Ferrofluid-Based Preconcentration And Ultra-Trace Determination Of Pt, Pd, Au, And Ag In Complex Matrices Using Inductively Coupled Plasma Mass Spectrometry

IF 3.4 2区 化学 Q1 SPECTROSCOPY
D. Beauchemin
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引用次数: 0

Abstract

: This study presents a method for the ultra-trace determination of several noble metals (Pd, Pt, Au, and Ag) in geological samples through selective preconcentration using a ferrofluid. Specifically, Fe 3 O 4 magnetic nanoparticles (MNPs) coated with silica and titania and functionalized with 3-mercaptopropyltrimethoxysilane and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane were employed for the selective sorption of analytes. After injecting the ferrofluid into an aqueous sample, the functionalized MNPs adsorbed the target analytes within 5 min. The analyte-carrying MNPs were then separated using an external magnet, followed by elution using 10% v/v aqua regia + 3% thiourea. The eluate was analyzed using inductively coupled plasma mass spectrometry. The effects of sample solution pH, eluent composition, elution time, and elution volume on the preconcentration factor were investigated. Under optimized conditions, the detection limits were improved by factors of 8 to 15 for Pt, Pd, Au, and Ag, compared to those obtained without preconcentration. The accuracy of this method was verified by analyzing a certified reference material (CDN-PGMS-29) of ore containing noble metals, and the measured concentrations were consistent with the certified values based on a Student’s t-test at the 95% confidence level.
基于铁磁流体的预富集和使用电感耦合等离子体质谱法在复杂基质中超痕量测定Pt, Pd, Au和Ag
:本研究提出了一种使用铁磁流体通过选择性预富集超痕量测定地质样品中几种贵金属(Pd、Pt、Au和Ag)的方法。具体而言,用二氧化硅和二氧化钛涂覆并用3-巯基丙基三甲氧基硅烷和N-(2-氨基乙基)-3-氨基丙基三甲氧基硅烷官能化的Fe3O4磁性纳米颗粒(MNPs)用于分析物的选择性吸附。将铁磁流体注入水性样品后,功能化的MNP在5分钟内吸附目标分析物。然后使用外部磁体分离携带分析物的MNP,然后使用10%v/v王水+3%硫脲洗脱。使用电感耦合等离子体质谱法对洗脱液进行分析。考察了样品溶液pH、洗脱液组成、洗脱时间和洗脱体积对预富集因子的影响。在优化的条件下,与未预富集的情况相比,Pt、Pd、Au和Ag的检测限提高了8-15倍。通过分析含贵金属矿石的认证参考物质(CDN-PGMS-29)验证了该方法的准确性,并且在95%置信水平下,测量的浓度与基于Student t检验的认证值一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Atomic Spectroscopy
Atomic Spectroscopy 物理-光谱学
CiteScore
5.30
自引率
14.70%
发文量
42
审稿时长
4.5 months
期刊介绍: The ATOMIC SPECTROSCOPY is a peer-reviewed international journal started in 1962 by Dr. Walter Slavin and now is published by Atomic Spectroscopy Press Limited (ASPL). It is intended for the rapid publication of both original articles and review articles in the fields of AAS, AFS, ICP-OES, ICP-MS, GD-MS, TIMS, SIMS, AMS, LIBS, XRF and related techniques. Manuscripts dealing with (i) instrumentation & fundamentals, (ii) methodology development & applications, and (iii) standard reference materials (SRMs) development can be submitted for publication.
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