DISCRIMINATION OF EXTRACTED ANIMAL FATS USING LASER-INDUCED BREAKDOWN SPECTROSCOPY ASSISTED WITH PRINCIPAL COMPONENT ANALYSIS

Nur Syaida Hanasil; Raja Kamarulzaman Raja Ibrahim; Maisarah Duralim; Husni Hani Jameela Sapingi

doi:10.11113/jt.v82.14121

Authors

Nur Syaida Hanasil Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
Raja Kamarulzaman Raja Ibrahim Laser Center, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
Maisarah Duralim Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
Husni Hani Jameela Sapingi Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia

DOI:

https://doi.org/10.11113/jt.v82.14121

Keywords:

LIBS, PCA, animal fats, plasma, liquid ablation

Abstract

This study focuses on the discrimination of extracted animal fats in liquid form using laser induced breakdown spectroscopy (LIBS) technique assisted with principal component analysis (PCA). The interaction of laser and liquid sample produces liquid splashing due to strong shock wave effect and subsequently generates lower intensity of LIBS signals. LIBS difficulties in liquid are resolved using paper substrate to enhance LIBS emission intensity. Laser pulse from Q-switched Nd:YAG laser with energy of 220 mJ and frequency of 1 Hz was used to ablate extracted animal fats. The obtained LIBS spectra of extracted animal fats were further evaluated using PCA. LIBS spectra are compressed and visualised as data points in the score plot of PCA. PCA results demonstrated that data points from different extracted animal fats were clustered separately in the score plot with variance greater than 90%. The findings show LIBS system assisted with PCA was capable to differentiate various extracted animal fats.

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