Modified iterative wavelets for background removal in laser-induced breakdown spectroscopy based on fiber laser ablation

Abstract

With the advantages of long-time operation and stable power, fiber lasers have been widely used in the industrial field, and show great potential in laser-induced breakdown spectroscopy (LIBS). However, the...

Denoising preprocessing using novel wavelet threshold functions in laser-induced breakdown spectroscopy based on fiber laser

“…35 Therefore, before denoising, the background was removed using iterative wavelet transform. 36 Theoretically, self-absorption under low concentration, without considering any noise interference, and the relationship between the spectral intensity and the element concentration is linear. The linear fitting in the calibration curve was established to demonstrate the accuracy change before and after noise removal.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…A related paper by the same group also used background removal methodology based on modified iterative wavelets for fibre-based LIBS. 43 In this paper, the methodology developed was compared to two conventional background removal methods and was found to provide the most accurate data. A third paper, again by the same group, discussed the use of fibre-laser LIBS for the determination of Cu, Mg and Mn in aluminium alloys.…”

“…Several interesting applications have also been presented during this review period. Included in this number is a paper by Guselnikova et al who determined a suite of analytes (43) in high purity germanium using ICP-MS following a matrix removal through volatilization processing procedure. 222 The volatilisation procedure was discussed in detail, but basically involved the electrolytic production of chlorine gas which was then dried by passing it through sulfuric acid and then used to volatilise the sample (1 g) at a temperature of 230 °C.…”

Determination of Molybdenum, Nickel, and Chromium in Low-alloy Steels Using Laser-induced Breakdown Spectroscopy Assisted with Laser-induced Fluorescence and Discrete Wavelet Transform

“…Wavelet transform is a powerful signal decomposition method, firstly proposed by D. G. Childers et al 43 Discrete wavelet transform (DWT) was demonstrated to remove plasma bremsstrahlung background in LIBS. 44 Without subjective operation and blank range need, DWT is probably effective in removing laser scattering background in steel plasma with self-adaptive ability.…”