Patent ID: 7404932

Claim:
A solid-phase nano extraction (SPNE) device for extracting a sample, comprising: an extraction tube with an inner surface having a nanostructure with high specific surface area; an outer tube, wherein the extraction tube is fixed in the outer tube and extends out from a front end of the outer tube; a sealing piston, which is accommodated in the front end inside the outer tube to form an airproof space with the outer tube, the airproof space being in communication with the extraction tube; and a pushing component, which pushes against the sealing piston from the rear end of the outer tube to push and pull the sealing piston and thereby changes the size of the airproof space to produce a pressure difference, which drives the sample into the extraction tube; wherein an airproof space between the sealing piston and the outer tube reduces as the pushing component pushes the sealing piston, and the airproof space between the sealing piston and the outer tube increases as the pushing component releases the sealing piston, the pressure in the airproof space is thus smaller than the ambient space of the extraction tube, thereby driving the sample into the extraction tube.