Highly sensitive and stable measurement of Cd in water based
on electrodeposition enrichment-LIBS technology

doi:10.3969/j.issn.1673-6141.2024.03.004

Abstract

Abstract: Aiming at the highly sensitive and stable detection of trace amounts of Cd2+ in water, an
experimental study based on Al sheet electrodeposition enrichment (ED) combined with laser-induced
breakdown spectroscopy (LIBS) to detect Cd in water analysis method (ED-LIBS) is carried out. The
effects of enrichment time, enrichment voltage, concentration of conductive solute KCl, and sandpaper
polishing on the electrode surface, on Cd element enrichment are analyzed. The result shows that the
enrichment stability of Cd element is improved after the Al flakes for electrical-deposition being polished by sandpaper. The optimized enrichment voltage, enrichment time and concentration of KCl are −2.4 V,
1200 s and 2 g/L, respectively. By using the proposed method, the detection limit and relative standard
deviation of Cd element are 0.0021 mg/L and 3.30%, respectively, which meets the detection requirement
of "Sanitary Standards for Drinking Water" and provides an optional method for the highly sensitive and
stable analysis of trace Cd elements in water.

Key words: electrical-deposition enrichment, laser-induced breakdown spectroscopy, heavy metals in water, highly sensitive and stable measurement

CLC Number:

O433.4

SHU Yang , FANG Li , MA Mingjun , MENG Deshuo , ZHAO Nanjing , . Highly sensitive and stable measurement of Cd in water based on electrodeposition enrichment-LIBS technology[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(3): 314-321.

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Highly sensitive and stable measurement of Cd in water based on electrodeposition enrichment-LIBS technology

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