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Sorting zamak alloys via chemometric analysis of its LIBS spectra


Laser induced breakdown spectroscopy with chemometric methods have been employed for sorting zamak alloy (zinc based alloy) samples. Plasma plumes were created onto the samples surface using 50 mJ Nd:YAG laser pulses at its fundamental wavelength (= 1064 nm). Six types of zinc alloy samples with different elemental compositions have been used to perform the LIBS measurements on optimized experimental conditions. On the obtained LIBS data three different chemometric classification models were applied, namely K Nearest Neighbor (KNN), Support Vector Machine (SVM) and Artificial Neural Networks (ANN). The effect of the input database choice and their normalization on the classification models efficiency has been investigated and found to play a crucial role. It was found that KNN, SVM and ANNs permit an appropriate classification of different zinc alloys using LIBS spectra and the best results were obtained from the largest input database. The effect of data normalization has been discussed for each model. The obtained results demonstrate the feasibility of using chemometric methods associated with LIBS technique as an industrial tool for in situ zamak sorting.

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Publication details

The article was accepted on 17 May 2017 and first published on 17 May 2017

Article type: Paper
DOI: 10.1039/C7AY01138E
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Sorting zamak alloys via chemometric analysis of its LIBS spectra

    S. Messaoud Aberkane, M. Abdelhamid, F. mokdad, K. yahiaoui, S. messaci and M. Harith, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01138E

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