研究目的
To discriminate the geographical origins of honey using laser-induced breakdown spectroscopy (LIBS) combined with multivariate methods.
研究成果
LIBS combined with multivariate methods can effectively discriminate the geographical origins of honey, with SVM performing better than LDA. The method provides a fast approach for food traceability.
研究不足
The study was limited by the complexity of reciprocal effects of botanical and geographical origins on honey samples, which made discrimination challenging in some cases.
1:Experimental Design and Method Selection:
LIBS was used to analyze honey samples from different geographical origins. PCA, LDA, and SVM were employed for data analysis and classification.
2:Sample Selection and Data Sources:
Honey samples were collected from local producers, including acacia honey and multi-floral honey from different geographical origins.
3:List of Experimental Equipment and Materials:
A laboratory-assembled LIBS device, laser (Vlite 200, Beamtech), Echelle spectrograph (ME 5000, Andor), and intensified charge coupled device (ICCD, DH334T-18F-03, Andor) were used.
4:Experimental Procedures and Operational Workflow:
Honey samples were analyzed using LIBS with specific laser parameters. Spectra were collected and analyzed using PCA, LDA, and SVM.
5:Data Analysis Methods:
PCA was used for visualization and feature variable determination. LDA and SVM were used for quantitative classification of geographical origins.
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