Separation and preconcentration of Ag(I) in aqueous samples by flotation as an ion-associate using iodide and ferroin followed the determination by flame atomic absorption spectrometry.

摘要: A simple method for separation/preconcentration and determination of Ag(I) in aqueous samples is described. The based on formation an ion-associate between Ag(I)-iodide complex ferroin, which can be floated at the interface aqueous/n-heptane phases. flotation process was carried out using 500-ml aliquot solution layer dissolved 5 ml 1 M HNO3 containing methanol (50% v/v) as solvent. content then determined by flame atomic absorption spectrometry (FAAS). so could considered enrichment process, achieved to a quantitative feature, when pH adjusted 4 concentrations iodide ferroin were about 3.2 x 10(-4) 6.25 10(-5) M, respectively. LOD RSD (n = 7) obtained 1.0 10(-8) 2.4%, It found that large number cations anions even high considerably foreign ion/Ag(I) ratios not interfered. applied satisfactorily recovery from different samples.