SYSTEM AND METHOD FOR LIQUID EXTRACTION ELECTROSPRAY-ASSISTED SAMPLE TRANSFER TO SOLUTION FOR CHEMICAL ANALYSIS

摘要

A system for sampling a surface includes a surface sampling probe comprising a solvent liquid supply conduit and a distal end, and a sample collector for suspending a sample collection liquid adjacent to the distal end of the probe. A first electrode provides a first voltage to solvent liquid at the distal end of the probe. The first voltage produces a field sufficient to generate electrospray plume at the distal end of the probe. A second electrode provides a second voltage and is positioned to produce a plume-directing field sufficient to direct the electrospray droplets and ions to the suspended sample collection liquid. The second voltage is less than the first voltage in absolute value. A voltage supply system supplies the voltages to the first electrode and the second electrode. The first electrode can apply the first voltage directly to the solvent liquid. A method for sampling for a surface is also disclosed.

主权项

1. A system for sampling a surface, comprising:
a surface sampling probe comprising a solvent liquid supply conduit and a distal end; a sample collector for suspending a sample collection liquid adjacent to the distal end of the surface sampling probe; a first electrode for providing a first voltage to solvent liquid at the distal end of the surface sampling probe, the first voltage producing a field sufficient to generate an electrospray at the distal end of the surface sampling probe; a second electrode for providing a second voltage, the second electrode being positioned to produce an electrospray plume directing field sufficient to direct electrosprayed droplets and ions at the distal end of the surface sampling probe to the suspended sample collection liquid, the second voltage being less than the first voltage in absolute value; and a voltage supply system for supplying the voltages to the first electrode and the second electrode.