便携式 X 射线荧光光谱仪精确测量 Mehlich III 土壤萃取水溶液中的金属浓度

IF 2.4 3区 农林科学 Q2 SOIL SCIENCE
Emma J. A. Hart, Matthew G. Siebecker
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引用次数: 0

摘要

准确测量土壤和水中的金属浓度对作物的健康生产和环境调查决策至关重要。虽然有许多基于实验室的土壤分析方法,如电感耦合等离子体-光学发射光谱法(ICP-OES)、火焰发射光谱法和原子吸收光谱法,但大多数方法都需要大量的时间和资源。此外,目前还缺乏对水性土壤提取物中的元素进行快速分析的信息。本研究的目标是在对 Mehlich III 土壤提取物进行的便携式 X 射线荧光 (pXRF) 测量与通过 ICP-OES 进行的传统元素测量之间建立元素相关性。我们假设 pXRF 可以准确测量水性土壤提取溶液中的某些金属,其程度与 ICP-OES 的测量结果相同。为了验证这一假设,我们通过 ICP-OES 和 pXRF 对已知元素浓度的 Mehlich III 和 2% 硝酸溶液进行了分析。将使用 Mehlich III 提取的土壤样本与 ICP-OES 和 pXRF 进行比较,以验证相关性。在 Mehlich III 和 2% 硝酸溶液(浓度介于 5 至 85 mg L-1 之间)中,As、Ca、Cd、Cr、Cu、Fe、Mn、Mo、Ni、Pb、Se、V 和 Zn 的相关性很高。当浓度为 100 毫克/升时,P、S 和 Si 的相关性不高。这些结果表明,在 5 至 85 毫克/升之间,pXRF 分析水溶液和土壤提取物是一种可靠的技术;但是,在低浓度下(即金属浓度为 5 毫克/升,钾和硒浓度为 100 毫克/升),pXRF 就不太适用了。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Portable X‐ray fluorescence spectrometry accurately measures metal concentrations in aqueous Mehlich III soil extraction solutions
Accurate measurement of metal concentrations in soil and water is vital for healthy crop production and decision making for environmental surveys. While there are a multitude of laboratory‐based soil analysis methods, such as inductively coupled plasma‐optical emission spectroscopy (ICP‐OES), flame emission spectrometry, and atomic absorption spectroscopy, most are time and resource intensive. Additionally, there is a lack of information for rapid analysis of elements for aqueous soil extractions. The goal of this research is to establish elemental correlations between portable X‐ray fluorescence (pXRF) measurements of Mehlich III soil extractions and traditional elemental measurements via ICP‐OES. We hypothesize that certain metals can be accurately measured in aqueous soil extraction solutions by pXRF to the same degree as they are measured by ICP‐OES. To test this hypothesis, Mehlich III and 2% nitric acid solutions with known elemental concentrations were analyzed via ICP‐OES and pXRF. Soil samples extracted using Mehlich III were compared between ICP‐OES and pXRF to verify correlations. High correlations were found for As, Ca, Cd, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se, V, and Zn in both the Mehlich III and 2% nitric acid solutions at concentrations between 5 and 85 mg L−1. P, S, and Si did not show high correlations at concentrations <100 mg L−1. These results indicate that between 5 and 85 mg L−1, pXRF analysis of aqueous solutions and soil extractions is a reliable technique; however, at low concentrations (i.e., <5 mg L−1 for metals and <100 mg L−1 for P and S), pXRF is not well suited.
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来源期刊
Soil Science Society of America Journal
Soil Science Society of America Journal 农林科学-土壤科学
CiteScore
5.40
自引率
3.40%
发文量
130
审稿时长
3.6 months
期刊介绍: SSSA Journal publishes content on soil physics; hydrology; soil chemistry; soil biology; soil biochemistry; soil fertility; plant nutrition; pedology; soil and water conservation and management; forest, range, and wildland soils; soil and plant analysis; soil mineralogy, wetland soils. The audience is researchers, students, soil scientists, hydrologists, pedologist, geologists, agronomists, arborists, ecologists, engineers, certified practitioners, soil microbiologists, and environmentalists. The journal publishes original research, issue papers, reviews, notes, comments and letters to the editor, and book reviews. Invitational papers may be published in the journal if accepted by the editorial board.
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