高等学校化学研究 ›› 2013, Vol. 29 ›› Issue (1): 30-36.doi: 10.1007/s40242-013-2048-4
MOKHTARI Bahram, POURABDOLLAH Kobra
MOKHTARI Bahram, POURABDOLLAH Kobra
摘要:
Extraction of dioxins from blood samples was carried out by inclusion-facilitated emulsion liquid membrane process. The novelty of this work is the application of nano-baskets of calixarene and emulsion liquid membranes in the selective and efficient preconcentration of dioxin. For this aim, four derivatives of p-tert-calix[4]arene bearing different sulfonamide moieties were synthesized and their inclusion-extraction parameters were optimized including the calixarene's scaffold and concentration(as the carrier/demulsifier), the diluent type in membrane, the phase and the treat ratio, mixing speed, and initial solute concentration. Determinations were followed by a gas chromatograph and the results reveal that under the optimized operating conditions, the preconcentration of dioxins was improved and the method achieved lower limit of detections(LODs). Under optimal conditions, the figures of merits were determined to be LOD 1.0 pg/L, dynamic range 0.6―112.0 pg/L, RSD 5.5%(n=5), and the maximum enrichment factor and recovery were determined to be 3.3 and 99%, respectively.