Trace Elements Argentina 10 article 8 trace element 8 Trace elements 6 Water Pollutants, Chemical 6 Animals 4 Aquifers 4 Arsenic 4 Drinking Water 4 Environmental Monitoring 4 Geographical origins 4 Groundwater 4 Groundwater pollution 4 Groundwater resources 4 High pH 4 Isotopes 4 Isotopic composition 4 Mass Spectrometry 4 Mass spectrometers 4 Shallow aquifers 4 Sodium 4 Soil 4 Soils 4 Spectrometry 4 arsenic 4 authenticity 4 chemical analysis 4 discriminant analysis 4 environmental impact 4