Adult 1 Animals 1 Calibration 1 Child, Preschool 1 Dimethylformamide 1 Elemental compositions 1 Germanium 1 High-efficiency 1 Humans 1 Inductively coupled plasma 1 Inductively coupled plasma mass spectrometries (ICPMS) 1 Inductively coupled plasma mass spectrometry 1 Infant 1 Infant, Newborn 1 Lead 1 Limits of detection 1 Manganese 1 Mass Spectrometry 1 Mass spectrometers 1 Mass spectrometry 1 Milk 1 Milk analysis 1 N ,N-Dimethylformamide 1 Organic solvents 1 Plasma Gases 1 Principal Component Analysis 1 Principal component analysis 1 Principal components analysis 1 Quality control 1 Sample introduction 1