Selective solid-phase extraction of nickel(II) using a surface-imprinted silica gel sorbent

摘要: A new Ni(II)-imprinted amino-functionalized silica gel sorbent with excellent selectivity for nickel(II) was prepared by an easy one-step reaction combining a surface imprinting technique selective solid-phase extraction (SPE) of trace Ni(II) in water samples prior to its determination inductively coupled plasma atomic emission spectrometry (ICP-AES). Compared non-imprinted polymer particles, the ion-imprinted polymers (IIPs) had higher and adsorption capacity Ni(II). The maximum static 12.61 4.25 mg g(-1), respectively. relatively factor (alpha(r)) values Ni(II)/Cu(II), Ni(II)/Co(II), Ni(II)/Zn(II) Ni(II)/Pd(II) were 45.99, 32.83, 43.79 28.36, which greater than 1. distribution ratio (D) greatly larger that Cu(II), Co(II), Zn(II) Pd(II). detection limit (3 sigma) 0.16 ng mL(-1). relative standard deviation method 1.48% eight replicate determinations. validated analyzing two certified reference materials (GBW 08618 GBW 08402), results obtained is good agreement values. developed also successfully applied nickel plants satisfactory results. (c) 2006 Elsevier B.V. All rights reserved.