Super Sensitive Detection of Lead in Water by Laser-Induced Breakdown Spectroscopy Combined with Laser-Induced Fluorescence Technique

Yuxiang, 杨宇翔 Yang; Juan, 康娟 Kang; Yarui, 王亚蕊 Wang; Yuqi, 陈钰琦 Chen; Runhua, 李润华 Li

doi:10.3788/aos201737.1130001

Cited by 2 publications

(1 citation statement)

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“…Given weak plasma and unstable spectral intensities associated with the direct laser excitation of the liquid surface of water samples [8], water samples are usually converted to solid samples before using LIBS. The existing liquid-to-solid conversion methods include chemosetting [9], adsorption by wateradsorbing materials [10,11], and dry enrichment using solid substrates [12]. Given that graphite can be easily processed mechanically, has stable physicochemical characteristics and is spectroscopically pure [13], the liquid samples in this study were pretreated using a graphite-substrate dry enrichment method.…”

Section: Introductionmentioning

confidence: 99%

Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

Jia¹,

Zhao²,

Li³

2018

Plasma Sci. Technol.

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In order to reduce the fluctuation of LIBS detection spectrum of liquid sample, the full-spectrum sum method and the internal standardization method is adopted, using an equal-RSD normalization algorithm to calibrate the detection spectrum. Experiment result shows that the full-spectrum sum method reduced the RSD of parallel samples of Cd and Cr to 9.4% and 11.06% from 28.32% and 31.93% respectively, yielded better overall calibration than the singleelement internal standardization approach, thereby suggesting that the former method is convenient and effective for online calibration of LIBS for detection of aqueous heavy metals.

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Section: Introductionmentioning

confidence: 99%

Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

Jia¹,

Zhao²,

Li³

2018

Plasma Sci. Technol.

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Simultaneous detection of heavy metals in solutions by electrodeposition assisted laser induced breakdown spectroscopy

Zhao

et al. 2022

Journal of Laser Applications

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Detection of heavy metals in solutions has been performed using laser-induced breakdown spectroscopy (LIBS) combined with electrodeposition (ED). A polished aluminum (Al) sheet serves as the cathode in the three-electrode system. Four heavy metal ions were concentrated at the same time, namely, copper (Cu2+), cadmium (Cd2+), chromium (Cr3+), and nickel (Ni2+). The results of experiments demonstrated that it was more conducive to the enrichment of heavy metal elements when the pH of the solution was in the range of 6–8.5. The smoother the aluminum electrode was polished with the metallographic sandpaper, the better the uniformity of enrichment and the repeatability of the experiment. After optimizing the experimental conditions, the relative standard deviation (RSD) values of a laser single-shot of four polished aluminum electrodes were all below 20%. When the aluminum electrode was polished with 5000-mesh metallographic sandpaper, the RSD value between parallel samples was only 0.03%. The limits of detection of the elements are 4.86 μg/l for Cd2+, 2.17 μg/l for Cr3+, 2.44 μg/l for Cu2+, and 10.49 μg/l for Ni2+ after being concentrated in a mixed solution for 15 min, respectively. The results indicated that the LIBS technique coupled with ED could be a reliable and accurate method for the detection of heavy metals in solution.

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Super Sensitive Detection of Lead in Water by Laser-Induced Breakdown Spectroscopy Combined with Laser-Induced Fluorescence Technique

Cited by 2 publications

References 0 publications

Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

Simultaneous detection of heavy metals in solutions by electrodeposition assisted laser induced breakdown spectroscopy

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