Efficiency and mechanism of macroporous poly(vinylthiopropionamide) chelating resin for adsorbing and separating noble metal ions and determination by atomic spectrometry

摘要: Abstract A macroporous poly(vinylthiopropionamide) chelating resin was synthesized from spherical poly(vinyl chloride) particles and used for the enrichment separation of trace noble metal ions. Trace Au(III), Pt(IV) Pd(II) in sample solutions can be enriched quantitatively range 5 M HClpH 9 with recoveries > 96%, recovery Ir(IV) at pH 1–9 93%; however, adsorption Rh(III) Ru(III) 3–6 −1 , Au, Pt, Pd eluted 6% thiourea-1 HCl Ir 6 were 96%. The capacity 978 ng g 288 mg 455 10 Ir. When reused ten times, above ions on still 92% a 100-fold excess other caused little interference determination determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). lowest concentrations 0.040 μg ml Pt followed Zeeman-effect absorption or ICP-AES good agreement certified values. structures resin, investigated Fourier transform IR electron spectroscopy revealed that chelated mainly thioketo form thiorpropionamide group forming quadridentate chelate.