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<http://webisa.webdatacommons.org/304865619>	<http://www.w3.org/ns/prov#value>	"The present invention generally relates to methods and apparatus for analyzing solids, liquids and gases for the presence of several trace elements simultaneously and more particularly to methods and apparatus for analyzing solids, liquids and gases for several valuable or hazardous trace elements simultaneously using compact, portable trace element sensor devices which are portable by an individu" .