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All Journal Journal of Engineering and Technological Sciences Indonesian Journal of Halal Research
Syahrun Nur Abdulmadjid
1Department of Electrical and Electronic Engineering, Faculty of Engineering, Fukui University, 9-1 bunkyo 3-chome, Fukui 910-8507, Japan
Religion Biochemistry, Genetics & Molecular Biology Engineering Environmental Science Medicine & Pharmacology Other

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Low-Cost Real-Time Gas Monitoring Using a Laser Plasma Induced by a Third Harmonic Q-Switched Nd-YAG Laser Abdulmadjid, Syahrun Nur; Kurniawan, Koo Hendrik; Lie, Tjung Jie; Lee, Yong Inn; Kitazima, Iwao; Kagawa, Kiichiro
Journal of Engineering and Technological Sciences Vol 37, No 2 (2005)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (761.365 KB) | DOI: 10.5614/itbj.eng.sci.2005.37.2.2

Abstract

A gas plasma induced by a third harmonic Nd-YAG laser with relatively low pulsed energy (about 10 mJ) has favorable characteristics for gas analysis due to its low background characteristics, nevertheless a high power fundamental Nd-YAG laser (100-200 mJ) is widely used for laser gas breakdown spectroscopy. The air plasma can be used as a low-cost real-time gas monitoring system such that it can be used to detect the local absolute humidity, while a helium plasma can be used for gas analysis with a high level of sensitivity. A new technique using a helium plasma to improve laser ablation emission spectroscopy is proposed. Namely, the third harmonic Nd-YAG laser is focused at a point located some distance from the target in the 1-atm helium surrounding gas. By using this method, the ablated vapor from the target is excited through helium atoms in a metastable state in the helium plasma.
Laser-Induced Breakdown Spectroscopy (LIBS) Coupled with PCA and PLS for Identification and Adulteration Detection of Halal Meat Products Ahmad, Khairunnas; Saiful, Saiful; Abdulmadjid, Syahrun Nur; Prasetyo, Siswoyo
Indonesian Journal of Halal Research Vol. 7 No. 2 (2025): August
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ijhar.v7i2.42382

Abstract

Pork adulteration in halal meat is a significant issue in Indonesia, emphasizing the need for accurate methods to ensure product authenticity and protect consumers. This study aims to identify various meat products and evaluate the use of Laser-Induced Breakdown Spectroscopy (LIBS) in combination with Principal Component Analysis (PCA) and Partial Least Squares (PLS) for detecting meat adulteration. Samples were collected from various sources and analyzed using LIBS, with PCA used to distinguish meat species qualitatively and PLS to assess adulteration quantitatively. LIBS effectively distinguishes meat types, while PCA successfully identifies meat samples based on the intensity of the elemental compositions. PLS achieves high accuracy R2 > 0.99 in detecting pork adulteration in beef, buffalo, mutton, and chicken, surpassing single-line emission regression methods with low LOD (2.65%, 4.69%, 2.38%, and 3.41%) and LOQ (8.08%, 14.23%, 7.23%, and 10.34%) values. This study demonstrates that LIBS combined with PCA and PLS is a feasible and accurate method for identifying various meat types and detecting pork adulteration. The approach offers a reliable solution for addressing meat adulteration issues and ensuring halal application of LIBS with PCA and PLS for pork detection and quantification in halal meat product compliance.
Co-Authors Ahmad, Khairunnas Iwao Kitazima Kiichiro Kagawa Koo Hendrik Kurniawan Prasetyo, Siswoyo Saiful Saiful Tjung Jie Lie Yong Inn Lee