Methamphetamine Heirarchial Partial Least Squares (HPLS) Regression Currently used UPLC method vs new proposed ATR FTIR method (Figure 4)

<p>from published article: Rapid Quantification of Methamphetamine: Using Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Chemometrics</p> <p>Hughes J, Ayoko G, Collett S, Golding G (2013) Rapid Quantification of Methamphetamine: Using Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Chemometrics. PLoS ONE 8(7): e69609. doi:10.1371/journal.pone.0069609</p> <p>figure doi:10.1371/journal.pone.0069609.g004