Sequential, time-integrated collector of precipitation, ground water, and surface water for analysis of isotopes

A sequential, time-integrated collector having an electronic controller that actuates either of two electrically-actuated valves, each connected to a water reservoir. At a preset time interval (e.g., every 30 minutes), time-integrated water samples are transferred into sample vials in a multi-sample carousel. Evaporation that could change the isotopic composition of a precipitation sample is minimized by sealing the opening of each sample vial by pressing each vial against a flat, low-friction surface, such as a Teflon® sheet, from the time each sample vial is filled until it is removed from the collector.
Inventors: 

Tyler Benjamin Coplen, II

Patent Number: 
US7687028
Patent Issue Date: 
April 30, 2010
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