Adult 2 Animals 2 Calibration 2 Child, Preschool 2 Dimethylformamide 2 Elemental compositions 2 Germanium 2 High-efficiency 2 Humans 2 Inductively coupled plasma 2 Inductively coupled plasma mass spectrometries (ICPMS) 2 Inductively coupled plasma mass spectrometry 2 Infant 2 Infant, Newborn 2 Lead 2 Limits of detection 2 Manganese 2 Mass Spectrometry 2 Mass spectrometers 2 Mass spectrometry 2 Milk 2 Milk analysis 2 N ,N-Dimethylformamide 2 Organic solvents 2 Plasma Gases 2 Principal Component Analysis 2 Principal component analysis 2 Principal components analysis 2 Quality control 2 Sample introduction 2