| 18966502 |
Chang X, Li Y, Zhan G, Luo X, Gao W: Synthesis of poly (N-aminoethyl) acrylamide chelating fiber and properties of concentration and separation of noble metal ions from samples. Talanta. 1996 Mar;43(3):407-13.
A new kind of poly (N-aminoethyl) acrylamide chelating fiber was synthesized from nitrilon (an acrylonitrile-based synthetic fiber) and used for the concentration and separation of traces of noble metal ions from solution. The results showed that 16-80 ng ml (1) of Au (III), Pt (IV), Pd (IV), Ir (IV), Ru (III) and Rh (III) can be quantitatively concentrated by the fiber up to a flow rate of 20 ml min (-1) at pH 3, and can be desorbed quantitatively with an eluting agent from the fiber column with recoveries of 96-100%. For a fiber reused 10 times, the recoveries of these ions were still over 94%, and a 100-1000 times excess of Fe (III), Al (III), Ca (II), Mg (II), Ni (II), Co (II), Cu (II) and Zn (II) caused no interference in the determination of these ions by inductively-coupled plasma atomic emission spectrometry. The capacities of the fiber for the analytes were in the range 0.80-2.62 mol g (-1), The relative standard deviation of the method was between 0.02% and 2.6%. Recoveries of a standard added to a real sample were 96.8-99.2%. The average error for the analysis by this method for a powder sample was 3.5%. The IR spectra of the analyte-bearing fiber showed that these ions coordinated to nitrogen sites in the fiber. |
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