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Detection of zinc and lead in water using evaporative preconcentration and single-particle laser-induced breakdown spectroscopy.
- Source :
-
Spectrochimica Acta Part B . Aug2013, Vol. 86, p55-59. 5p. - Publication Year :
- 2013
-
Abstract
- Abstract: A novel laser-induced breakdown spectroscopy (LIBS)-based measurement method for metals in water is demonstrated. In the presented technology a small amount of sodium chloride is dissolved in the sample solution before spraying the sample into a tubular oven. After water removal monodisperse dry NaCl aerosol particles are formed where trace metals are present as additives. A single-particle LIBS analysis is then triggered with a scattering based particle detection system. Benefits are the highly increased metal concentration in the LIBS focal volume and the static NaCl-matrix which can be exploited in the signal processing procedure. Emitted light from the emerged plasma plume is collected with wide angle optics and dispersed with a grating spectrometer. In an aqueous solution, the respective limits of detection for zinc and lead were 0.3ppm and 0.1ppm using a relatively low 14mJ laser pulse energy. Zn/Na peak intensity ratio calibration curve for zinc concentration was also determined and LIBS signal dependence on laser pulse energy was investigated. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 05848547
- Volume :
- 86
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part B
- Publication Type :
- Academic Journal
- Accession number :
- 89436147
- Full Text :
- https://doi.org/10.1016/j.sab.2013.04.010