Confocal controlled laser-induced breakdown spectroscopy for quantitative detection of cadmium in soil

Angze Li, Xiaojuan Chuai, Yuxin Liu, Lirong Qiu, Han Cui*, Weiqian Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Soil, one of the most precious natural resources on Earth, gradually accumulates heavy metals, inevitably causing significant damage to the ecological environment. Here, we introduce confocal controlled laser induced breakdown spectroscopy (CCLIBS) technology for the quantitative analysis of the heavy metal cadmium in soil for the first time. CCLIBS offers better spatial consistency and stable plasma temperature during sample ablation compared to traditional LIBS, thereby reducing matrix effects to improve the accuracy of the quantitative results. The fluctuation of the spectrum and limit of detection are reduced by 0.6 times and 0.39 times, respectively. An effective prediction model was established using the partial least squares method, with a determination coefficient increased to 0.96. The root mean square error of prediction and average relative error are reduced to 67.67 and 0.20, respectively. These results indicate that CCLIBS provides consistent ablation conditions for elemental quantification and yields reliable test results, which is significant for monitoring heavy metals in the ecological environment and effectively intervene and mitigate environmental contamination.

Original languageEnglish
Article number106931
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume216
DOIs
Publication statusPublished - Jun 2024

Keywords

  • Cadmium
  • Confocal controlled
  • Laser-induced breakdown spectroscopy
  • Quantitative detection

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Li, A., Chuai, X., Liu, Y., Qiu, L., Cui, H., & Zhao, W. (2024). Confocal controlled laser-induced breakdown spectroscopy for quantitative detection of cadmium in soil. Spectrochimica Acta - Part B Atomic Spectroscopy, 216, Article 106931. https://doi.org/10.1016/j.sab.2024.106931