Correction Of Self-Absorption Effect In Laser-Induced Breakdown Spectroscopy Analysis For Sea Salt Aerosols Using A Duplicating Mirror

Abstract

: Sea salt aerosols significantly impact marine ecosystems and climate change; however, self-absorption effects unavoidably occur in the detection of sea salt aerosols via laser-induced breakdown spectroscopy (LIBS). This work illustrates the application of a renowned replica plasma method for self-absorption correction in the detection of sea salt aerosols via LIBS. Two sets of spectral data were obtained by adding a duplicating mirror behind the plasma, and the self-absorption correction factor was calculated using a previously described method. Consequently, the experimental results show a marked improvement in the linearity of the calibration curve. The determination coefficients of linear fitting were above 0.99, and the root mean square error of the cross-validation RMSECV was negligible. The duplicating mirror method for self-absorption correction in the detection of sea salt aerosols via LIBS can thus achieve high accuracy and stability within a certain range and therefore can prove useful for sea salt aerosol, aerosol, and gas detection.