Rapid Identification of Nine Easily Confused Mineral Traditional Chinese Medicines Using Raman Spectroscopy Based on Support Vector Machine

Figure 2

The normalized, baseline corrected average spectra of each medicine: (a) gypsum fibrosum; (b) alumen; (c) sal ammoniac; (d) quartz; (e) natrii sulfas; (f) natrii sulfas exsiccatus; (g) calcite; (h) yellow croaker otolith; (i) borax.

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