Self-absorption correction method for one-point calibration laser-induced breakdown spectroscopy

Authors：Hu, Zhenlin; Nie, Junfei; Ouyang, Zhiyong; Zhang, Deng; Liu, Yuanchao; Chu, Yanwu; Guo, Lianbo^*

Source：Optics Letters, 2023, 48(1): 1-4.

DOI：10.1364/OL.472224

• PLASMA

As an important variant of calibration-free laser-induced breakdown spectroscopy (CF-LIBS), one-point calibration LIBS (OPC-LIBS) corrects the Boltzmann plot of the unknown sample by using one known sample and obtains higher quantitative accuracy than CF-LIBS. However, the self-absorption effect restricts its accuracy. In this work, a new self-absorption correction (SAC) method for OPC-LIBS is proposed to solve this problem. This method uses an algorithm to correct the self-absorption and does not require the calculation of the self-absorption coefficient. To verify the effectiveness of this SAC method, Ti, V, and Al elements in two titanium alloys were determined by clas-sical OPC-LIBS and OPC-LIBS with SAC. The average relative errors (AREs) of all elements in the two samples were decreased from 8.78% and 9.28% to 8.07% and 7.56%, respectively. The results demonstrated the effectiveness of this SAC method for OPC-LIBS.

• Institution
  华中科技大学