Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples.
Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples.
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DOI：
10.1186/1752-153x-5-41
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发表时间：
2011-07-15
影响因子：
--
通讯作者：
Bagheri H
中科院分区：
文献类型：
--
作者：
Shishehbore MR;Afkhami A;Bagheri H
报道了一种环境样品中痕量重金属离子的预富集方法。该方法是基于水杨酸作为螯合剂分别吸附Cu（II）、Cd（II）、Ni（II）和Cr（III）离子在二氧化硅包覆的磁铁矿纳米颗粒上。采用XRD、SEM、BET、FT-IR等测试手段对制备的吸附剂进行了表征。用4.0 mL 1.0 mol L-1硝酸洗脱所吸附配合物中的金属含量。考察了pH、固相量、洗脱液条件、基质离子对分析物保留率的影响。通过对标准物质的分析，验证了该方法的准确度和精密度。Cu（II）、Cd（II）、Ni（II）和Cr（III）离子的检出限（3Sb/m, N = 8）分别为0.22、0.11、0.27和0.15 μg L-1，最大富集系数为200。该方法成功地应用于各种水、食品和其他样品中痕量和有毒金属的评价。
A method for the preconcentration of trace heavy metal ions in environmental samples has been reported. The presented method is based on the sorption of Cu(II), Cd(II), Ni(II) and Cr(III) ions with salicylic acid as respective chelate on silica-coated magnetite nanoparticles. Prepared adsorbent was characterized by XRD, SEM, BET and FT-IR measurements. The metals content of the sorbed complexes are eluted using 4.0 mL of 1.0 mol L-1 nitric acid. The influences of the analytical parameters including pH, amount of solid phase and condition of eluting solution, the effects of matrix ions on the retention of the analytes were examined. The accuracy and precision of suggested method were tested by analyzing of certified reference materials. The detection limits (3Sb/m, N = 8) for Cu(II), Cd(II), Ni(II) and Cr(III) ions are 0.22, 0.11, 0.27 and 0.15 μg L-1, respectively, and the maximum preconcentration factor is 200. The method was successfully applied to the evaluation of these trace and toxic metals in various waters, foods and other samples.