title: [Laser ignition assisted spark-induced breakdown spectroscopy for element analysis of aluminum alloy with enhanced sensitivity].
abstract: The analytical performance of laser ignition assisted spark-induced breakdown spectroscopy (LI-SIBS) for the analysis of trace metal in aluminum alloy was reported in the present article. In order to improve the analytical performance of spark-induced breakdown spectroscopy, a low energy laser pulse was focused on the surface of the sample to produce plasma between discharge electrodes to trigger high voltage spark discharge. Under current geometrical arrangement, optimized discharge voltage and capacitance were determined, and copper in aluminum alloy was analyzed under optimized experimental condition. The limit of detection of copper in aluminum alloy was determined to be 0.7 ppm. Both signal stability and measurement accuracy for spark-induced breakdown spectroscopy were improved with the assistance of laser ignition. The discharge voltage could be reduced and the spatial resolution could be improved with the assistance of laser ignition at the same time. It was demonstrated that LI-SIBS has the characteristics of high sensitivity, good stability and better spatial resolution and is suitable for trace elements analysis in different alloys.
authors.affiliation: Department of Physics, School of Science, South China University of Technology, Guangzhou 510641, China. 469707369@qq.com
authors.forename: Fei-fei
authors.initials: FF
authors.lastname: Peng
authors.affiliation: Department of Physics, School of Science, South China University of Technology, Guangzhou 510641, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: Department of Physics, School of Science, South China University of Technology, Guangzhou 510641, China.
authors.forename: Yu-qi
authors.initials: YQ
authors.lastname: Chen
authors.affiliation: Department of Physics, School of Science, South China University of Technology, Guangzhou 510641, China.
authors.forename: Run-hua
authors.initials: RH
authors.lastname: Li