Ultraviolet-Visible Spectroscopy and Chemometric Strategy Enable the Classification and Detection of Expired Antimalarial Herbal Medicinal Product in Ghana

<div>PCA plot for PC1 (37.51%) vs. PC2 (26.38%) vs. PC3 (18.74%) for training set, validation set, and expired products HMP4X. HMP1—red circles, HMP2—purple squares, HMP3—green diamonds, HMP4—red pentagrams, and HMP5—blue triangles. Black triangles: HMP4X. Training and validation data are represented by hollow and filled markers, respectively.</div>

International Journal of Analytical Chemistry

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Figure 4

Figure 4: Ultraviolet-Visible Spectroscopy and Chemometric Strategy Enable the Classification and Detection of Expired Antimalarial Herbal Medicinal Product in Ghana 

Figure 4 | Ultraviolet-Visible Spectroscopy and Chemometric Strategy Enable the Classification and Detection of Expired Antimalarial Herbal Medicinal Product in Ghana 