研究目的
Investigating the use of laser-induced breakdown spectroscopy (LIBS) for food authentication to detect adulterants and verify geographical origin.
研究成果
LIBS is a promising technique for food authentication, offering rapid, high-throughput analysis. However, improvements in sensitivity, sample preparation, and instrument design are needed for broader application.
研究不足
Challenges include sensitivity for trace elements detection, sample preparation requirements, and the need for instrument miniaturization for portable applications.
1：Experimental Design and Method Selection:
LIBS was used for rapid, high-throughput, micro-destructive and multi-elemental analysis of food samples.
2：Sample Selection and Data Sources:
Various food products were analyzed, including dairy products, meat, and coffee, to detect adulteration and verify geographical origin.
3：List of Experimental Equipment and Materials:
LIBS setup included a laser, spectrometer, and samples prepared by drying, powdering, and pressing into pellets.
4：Experimental Procedures and Operational Workflow:
Samples were analyzed by focusing laser pulses to create plasma, with emitted light detected by a spectrometer.
5：Data Analysis Methods:
Chemometric techniques such as PCA, PLS-DA, and neural networks were used for data analysis and classification.
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