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Abstract
Laser-induced breakdown spectroscopy (LIBS) was applied to perform a rapid elemental analysis and provenance study of Blumea balsamifera DC. Principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) were implemented to exploit the multivariate nature of the LIBS data. Scores and loadings of computed principal components visually illustrated the differing spectral data. The PLS-DA algorithm showed good classification performance. The PLS-DA model using complete spectra as input variables had similar discrimination performance to using selected spectral lines as input variables. The down-selection of spectral lines was specifically focused on the major elements of B. balsamifera samples. Results indicated that LIBS could be used to rapidly analyze elements and to perform provenance study of B. balsamifera.
Highlights
Blumea balsamifera DC, a medicinal herb, is widely distributed in Eastern and Southeastern Asia.It has been used in folk medicine by Chinese minority groups for the treatment of septic wounds, respiratory infections, and stomach pains [1,2,3]
Provenance study of herbal medicinal species is usually restricted to the detection of a few active components using high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS), etc
This study investigated the feasibility of Laser-induced breakdown spectroscopy (LIBS) for rapid analysis of medical herbs composition and their provenance
Summary
Blumea balsamifera DC, a medicinal herb, is widely distributed in Eastern and Southeastern Asia. It has been used in folk medicine by Chinese minority groups for the treatment of septic wounds, respiratory infections, and stomach pains [1,2,3]. This herb is useful for the treatment of Sensors 2015, 15 fever, lumbago, increasing appetite, skin diseases, wounds, liver cirrhosis, and kidney stones [4]. The elemental composition of a plant has a great impact on its quality, and depends on its provenance, a rapid and accurate elemental analysis method is necessary to study the provenance of medicinal herbs
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