LI Xiangyou,LI Jiaming,GUO Lianbo,ZENG Xiaoyan,LU Yongfeng,HAO Zhongqi,ZHOU Ran,TANG Yun,YANG Ping
申请号：
US201816035072
公开号：
US2018335388(A1)
申请日:
2018.07.13
申请国别(地区):
美国
年份:
2018
代理人:
摘要：
The present invention belongs to the field of laser plasma emission spectrometry, and in particular relates to a method for improving the detection sensitivity on a carbon element in laser-induced breakdown spectroscopy. The method specifically comprises the following steps: ablating the surface of a sample to be tested by using a laser beam emitted so as to rapidly heat the surface of the sample and the ambient air close to the surface of the sample into plasma, atomize carbon in the sample and nitrogen in the ambient gas, and combine carbon with the nitrogen into C—N radicals; tuning a wavelength-tunable laser to a wavelength needed by stimulated absorption transition of C—N radicals, and outputting a laser beam to radiate the plasma so that stimulated absorption transition of C—N radicals is carried out, then fluorescent signals are emitted with spontaneous radiative transition; collecting and recording an emission fluorescence spectrum of the C—N radicals; and qualitatively or quantitatively analy
