Method and apparatus for water sampling utilizing solid phase extraction
AssigneeIsco, Inc.
InventorsRobert R. Fiedler, Dale A. Davison
Life of this patent
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Abstract
A method and apparatus for water sampling utilizing on-site solid phase extraction that permits high sample flow rates and eliminates the requirement for sample storage. Samples are collected at a relatively high flow rate and then temporarily stored under pressure before passing through a solid phase extraction device at a slower rate commensurate with the flow rate tolerance of the device. Each sample quantity is also automatically measured, eliminating the requirement for sample storage and subsequent manual quantity measurement and/or transportation to a laboratory.
Claims2
A method for sampling water utilizing solid phase extraction comprising:
- quickly withdrawing a water sample from a body of water to be sampled at a collection flow rate within a first period of time;
- storing said water sample under pressure in a pressure chamber;
- and
- slowly passing said water sample from said pressure chamber through a solid phase extraction device having a maximum flow rate capability which is lower than said collection flow rate within a second period of time, said second period of time being longer than said first period of time.
A method for sampling water utilizing solid phase extraction comprising:
- quickly withdrawing a water sample from a body of water to be sampled at a collection flow rate within a first period of time;
- storing said water sample under pressure in a pressure chamber;
- slowly passing said water sample from said pressure chamber through a solid phase extraction device having a maximum flow rate capability which is lower than said collection flow rate within a second period of time, said second period of time being longer than said first period of time;
- and
- automatically determining a quantity of water passed through said solids phase extraction device.
Dependencies are inferred from the claim text.