Enrichment of Trace Lead in Water with Graphite and Measurement by Laser-Induced Breakdown Spectroscopy

Chunlong, 王春龙 Wang; Jianguo, 刘建国 Liu; Nanjing, 赵南京 Zhao; Huan, 石焕 Shi; Cuiping, 鲁翠萍 Lu; Lituo, 刘立拓 Liu; Mingjun, 马明俊 Ma; Wei, 章炜 Zhang; Dong, 陈东 Chen; Yujun, 张玉钧 Zhang; Wenqing, 刘文清 Liu

doi:10.3788/cjl201138.1115002

Cited by 6 publications

(2 citation statements)

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“…In addition, laser ablation in solutions is always affected by the surrounding pressure, and laser-generated plasma usually encounters rapid annihilation, 23 resulting in a shortened plasma lifetime and accordingly weakened breakdown of spectral line signals. Various methods including phase transformation 24 – 27 and metal substrate assistance 8 , 28 , 29 have been proposed to improve the detection sensitivity of LIBS in solutions. The drawbacks that restrict directly analyzing liquids could also be partially subdued by dual-pulse LIBS (DP-LIBS) techniques 30 , 31 or creating fluid jets 32 .…”

Section: Introductionmentioning

confidence: 99%

Detection of trace metals in water by filament- and plasma-grating-induced breakdown spectroscopy

Shi

et al. 2023

Adv. Photon. Nexus

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Filament-and plasma-grating-induced breakdown spectroscopy (F-GIBS) was demonstrated as an efficient technique for sensitive detection of metals in water, where plasma gratings were established through synchronized nonlinear interaction of two noncollinear filaments and an additional filament was generated with another fs laser beam propagating along their bisector. A water jet was constructed vertically to the three coplanar filaments, overcoming side effects from violent plasma explosion and bubble generation. Three distinct regimes of different mechanisms were validated for nonlinear couplings of the third filament with plasma gratings. As the third filament was temporally overlapped with the two noncollinear filaments in the interaction zone, all the three filaments participated in synchronous nonlinear interaction and plasma grating structures were altered by the addition of the third filament. As the third filament was positively or negatively delayed, the as-formed plasma gratings were elongated by the delayed third filament, or plasma gratings were formed in the presence of plasma expansion of the ahead third filament, respectively. Using F-GIBS for trace metal detection in water, significant spectral line enhancements were observed.

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Section: Introductionmentioning

confidence: 99%

Detection of trace metals in water by filament- and plasma-grating-induced breakdown spectroscopy

Shi

et al. 2023

Adv. Photon. Nexus

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“…Vander et al [10] first used graphite as the base and the result showed that the LIBS signal was stable. Then Wang et al [11] and Shi et al [12] measured Pb and Ni enriched on a graphite flake in water and the limits of detection (LOD) were, respectively, 0.0665 mg/L and 0.280 mg/L. However, the manual titration and oven heating which were used for graphite sample preparation in the above studies could not meet the needs of automatic and in situ detection.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Heavy Metals in Water Based on LIBS with an Automatic Device for Sample Preparation

Zhao

Liu

et al. 2015

Plasma Sci. Technol.

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Heavy metals in water can be deposited on graphite flakes, which can be used as an enrichment method for laser-induced breakdown spectroscopy (LIBS) and is studied in this paper. The graphite samples were prepared with an automatic device, which was composed of a loading and unloading module, a quantitatively adding solution module, a rapid heating and drying module and a precise rotating module. The experimental results showed that the sample preparation methods had no significant effect on sample distribution and the LIBS signal accumulated in 20 pulses was stable and repeatable. With an increasing amount of the sample solution on the graphite flake, the peak intensity at Cu I 324.75 nm accorded with the exponential function with a correlation coefficient of 0.9963 and the background intensity remained unchanged. The limit of detection (LOD) was calculated through linear fitting of the peak intensity versus the concentration. The LOD decreased rapidly with an increasing amount of sample solution until the amount exceeded 20 mL and the correlation coefficient of exponential function fitting was 0.991. The LOD of Pb, Ni, Cd, Cr and Zn after evaporating different amounts of sample solution on the graphite flakes was measured and the variation tendency of their LOD with sample solution amounts was similar to the tendency for Cu. The experimental data and conclusions could provide a reference for automatic sample preparation and heavy metal in situ detection.

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Quantitative Analysis of Trace Metals in Aqueous Solutions by Laser Induced Breakdown Spectroscopy Combined with Filter Paper Assisted Analyte Enrichment

Xiu

Gao

et al. 2020

J Appl Spectrosc

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Enrichment of Trace Lead in Water with Graphite and Measurement by Laser-Induced Breakdown Spectroscopy

Cited by 6 publications

References 0 publications

Detection of trace metals in water by filament- and plasma-grating-induced breakdown spectroscopy

Detection of trace metals in water by filament- and plasma-grating-induced breakdown spectroscopy

Quantitative Analysis of Heavy Metals in Water Based on LIBS with an Automatic Device for Sample Preparation

Quantitative Analysis of Trace Metals in Aqueous Solutions by Laser Induced Breakdown Spectroscopy Combined with Filter Paper Assisted Analyte Enrichment

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