MC-ICP-MS用于地质和环境样品中Cd同位素分析的单级阴离子交换分离方法†

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
Qiao-Hui Zhong, Lu Yin, Jie Li, Yue-Xing Feng, Neng-Ping Shen, Bing-Yu Peng and Zhao-Yang Wang
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引用次数: 0

摘要

AG-MP-1M阴离子交换树脂常用于从地质和环境样品中分离纯化Cd。然而,还需要使用阴离子交换、TRU-Spec或BPHA提取树脂的第二个柱来进一步从残留的Sn中纯化Cd,以进行高精度的Cd同位素比率测量。在本研究中,开发了一种新的高效单级分离方法,使用AG-MP-1M(100–200目)阴离子交换树脂从地质和环境样品中分离镉,用于高精度的镉同位素比值测量。与AG-MP-1M阴离子交换树脂的常用分离方案不同,使用2M HCl+4 M HF混合洗脱液可有效地从树脂中剥离大部分Sn(>;99%),AG-MP-1M阴离子交换树脂使用HCl洗脱液仅去除~65%的Sn。此外,通过0.04 M HCl+2 M HF和0.005 M HCl+2M HF的洗脱,潜在的残留Sn保留在树脂上,这允许在没有Sn拖尾的情况下定量收集Cd部分(~99.5%)。单级纯化程序利用了在HCl+HF混合溶液中,在不同的HCl和HF浓度下,Sn对AG-MP-1M阴离子交换树脂的不同亲和力,从而可以直接有效地从Sn和其他复杂样品基质中分离Cd。我们使用该程序和双尖峰MC-ICP-MS方法来确定锰结核、火成岩、页岩、土壤和沉积物参考材料的δ114/110CdNIST SRM 3108值,并获得了与先前研究中报告的值在分析不确定性范围内一致的结果。此外,本文还首次报道了土壤(GSS-1a)、沉积物(GSD-4a)和白云石(GSR-12)标准参考物质的δ114/110CdNIST SRM 3108值。所描述的纯化程序允许在不同类型的地质和环境样品中进行有效和快速的Cd同位素分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A single-stage anion exchange separation method for Cd isotopic analysis in geological and environmental samples by MC-ICP-MS†

A single-stage anion exchange separation method for Cd isotopic analysis in geological and environmental samples by MC-ICP-MS†
AG-MP-1M anion exchange resin is commonly used to separate and purify Cd from geological and environmental samples. However, a second column using anion exchange, TRU Spec, or BPHA extraction resins...
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来源期刊
CiteScore
6.20
自引率
26.50%
发文量
228
审稿时长
1.7 months
期刊介绍: Innovative research on the fundamental theory and application of spectrometric techniques.
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