Fig. 3From: Multivariate analysis of energy dispersive X-ray diffraction data for the detection of illicit drugs in border controlCalibration results. a RMSECV for PLS calibration models of diamorphine concentration with a minimum at 5 factors and RMSECV of 5.8%. b Predicted diamorphine concentrations from 5 factor PLS model vs. weighed concentrationsBack to article page