期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 65, 期 11, 页码 935-942出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2010.09.003
关键词
Laser induced breakdown spectroscopy (LIBS); Double-pulse laser; Polymers; Time-resolved plasma plume photography
类别
资金
- Federal Ministry of Economy, Family and Youth
- National Foundation for Research, Technology and Development in Austria
Laser induced breakdown spectroscopy (LIBS) is an emerging technique for fast and accurate compositional analysis of many different materials. We present a systematic study of collinear double-pulse LIBS on different technical polymers such as polyamide, polyvinyl chloride, polyethylene etc. Polymer samples were ablated in air by single-pulse and double-pulse Nd:YAG laser radiation (8 ns pulse duration) and spectra were recorded with an Echelle spectrometer equipped with an ICCD camera. We investigated the evolution of atomic and ionic line emission intensities for different delay times between the laser pulses (from 20 ns to 500 mu s) at a laser wavelength of 532 nm. We observed double-pulse LIBS signals that were enhanced as compared to single-pulse measurements depending on the delay time and the type of polymer material investigated. LIBS signals of polymer materials that are enhanced by double-pulse excitation may be useful for monitoring the concentration of heavy metals in polymer materials. (C) 2010 Elsevier B.V. All rights reserved.
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