Electro-osmotically driven liquid delivery method and apparatus

Rakestraw, David J; Anex, Deon S; Yan, Chao; Dadoo, Rajeev; Zare, Richard N

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A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
A43 - footwear
A44 - haberdashery
A45 - hand or travelling articles
A46 - brushware
A47 - furniture
A61 - medical or veterinary science
A62 - life-saving
A63 - sports
A99 - subject matter not otherwise provided for in this section
B - performing operations
B01 - physical or chemical processes or apparatus in general
B02 - crushing, pulverising, or disintegrating
B03 - separation of solid materials using liquids or using pneumatic tables or jigs
B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
B05 - spraying or atomising in general
B06 - generating or transmitting mechanical vibrations in general
B07 - separating solids from solids
B08 - cleaning
B09 - disposal of solid waste
B21 - mechanical metal-working without essentially removing material
B22 - casting
B23 - machine tools
B24 - grinding
B25 - hand tools
B26 - hand cutting tools
B27 - working or preserving wood or similar material
B28 - working cement, clay, or stone
B29 - working of plastics
B30 - presses
B31 - making articles of paper, cardboard or material worked in a manner analogous to paper
B32 - layered products
B33 - additive manufacturing technology
B41 - printing
B42 - bookbinding
B43 - writing or drawing implements
B44 - decorative arts
B60 - vehicles in general
B61 - railways
B62 - land vehicles for travelling otherwise than on rails
B63 - ships or other waterborne vessels
B64 - aircraft
B65 - conveying
B66 - hoisting
B67 - opening, closing {or cleaning} bottles, jars or similar containers
B68 - saddlery
B81 - microstructural technology
B82 - nanotechnology
B99 - subject matter not otherwise provided for in this section
C - chemistry
C01 - inorganic chemistry
C02 - treatment of water, waste water, sewage, or sludge
C03 - glass
C04 - cements
C05 - fertilisers
C06 - explosives
C07 - organic chemistry
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C09 - dyes
C10 - petroleum, gas or coke industries
C11 - animal or vegetable oils, fats, fatty substances or waxes
C12 - biochemistry
C13 - sugar industry
C14 - skins
C21 - metallurgy of iron
C22 - metallurgy
C23 - coating metallic material
C25 - electrolytic or electrophoretic processes
C30 - crystal growth
C40 - combinatorial technology
C99 - subject matter not otherwise provided for in this section
D - textiles
D01 - natural or man-made threads or fibres
D02 - yarns
D03 - weaving
D04 - braiding
D05 - sewing
D06 - treatment of textiles or the like
D07 - ropes
D10 - indexing scheme associated with sublasses of section d, relating to textiles
D21 - paper-making
D99 - subject matter not otherwise provided for in this section
E - fixed constructions
E01 - construction of roads, railways, or bridges
E02 - hydraulic engineering
E03 - water supply
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F - mechanical engineering
F01 - machines or engines in general
F02 - combustion engines
F03 - machines or engines for liquids
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F05 - indexing schemes relating to engines or pumps in various subclasses of classes f01-f04
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F17 - storing or distributing gases or liquids
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F22 - steam generation
F23 - combustion apparatus
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F27 - furnaces
F28 - heat exchange in general
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F42 - ammunition
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G - physics
G01 - measuring
G02 - optics
G03 - photography
G04 - horology
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G06 - computing
G07 - checking-devices
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G09 - education
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Title: Electro-osmotically driven liquid delivery method and apparatus

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Abstract

Method and apparatus for controlling precisely the composition and delivery of liquid at sub-.mu.L/min flow rate. One embodiment of such a delivery system is an electro-osmotically driven gradient flow delivery system that generates dynamic gradient flows with sub-.mu.L/min flow rates by merging a plurality of electro-osmotic flows. These flows are delivered by a plurality of delivery arms attached to a mixing connector, where they mix and then flow into a receiving means, preferably a column. Each inlet of the plurality of delivery arms is placed in a corresponding solution reservoir. A plurality of independent programmable high-voltage power supplies is used to apply a voltage program to each of the plurality of solution reservoirs to regulate the electro-osmotic flow in each delivery arm. The electro-osmotic flow rates in the delivery arms are changed with time according to each voltage program to deliver the required gradient profile to the column.

Inventors:

Rakestraw, David J ^[1]; Anex, Deon S ^[2]; Yan, Chao ^[3]; Dadoo, Rajeev ^[4]; Zare, Richard N ^[4]

Fremont, CA
Livermore, CA
Pleasanton, CA
Stanford, CA

Issue Date:: Fri Jan 01 00:00:00 EST 1999

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

OSTI Identifier:: 872464

Patent Number(s):: 5942093

Assignee:: Sandia Corporation (Livermore, CA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N2030/285 - {electrically driven carrier}
G01N27/44704 - {Details

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DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: electro-osmotically; driven; liquid; delivery; method; apparatus; controlling; precisely; composition; sub-; flow; rate; embodiment; gradient; generates; dynamic; flows; rates; merging; plurality; electro-osmotic; delivered; arms; attached; mixing; connector; mix; receiving; means; preferably; column; inlet; placed; corresponding; solution; reservoir; independent; programmable; high-voltage; power; supplies; apply; voltage; reservoirs; regulate; arm; changed; time; according; deliver; required; profile; voltage power; flow rates; flow rate; receiving means; power supplies; electro-osmotic flow; liquid delivery; electro-osmotically driven; /204/

Citation Formats


                    Rakestraw, David J, Anex, Deon S, Yan, Chao, Dadoo, Rajeev, and Zare, Richard N. Electro-osmotically driven liquid delivery method and apparatus.  United States: N. p., 1999. 
        Web.

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                    Rakestraw, David J, Anex, Deon S, Yan, Chao, Dadoo, Rajeev, & Zare, Richard N. Electro-osmotically driven liquid delivery method and apparatus.  United States.

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                    Rakestraw, David J, Anex, Deon S, Yan, Chao, Dadoo, Rajeev, and Zare, Richard N. Fri .  
        "Electro-osmotically driven liquid delivery method and apparatus".  United States.  https://www.osti.gov/servlets/purl/872464.

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@article{osti_872464,

  title        = {Electro-osmotically driven liquid delivery method and apparatus},

  author       = {Rakestraw, David J and Anex, Deon S and Yan, Chao and Dadoo, Rajeev and Zare, Richard N},

  abstractNote = {Method and apparatus for controlling precisely the composition and delivery of liquid at sub-.mu.L/min flow rate. One embodiment of such a delivery system is an electro-osmotically driven gradient flow delivery system that generates dynamic gradient flows with sub-.mu.L/min flow rates by merging a plurality of electro-osmotic flows. These flows are delivered by a plurality of delivery arms attached to a mixing connector, where they mix and then flow into a receiving means, preferably a column. Each inlet of the plurality of delivery arms is placed in a corresponding solution reservoir. A plurality of independent programmable high-voltage power supplies is used to apply a voltage program to each of the plurality of solution reservoirs to regulate the electro-osmotic flow in each delivery arm. The electro-osmotic flow rates in the delivery arms are changed with time according to each voltage program to deliver the required gradient profile to the column.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 1999},

  month        = {Fri Jan 01 00:00:00 EST 1999}

}

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