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  Indian J Med Microbiol
 

Figure 3: Principal component analysis (PCA) score plot shows samples distribution and groupings based on PCA of spectra in the form of (A) raw spectra, (B) baseline-corrected, (C) smoothing by standard normal variate (SNV), (D) first-order derivatives and SNV processing. The red circle indicates the clustering of halal API on the positive side of the score plot

Figure 3: Principal component analysis (PCA) score plot shows samples distribution and groupings based on PCA of spectra in the form of (A) raw spectra, (B) baseline-corrected, (C) smoothing by standard normal variate (SNV), (D) first-order derivatives and SNV processing. The red circle indicates the clustering of halal API on the positive side of the score plot