4.7 Article

Efficient detection of emission lines for H and O and the use as an internal standard for underwater LIBS

期刊

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 36, 期 2, 页码 345-351

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ja00433b

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  1. JSPS KAKENHI [JP20H02764]
  2. China Scholarship Council (CSC)

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The study found that using laser pulses with a duration of 100 ns or longer can better detect the atomic lines of H and O in water, resulting in higher emission intensity and longer plasma persistence time. By using O as an internal standard, the quantification performance showed better linearity, higher stability, and lower limit of detection.
The effects of pulse duration on spectral emission of H and O obtained by laser-induced breakdown spectroscopy (LIBS) in bulk water have been investigated. We found distinct atomic lines of H and O by irradiating with a laser pulse of 100 ns duration or longer. The time-resolved emission spectra show that higher emission intensity and longer plasma persistence time can be obtained with the increase of pulse duration. The quantification performance by using O as an internal standard demonstrates better linearity, higher stability and lower limit of detection (LOD). The present results suggest that the use of a long ns pulse is essential for the efficient detection of atomic lines of H and O in underwater single-pulse LIBS, which can serve as a good internal standard for quantitative analysis.

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