LIBS Detection of Heavy Metal Elements in Liquid Solutions by Using Wood Pellet as Sample Matrix

WEN Guanhong(温冠宏); SUN Duixiong(孙对兄); SU Maogen(苏茂根); DONG Chenzhong(董晨钟)

doi:10.1088/1009-0630/16/6/11

Plasma Science and Technology > 2014 > 16(6): 598-601. > DOI: 10.1088/1009-0630/16/6/11

WEN Guanhong(温冠宏), SUN Duixiong(孙对兄), SU Maogen(苏茂根), DONG Chenzhong(董晨钟). LIBS Detection of Heavy Metal Elements in Liquid Solutions by Using Wood Pellet as Sample Matrix[J]. Plasma Science and Technology, 2014, 16(6): 598-601. DOI: 10.1088/1009-0630/16/6/11

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LIBS Detection of Heavy Metal Elements in Liquid Solutions by Using Wood Pellet as Sample Matrix

1 Key Laboratory of Atomic and Molecular Physics & Functional Material of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China 2 Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730070, China

Funds: supported by National Natural Science Foundation of China (Nos. 11064012, 11274254, 11364037), the JSPS-NRF-NSFC A3 Fore- sight Program in the Field of Plasma Physics (No. 11261140328) and the International Scientic and Technologic Cooperative Project of Gansu Province, China (No. 1104WCGA186)

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Received Date: January 19, 2013

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Abstract

Laser-induced breakdown spectroscopy (LIBS) has been applied to the analysis of heavy metals in liquid samples. A new approach was presented to lower the limit of detection (LOD) and minimize the sample matrix effects, in which dried wood pellets absorbed the given amounts of Cr standard solutions and then were baked because they have stronger and rapid absorption properties for liquid samples as well as simple elemental compositions. In this work, we have taken a typical heavy metal Cr element as an example, and investigated the spectral feasibility of Cr solutions and dried wood pellets before and after absorbing Cr solutions at the same experimental conditions. The results were demonstrated to successfully produce a superior analytical response for heavy metal elements by using wood pellet as sample matrix according to the obtained LOD of 0.07 ppm for Cr element in solutions.
- LIBS,
- limit of detection,
- Cr element

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