Effect of Parallel Plate Constraint on CN Molecular Spectra in Laser-Induced PMMA Plasma

Xue, 杨雪 Yang; Anmin, 陈安民 Chen; Suyu, 李苏宇 Li; Yuanfei, 姜远飞 Jiang; Mingxing, 金明星 Jin

doi:10.3788/cjl202047.0811002

Cited by 2 publications

(1 citation statement)

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“…Therefore, the spatial confinement LIBS-based method is widely used in applications. The constraints include parallel plate constraint [19] or flat mirror constraint [20], cylindrical constraint [21], and conical constraint [22] or hemispherical constraint [23]. The spatial constraints on the plasma range from one dimension to two dimensions to three dimensions, with higher dimensional constraint resulting in more enhancement.…”

Section: Journal Of the European Opticalmentioning

confidence: 99%

Detection of zinc in pig feed based on the cavities of different shapes combined with LIBS

Li,

Huang,

et al. 2024

J. Eur. Opt. Society-Rapid Publ.

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Considering the serious risks posed by the heavy metals present in pig diets, monitoring and controlling the amount of these metals is crucial. The laser-induced breakdown spectroscopy (LIBS) is a promising technique for performing elemental analysis due to its unique advantages, such as rapid, in situ, nondestructive, and online detection of various minerals. In order to improve the detection accuracy and detection limit (LOD) of elements, the spatial constraint combined with laser-induced breakdown spectroscopy (CC-LIBS) is used to detect the quantity of zinc in pig feed and achieve the detection of samples with lower concentrations. Zn I 480.86 nm is selected as the characteristic spectral line, and the effects of different two-dimensional (cylindrical) and three-dimensional (hemispherical, truncated cone) cavities on the enhancement factor are compared under different. The results show that the optimal conditions include a circular constrained cavity D5H2, a delay time of 2.08, and an enhancement factor of 3.01 associated with the analytical spectral line. The detection limit of zinc in samples under CC-LIBS is 62.67 mg/kg (the recommended quantity of zinc in pig diet mentioned in the safe use of feed additives is 43-80 mg/kg), which is 35.65% lower than that under the LIBS (97.39 mg/kg). Therefore, this work provides a new test basis and idea for the detection of zinc in pig feed.

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