Dispersive ionic liquid microextraction of aluminium from environmental water samples by effervescent generation of carbon dioxide

摘要

A green effervescent in situ generation of CO2-tablet-induced dispersive ionic liquid microextraction (DILIVIE) method has been first time used for the preconcentration and determination of trace levels of aluminium [AI(III)] in real water samples by graphite furnace atomic absorption spectrometry (GFAAS). In the present approach, 1-methyl-3-octylirnidazoliuni hexafluorophosphate [OMIM][PF6] was dispersed in an aqueous medium by the effer-vescent reaction of CO2-tablet to increase phase transfer ratio, which significantly improve the extraction recovery of AI(III) complex with 1-(2-pyriclylazo)-2-naphthol, into extraction solvent. Limit of detection and enrichment factor were found to be 0.045 mu g L-1 and 42.4, respectively. Validation of the developed method was carried out to determined AI(III) in a certified reference material (SLRS-4 riverine water) and the results were found to be in good agreement with the certified value. The relative standard deviation was found to be 4.3%. The developed method was applied to different water samples