Simultaneous separation and microdetermination of cobalt(II), nickel(II) and copper(II)

摘要: A sensitive and selective flotation procedure for the separation of microamounts Co(II), Ni(II) Cu(II) separately or in admixture is described. The maximum rate (∼ 1) 0.1 mmol/L each analyte achieved using 1 both oleic acid (HOL) surfactant 4-phenylthiosemicarbazide (HPTS) as a collector pH range 6–7. method simultaneous microdetermination analytes elaborated, based on adding excess HPTS floating species with HOL at ∼6. filtrate (which clear brownish-yellow) obtained from scum used spectrophotometric determination Co(II) 350 nm. formation constants 1:1 1:2 [Co(II):HPTS] are 6.9 × 105 1.22 1010 L mol−1, respectively. Beer’s law obeyed up to 9 μg/mL molar absorptivity 1.15 104 mol−1 cm−1. precipitate layer quantitatively collected, dissolved aqua regia aspirated directly into flame (AAS) Ni Cu. successfully applied some natural water samples. mechanism proposed.