II) in wastewaters by new combinational solid/Liquid microextraction technique; Functionalized MWCNTs in hollow fiber and flame atomic absorption spectroscopy

This paper discusses new application in hollow fiber based solid/liquid phase microextraction technique for determination of Cu(II) by atomic absorption spectrometry.The application of LPME to determination of pollutants in several matrices resulted in high enrichment factors of analytes in low concentration as well as selectivity because of the discriminatory nature of the hollow fiber preventing extraction of large molecules and / or suspended matter. This technique was used of two-phase system in which the donor aqueous phase containing copper (II) ion and phase receptor including functionalized carbon nanotubes and octanol into a polypropylene hollow fiber segment. The influences of the experimental parameters including pH of the solutions, amounts of MWNTs, and sample volume etc. on the enrichment factor of analyte ions were investigated. Under the optimized extraction conditions, the method showed good linearity, low limits of detection and very excellent enrichment factor (EF=404 for HF-MWCNTs-NaClO , EF= 446 for HF-MWCNTs-HNO3

کلیدواژه ها:

Solid/liquid phase microextraction ، Multiwalled Carbon nanotube ، Hollow fiber ، Cu (II) ، Flame atomic absorption spectroscopy