Solid-phase extraction and preconcentration of trace Pb(II) from water samples with folic acid modified silica gel
作者： Qihui Wang , Xijun Chang , Zheng Hu , Dandan Li , Zhifeng Tu
DOI: 10.1080/03067319.2010.548600
关键词:
摘要: A chelating matrix prepared by immobilising folic acid on silica gel-bound amine phase was used as a new solid-phase extractant. This sorbent has been developed only for preconcentration of trace Pb(II) prior to determination inductively coupled plasma atomic emission spectrometry (ICP-AES). Experimental conditions were investigated batch and column procedures. The optimum pH value the separation 4.0. adsorbed quantitatively eluted 2.0 cm3 0.5 mol dm−3 HCl. Common coexisting ions did not interfere with Pb(II). maximum static adsorption capacity under found be 69.23 mg g−1 detection limit method defined International Union Pure Applied Chemistry 0.28 ng cm−3. relative standard deviation (RSD) lower than 2.0% (n = 8). validated analysing certified reference materials ...
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