Direct Analysis of Pharmaceutical Drugs Using Nano-DESI MS

Figure 3

PCA scores of all samples. Matrix consisted of 63 samples and 112 ions. Important ions contributing to the new PCs according to the X-loadings are m/z 110, 152, 365, 366, 475, and 476. The red circle shows ibuprofen containing medicines, the yellow circle shows tadalafil containing samples, and the green circle shows Viagra-type tablets.