Automated Solid Phase Extraction of Cd(II), Co(II), Cu(II) and Pb(II) Coupled with Flame Atomic Absorption Spectrometry Utilizing a New Sol-Gel Functionalized Silica Sorbent
Automated Solid Phase Extraction of Cd(II), Co(II), Cu(II) and Pb(II) Coupled with Flame Atomic Absorption Spectrometry Utilizing a New Sol-Gel Functionalized Silica Sorbent
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DOI：
10.3390/separations8070100
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发表时间：
2021-07-01
期刊：
影响因子：
2.6
通讯作者：
Anthemidis, Aristidis
中科院分区：
文献类型：
--
作者：
Manousi, Natalia;Kabir, Abuzar;Anthemidis, Aristidis
本研究建立了一种简单、灵敏的在线吸附剂萃取-火焰原子吸收光谱法测定痕量金属的平台。该系统首次采用了一种新型的溶胶-凝胶硫氰丙基功能化硅胶作为吸附剂用于金属的分离富集。对影响在线系统性能的主要因素进行了研究和优化。评价了环境和生物样品中天然存在的潜在干扰物质以及某些有毒元素的影响。在最佳条件下的增强因子范围为73和152之间的目标分析物。建议的方法的检出限为0.15 μ g L-1的镉（II），0.5 μ g L-1的钴（II），0.5 μ g L-1的铜（II）和1.9 μ g L-1的铅（II）为120秒的预富集时间。各元素的相对标准偏差均小于3.8%，方法精密度良好。此外，溶胶-凝胶硫氰丙基官能化的硅胶填充微柱表现出有限的流动阻力和良好的填充重现性。最后，该方法被用于环境和生物样品的分析。
In this study a simple and sensitive on-line sorbent extraction platform coupled with flame atomic absorption spectrometry for trace metals determination was developed. The system utilized for the first time a novel sol-gel thiocyanatopropyl functionalized silica as adsorbent for metal's separation and preconcentration. The main factors affecting the performance of the on-line system were investigated and optimized. The effect of potential interfering species that occur naturally in environmental and biological samples, as well as some toxic elements, was evaluated. Under optimum conditions the enhancement factors ranged between 73 and 152 for the target analytes. The LODs of the proposed methods were 0.15 mu g L-1 for Cd(II), 0.5 mu g L-1 for Co(II), 0.5 mu g L-1 for Cu(II) and 1.9 mu g L-1 for Pb(II) for 120 s preconcentration time. The relative standard deviation values for all elements were less than 3.8%, indicating good method precision. Moreover, the sol-gel thiocyanatopropyl functionalized silica-packed microcolumns exhibited limited flow resistance and excellent packing reproducibility. Finally, the proposed method was utilized for the analysis of environmental and biological samples.