Comparison of laser-induced breakdown spectroscopy (LIBS) and ICP analysis results for measuring Pb and Zn in soil

IF 1.2 4区农林科学 Q4 SOIL SCIENCE

Soil Research Pub Date : 2024-04-09 DOI:10.1071/sr23248

Hyeon Yang, Young-Tae Jo, Jihyo Chong, Yonggwan Won, Jeong-Hun Park

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引用次数: 0

Abstract

Context

Laser-induced breakdown spectroscopy (LIBS) is a rapid, multielement analytical technique. It is particularly suitable for the qualitative and quantitative analyses of heavy metals in solid samples.

Aims

To validate the technique, the LIBS data were compared with the data obtained via conventional inductively coupled plasma (ICP) spectroscopy for the same soil samples.

Methods

In this study, standard and unknown soil samples from contaminated areas were prepared and fixed to an adhesive tape for LIBS analysis. The soils were also digested with acids for ICP analysis. The emission intensity of one selected line for each of the two analytes, i.e. lead (Pb) and zinc (Zn), was normalised to the background signal and plotted as a function of the concentration values previously determined via ICP analysis.

Key results

The data demonstrated good linearity for the calibration lines drawn, and the correlation between the ICP and LIBS data was confirmed by the satisfactory agreement between the corresponding values.

Conclusions

The concentration coefficient of determination (R²) between LIBS and ICP-aqua regia digestion analysis or ICP-total digestion analysis were >0.86 and >0.89 for Pb and Zn, respectively. The total analysis time for the LIBS method was 310 min, which was 54.40% shorter than that for the ICP method (680 min).

Implications

Consequently, LIBS can be used to measure Pb and Zn in soils without any chemical preparation.

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比较激光诱导击穿光谱法（LIBS）和 ICP 分析法测量土壤中铅和锌的结果

背景激光诱导击穿光谱（LIBS）是一种快速的多元素分析技术。它特别适用于固体样品中重金属的定性和定量分析。目的为了验证该技术的有效性，将 LIBS 数据与通过传统的电感耦合等离子体 (ICP) 光谱法获得的相同土壤样本的数据进行了比较。方法在这项研究中，制备了来自污染区的标准和未知土壤样本，并将其固定在胶带上进行 LIBS 分析。这些土壤也用酸进行了消化，以便进行 ICP 分析。将铅 (Pb) 和锌 (Zn) 这两种分析物中每种分析物的一条选定线的发射强度与背景信号归一化，并绘制成与之前通过 ICP 分析确定的浓度值的函数关系图。主要结果数据显示所绘制的校准线具有良好的线性关系，ICP 和 LIBS 数据之间的相关性通过相应值之间令人满意的一致性得到了证实。结论铅和锌的 LIBS 与 ICP-王水消解分析或 ICP-全消解分析之间的浓度决定系数（R2）分别为 0.86 和 0.89。LIBS 方法的总分析时间为 310 分钟，比 ICP 方法（680 分钟）缩短了 54.40%。因此，LIBS 可用于测量土壤中的铅和锌，而无需任何化学制备。

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

Soil Research SOIL SCIENCE-

CiteScore

3.20

自引率

6.20%

发文量

审稿时长

4.5 months

期刊介绍： Soil Research (formerly known as Australian Journal of Soil Research) is an international journal that aims to rapidly publish high-quality, novel research about fundamental and applied aspects of soil science. As well as publishing in traditional aspects of soil biology, soil physics and soil chemistry across terrestrial ecosystems, the journal welcomes manuscripts dealing with wider interactions of soils with the environment. Soil Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.