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Investigation into time evolution of chlorine emission in pulsed CO2 laser induced breakdown spectroscopy (LIBS)
Author(s) -
A. Sari,
Kurnia Lahna,
Muliadi Ramli,
Kazuyoshi Kurihara,
Nasrullah Idris
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/796/1/012030
Subject(s) - laser induced breakdown spectroscopy , chlorine , emission spectrum , laser , helium , materials science , atmospheric pressure , plasma , atomic emission spectroscopy , line (geometry) , analytical chemistry (journal) , spectroscopy , atomic physics , chemistry , optics , spectral line , inductively coupled plasma , physics , geometry , mathematics , quantum mechanics , astronomy , meteorology , metallurgy , chromatography
Detection of chlorine (Cl) using LIBS technique is greatly influenced by experimental conditions including the delay time of the detecting device. Time evolution of Cl emission in plasma produced on polyvinyl chloride (PVC) sample using CO 2 laser with variation of delay time has been carried out. The plasma was produced at atmospheric pressure under different environment of helium and air, respectively. It was found that when using the pulse energy of 750 mJ under helium surrounding, strong emission line of Cl at 479.45 nm can be observed until 4 μs of delay time, while when using laser energy 2500 mJ strong Cl emission line can be observed until 7 μs. The higher signal to background ratio was observed at delay time of 1 μs. However, Cl emission line cannot be detected under air environment.

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