Laser-induced breakdown spectroscopy (LIBS)is a real-time and rapid analysis method, which can realize quantitative analysis of element concentration in solid, liquid or gaseous samples. In this paper, a micro-LIBS system was designed for the quantitative analysis of heavy metals concentration in polluted water. The composition of the elements in the polluted water is abundant. Therefore, the characteristic spectral lines of heavy metal elements in polluted water are easy to be overlapped with adjacent characteristic spectral lines due to the spectral line broadening. This paper introduces the Fourier self-deconvolution (FSD) method to solve the problem of characteristic spectral overlap in LIBS quantitative analysis of heavy metals in polluted water. Fourier self-deconvolution (FSD) can decrease the spectral linewidth by taking deconvolution on the spectral using the shape information of the spectral itself. By combining the FSD with other methods such as baseline removal, wavelet domain denoising, spectral normalization and outlier discarding, the LIBS detection limit of Pb concentration in polluted water can reach 79.66 ppm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.