Issue 69, 2018, Issue in Progress

Detection of cadmium in soils using laser-induced breakdown spectroscopy combined with spatial confinement and resin enrichment

Abstract

The determination of heavy metals in soils is of great significance for the monitoring and control of environmental pollution. However, it is hard to realize fast and in situ measurements. Laser-induced breakdown spectroscopy (LIBS) is an effective method for element detection in soils, but its detection limit cannot meet the requirements of the control of soil pollution. In addition, it usually suffers splash problems and needs complex pretreatment processes before measurement. In this study, we developed a new method for the determination of cadmium in soils using LIBS. We improved the sensitivity of common LIBS, while avoiding splash problems and without complex pretreatment processes. The LIBS signal is enhanced in two ways. Firstly, the heavy metals were enriched by the cation exchange resins. And then, the LIBS signal levels were further enhanced by a sample container with spatial confinement. During this process, the soil only needs to be treated with water to achieve slurry status, rather than any complex pretreatments. We demonstrated that the detection limit for cadmium in soils is 0.132 mg kgāˆ’1 using this method.

Graphical abstract: Detection of cadmium in soils using laser-induced breakdown spectroscopy combined with spatial confinement and resin enrichment

Article information

Article type
Paper
Submitted
19 Sep 2018
Accepted
21 Nov 2018
First published
27 Nov 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 39635-39640

Detection of cadmium in soils using laser-induced breakdown spectroscopy combined with spatial confinement and resin enrichment

X. Fu, G. Li, H. Tian and D. Dong, RSC Adv., 2018, 8, 39635 DOI: 10.1039/C8RA07799A

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