Cloud point extraction and spectrophotometric determination of mercury species at trace levels in environmental samples


ULUSOY H. İ. , GÜRKAN R. , ULUSOY S.

TALANTA, cilt.88, ss.516-523, 2012 (SCI İndekslerine Giren Dergi) identifier identifier identifier

Özet

A new micelle-mediated separation and preconcentration method was developed for ultra-trace quantities of mercury ions prior to spectrophotometric determination. The method is based on cloud point extraction (CPE) of Hg(II) ions with polyethylene glycol tert-octylphenyl ether (Triton X-114) in the presence of chelating agents such as 1-(2-pyridylazo)-2-naphthol (PAN) and 4-(2-thiazolylazo) resorcinol (TAR). Hg(II) ions react with both PAN and TAR in a surfactant solution yielding a hydrophobic complex at pH 9.0 and 8.0, respectively. The phase separation was accomplished by centrifugation for 5 min at 3500 rpm.