研究目的
To study a rapid analysis method to evaluate velvet antler products qualitatively, using laser-induced breakdown spectroscopy (LIBS).
研究成果
The combination of LIBS and PLS-DA can distinguish the quality of velvet antler successfully. The model robustness can be improved by using feature lines as input variables.
研究不足
The study did not find an emission line of phosphorus in the LIBS spectra, possibly due to an unsuitable delay time setting, which must be studied carefully in the future.
1:Experimental Design and Method Selection:
Used LIBS combined with PCA and PLS-DA for rapid discrimination between inferior and good quality velvet antler samples.
2:Sample Selection and Data Sources:
Four kinds of velvet antler samples (one good quality and three inferior quality) were used.
3:List of Experimental Equipment and Materials:
A Q-switched flash lamp-pumped Nd:YAG nanosecond laser, a two-channel spectrometer, and a delay generator were used.
4:Experimental Procedures and Operational Workflow:
LIBS spectra were measured in atmospheric environment, with 240 spectra obtained for four kinds of samples.
5:Data Analysis Methods:
PCA was used to analyze the LIBS spectral data and obtain the feature spectral lines. PLS-DA was employed to classify the velvet antler samples with differing qualities.
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