Multi-dimensional signals coupling of simultaneous acquisition stripping current with laser-induced breakdown spectroscopy for accurate analysis of Cd(II) in coexisting Cu(II)

Yuan-Fan Yang; Zong-Yin Song; Zi-Hao Liu; Zhi-Wei Gao; Xin Cai; Cong-Cong Huang; Pang-Da Dai; Meng Yang; Pei-Hua Li; Shi-Hua Chen; Xing-Jiu Huang

doi:10.1016/j.aca.2024.343121

Multi-dimensional signals coupling of simultaneous acquisition stripping current with laser-induced breakdown spectroscopy for accurate analysis of Cd(II) in coexisting Cu(II)

Anal Chim Acta. 2024 Oct 9:1325:343121. doi: 10.1016/j.aca.2024.343121. Epub 2024 Aug 17.

Authors

Yuan-Fan Yang¹, Zong-Yin Song², Zi-Hao Liu³, Zhi-Wei Gao³, Xin Cai³, Cong-Cong Huang³, Pang-Da Dai⁴, Meng Yang⁵, Pei-Hua Li⁶, Shi-Hua Chen⁷, Xing-Jiu Huang⁸

Affiliations

¹ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Environmental Hefei Comprehensive National Science Center, Hefei, 230088, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem, And Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.
² Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.
³ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
⁴ Wan Jiang New Industry Technology Development Center, Tongling, 244000, China.
⁵ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Institute of Environmental Hefei Comprehensive National Science Center, Hefei, 230088, China; Wan Jiang New Industry Technology Development Center, Tongling, 244000, China. Electronic address: [email protected].
⁶ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China. Electronic address: [email protected].
⁷ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem, And Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China. Electronic address: [email protected].
⁸ Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China; Institute of Environmental Hefei Comprehensive National Science Center, Hefei, 230088, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem, And Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China. Electronic address: [email protected].

PMID: 39244307
DOI: 10.1016/j.aca.2024.343121

Abstract

Background: Despite significant advancements in detecting Cd(II) using nanomaterials-modified sensitive interfaces, most detection methods rely solely on a single electrochemical stripping current to indicate concentration. This approach often overlooks potential inaccuracies caused by interference from coexisting ions. Therefore, establishing multi-dimensional signals that accurately reflect Cd(II) concentration in solution is crucial.

Results: In this study, we developed a system integrating concentration, electrochemical stripping current, and laser-induced breakdown spectroscopy (LIBS) characteristic peak intensity through in-situ laser-induced breakdown spectroscopy and electrochemical integrated devices. By simultaneously acquiring multi-dimensional signals to dynamically track the electrochemical deposition and stripping processes, we observed that replacement reactions occur between Cu(II) and Cd(II) on the surface of Ru-doped MoS₂ modified carbon paper electrodes (Ru-MoS₂/CP). These reactions facilitate the oxidation of Cd(0) to Cd(II) during the stripping process, significantly increasing the currents of Cd(II). Remarkably, the ingenious design of the Ru-MoS₂ sensitive interface allowed for the undisturbed deposition of Cu(II) and Cd(II) during the electrochemical deposition process. Consequently, our in-situ integrated device achieved accurate detection of Cd(II) in complex environments, boasting a detection sensitivity of 8606.5 counts μM⁻¹.

Significance: By coupling multi-dimensional signals from stripping current and LIBS spectra, we revealed the interference process between Cu(II) and Cd(II), providing valuable insights for accurate electrochemical analysis of heavy metal ions in complex water environments.

Keywords: Accurate analysis; Cd(II); Dynamically track; Interference; Multi-dimensional signals.