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首页> 外文期刊>Журнал аналитической химии >SIMULTANEOUS EXTRACTION OF TRACE AMOUNTS OF COBALT, NICKEL AND COPPER IONS USING MAGNETIC IRON OXIDE NANOPARTICLESWITHOUT CHELATING AGENT
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SIMULTANEOUS EXTRACTION OF TRACE AMOUNTS OF COBALT, NICKEL AND COPPER IONS USING MAGNETIC IRON OXIDE NANOPARTICLESWITHOUT CHELATING AGENT

机译：无需螯合剂即可使用磁性氧化铁纳米粒子同时萃取痕量的钴，镍和铜离子

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摘要

The present study investigates the application of Fe_3O_4 nanoparticles as an adsorbent for solid phase extraction and subsequent determination of trace amounts of cobalt, nickel and copper in environmental water samples using flame atomic absorptionspectroscopy. The analyte ions were adsorbed on Magnetic nanoparticles in the pH range of 10—12 and then, Fe_3O_4 nanoparticles were easily separated from the aqueous solution by applying an external magnetic field and decantation. Hence, no filtrationorcentrifugation was needed. After extraction and collection of magnetic nanoparticles, the analyte ions were desorbed using 1.0 M HNO_3. Several factors that may affect the preconcentration and extraction process, including pH, type and volume of eluent, sample volume, salt effect and matrix effect were optimized. Under the optimized conditions, linearity was maintained from 0.005 to 3.0 mu -g/mL for cobalt and nickel and from 0.001 to 1.25 mu g/mL for copper in the initial solution. The detection limits of this method for cobalt, nickel and copper ions were 0.9, 0.7 and 0.3 ng/mL, respectively. Finally, the method was successfully applied to the extraction and determination of the analyte ions in natural waters and reference plant samples.
机译：本研究调查了Fe_3O_4纳米颗粒作为吸附剂用于固相萃取以及随后使用火焰原子吸收光谱法测定环境水样品中痕量钴，镍和铜的应用。在10-12的pH范围内，将分析物离子吸附在磁性纳米颗粒上，然后通过施加外部磁场和倾析，很容易将Fe_3O_4纳米颗粒与水溶液分离。因此，不需要过滤或离心。提取和收集磁性纳米颗粒后，使用1.0 M HNO_3解吸分析物离子。优化了可能影响预浓缩和萃取过程的几个因素，包括pH，洗脱液的类型和体积，样品体积，盐效应和基质效应。在最佳条件下，初始溶液中钴和镍的线性保持在0.005至3.0μg / mL，铜保持在0.001至1.25μg / mL。该方法对钴，镍和铜离子的检出限分别为0.9、0.7和0.3 ng / mL。最终，该方法成功应用于天然水和参考植物样品中分析物离子的提取和测定。

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