Determination of copper, magnesium, and manganese in aluminum alloys using laser-induced breakdown spectroscopy based on fiber laser ablation

Abstract

Fiber lasers are characterized by high efficiency, good beam quality, and high reliability and are widely used in industries. In addition, the high repetition frequency of fiber lasers can increase the analytical efficiency greatly. In this paper, a nanosecond fiber laser was introduced to be the ablation source in laser-induced breakdown spectroscopy (LIBS) for determining copper, magnesium, and manganese in aluminum alloys. Because of the high repetition frequency of the fiber laser, the conventional delay-acquisition strategy was unavailable. Discrete wavelet transform (DWT) was used to mitigate the interference of the Bremsstrahlung background. Standard calibration and internal calibration methods were also compared for quantitative analyses. The results demonstrated that the combination of DWT and internal calibration effectively improved the analytical accuracy. After optimization, the R2s of the FL-LIBS system for Cu, Mg, and Mn were 0.9897, 0.9964, and 0.9979, respectively; the root mean squared error of cross validation was 0.0414, 0.0462, and 0.031 wt. %, respectively. This study provides a convenient method for the rapid elemental analysis of aluminum alloys.

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

“…A third paper, again by the same group, discussed the use of bre-laser LIBS for the determination of Cu, Mg and Mn in aluminium alloys. 44 Random noise and interferences on LIBS spectra degrade the quality of the analytical data and so some method of removing them can be very benecial. A paper by Yao et al reported the use of spectral ltering to achieve an improvement in accuracy during the femtosecond LIBS analysis of aluminium alloys.…”

“…Gold nanoparticles of 100 nm were used as a particle standard. With the exception of 44 Ca, only the most abundant isotopes of each element were used for data processing. Approximately 2000 particles were observed per injection of 300 mL and for a measurement duration of 1 min.…”

“…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. 44…”