Detection of Adulteration of Panax Notoginseng Powder by Terahertz Technology

Figure 9

Results of the PLS model of Panax notoginseng powder adulteration; (a) is the diagram of principal component factor; (b) is scatter diagram of adulterating with zedoary turmeric powder; (c) is the diagram of principal component factor; (d) is scatter diagram of adulterating with rice flour; (e) is the diagram of principal component factor; (f) is scatter diagram of adulterating with wheat flour.

(a)

(b)

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(d)

(e)

(f)