结合磁性离子液体和磁性颗粒,利用电热原子吸收光谱法测定铅(II)和锡(IV)

IF 3.2 2区 化学 Q1 SPECTROSCOPY
María José Muñoz-Sandoval, Yesica Vicente-Martínez, Manuel Hernández-Córdoba, Ignacio López-García
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引用次数: 0

摘要

介绍了一种用二硫代磷酸二乙酯进行络合,并通过使用由铁氧体颗粒支撑的磁性离子液体(MIL)的微萃取阶段进行预浓缩后,采用电热原子吸收光谱法(ETAAS)测定痕量铅和锡的方法。络合后,分析物被萃取到铁氧体支撑的 MIL 中,固体颗粒作为载体促进了磁铁的分离。分析物通过乙腈处理释放出来,产生的液相取样用于 ETAAS 测量。研究了最佳实验条件,如 pH 值、适当的络合剂、程序中使用的所有试剂的体积和剂量,以实现两种物质的完全分离。结果表明,铅和锡的富集因子分别为 195 和 165,检测限分别为 25 和 72 纳克/升。通过分析六种经认证的参考材料,并将其应用于不同来源的水样,检验了该程序的可靠性,此外,还通过标准添加物对结果进行了确认(所有情况下的回收率均为 97 ± 7%)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Combination of a magnetic ionic liquid and magnetic particles for the determination of Pb(II) and Sn(IV) using electrothermal atomic absorption spectrometry

Combination of a magnetic ionic liquid and magnetic particles for the determination of Pb(II) and Sn(IV) using electrothermal atomic absorption spectrometry

A procedure for the determination of traces of lead and tin by electrothermal atomic absorption spectrometry (ETAAS) after complexation with diethyl dithiophosphate and preconcentration by using a microextraction stage with a magnetic ionic liquid (MIL) supported by ferrite particles is presented. After complexation, the analytes are extracted into the ferrite-supported MIL, the solid particles acting as a carrier to facilitate the separation with a magnet. The analytes are released by treating with acetonitrile and the resulting liquid phase is sampled for the ETAAS measurement. The optimal experimental conditions such as pH, appropriate complexing agent, volumes and doses of all reagents used in the procedure are studied to achieve complete separation of both species. Enrichment factors of 195 and 165 and detection limits of 25 and 72 ng L−1 are obtained for Pb and Sn, respectively. The reliability of the procedure is checked by analyzing six certified reference materials and applied to water samples of different origin, the results being in addition confirmed by standard additions (recoveries 97 ± 7% in all cases).

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来源期刊
CiteScore
6.10
自引率
12.10%
发文量
173
审稿时长
81 days
期刊介绍: Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.
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