Methods for sampling a liquid flow
First Claim
1. A method for sampling a liquid flow, comprising the steps of:
- (a) supplying a continuous liquid flow from a continuous flow fluid input source to a surface along a first flow path; and
(b) sampling the continuous liquid flow by performing an electric field-based technique to split off a sample droplet from a portion of the liquid flow, whereby the sample droplet is distinct from the liquid flow and controllable independently of the liquid flow, wherein the electric field-based technique is performed by providing a set of drive electrodes on the surface and selectively biasing the set of drive electrodes at an actuation potential, whereby the sample droplet is formed on one of the set of drive electrodes and remains in contact with a reference electrode present on the surface and set at a potential that is lower than the actuation potential, during the droplet formation process.
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Abstract
Methods for sampling a liquid flow are provided. The method includes supplying a continuous liquid flow from a continuous flow fluid input source to a surface along a first flow path. The method additionally includes sampling the continuous liquid flow by performing an electric field-based technique to split off a sample droplet from a portion of the liquid flow, whereby the sample droplet is distinct from the liquid flow and controllable independently of the liquid flow, wherein the electric field-based technique is performed by providing a set of electrodes on the surface and selectively biasing the set of electrodes, whereby the sample droplet is formed on one of the set of electrodes.
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Citations
15 Claims
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1. A method for sampling a liquid flow, comprising the steps of:
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(a) supplying a continuous liquid flow from a continuous flow fluid input source to a surface along a first flow path; and (b) sampling the continuous liquid flow by performing an electric field-based technique to split off a sample droplet from a portion of the liquid flow, whereby the sample droplet is distinct from the liquid flow and controllable independently of the liquid flow, wherein the electric field-based technique is performed by providing a set of drive electrodes on the surface and selectively biasing the set of drive electrodes at an actuation potential, whereby the sample droplet is formed on one of the set of drive electrodes and remains in contact with a reference electrode present on the surface and set at a potential that is lower than the actuation potential, during the droplet formation process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for sampling a liquid flow, comprising the steps of:
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(a) supplying a liquid flow from a liquid flow fluid input source to a surface along a first flow path; and (b) sampling the continuous liquid flow by performing an electric field-based technique to split off a sample droplet from a portion of the liquid flow, whereby the sample droplet is distinct from the liquid flow and controllable independently of the liquid flow, wherein the electric field-based technique is performed by providing a set of drive electrodes on the surface and selectively biasing the set of drive electrodes at an actuation potential, whereby the sample droplet is formed on one of the set of drive electrodes and remains in contact with a reference electrode present on the surface and set at a ground potential, a nominal potential, or another potential that is lower than the actuation potential.
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Specification