Department of Chemistry, State University of Londrina, Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, PR, 86050-482, Brazil.
Federal Institute of Parana (IFPR), Campus Irati, Irati, PR, 84507-302, Brazil.
Bull Environ Contam Toxicol. 2024 Sep 21;113(4):42. doi: 10.1007/s00128-024-03955-1.
In the present paper, the assessment of vortex-assisted dispersive magnetic solid-phase extraction using amino-functionalized mesoporous combined with direct magnetic sorbent sampling (DMSS) in flame or furnace atomic absorption spectrometry (FAAS or FF-AAS) was demonstrated for highly sensitive silver determination in water samples. The developed method showed significant enrichment factors compared to conventional pneumatic nebulization by FAAS, 607 for DMSS-FF-AAS and 114 for DMSS-FAAS. The analytical curve showed linearity in the range from 5.0 to 70.0 µg L and 1.0 to 15.0 µg L and limits of detection of 0.59 and 0.09 µg L for DMSS-FAAS and DMSS-FF-AAS, respectively. The intra and inter-day precision evaluated as a percentage of the relative standard deviation (RSD,%) ranged from 1.89 to 4.71% for levels of 25.0 and 65.0 µg L. The method was applied in different kinds of water samples without matrix effects, yielding recovery values from 90 to 110%.
在本论文中，评估了涡旋辅助分散磁性固相萃取，使用氨基功能化介孔结合直接磁固相采样（DMSS），在火焰或熔炉原子吸收光谱法（FAAS 或 FF-AAS）中，用于水样中高灵敏度的银测定。与 FAAS 常规气动雾化相比，该方法显示出显著的富集因子，DMSS-FF-AAS 为 607，DMSS-FAAS 为 114。分析曲线在 5.0 至 70.0 µg L 和 1.0 至 15.0 µg L 的范围内呈现线性，DMSS-FAAS 和 DMSS-FF-AAS 的检测限分别为 0.59 和 0.09 µg L。日内和日间精密度以相对标准偏差（RSD，%）的百分比表示，在 25.0 和 65.0 µg L 的水平下，范围为 1.89%至 4.71%。该方法应用于不同种类的水样，无基质效应，回收率为 90%至 110%。
