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Method for confining alternating current electric field of charged particles in solution

A technology of charged particles and alternating electric field, applied in the field of enrichment of charged particles, can solve problems such as no related reports

Inactive Publication Date: 2011-08-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the experimental method of trapping charged particles in solution by alternating electric field has not been reported so far.

Method used

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  • Method for confining alternating current electric field of charged particles in solution
  • Method for confining alternating current electric field of charged particles in solution
  • Method for confining alternating current electric field of charged particles in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Quadrupole electric field traps MnO in aqueous solution 4 - ion

[0033] Cut two plexiglass sheets with a diameter of 110mm and a thickness of 3mm, control the distance between the two plexiglass sheets to 2mm, and place two sets of graphite electrodes with a diameter of 6mm at positions 20mm and 33mm away from the center point, and the two sets of electrodes are perpendicular to each other; Fill the board with 0.05M H 2 SO 4 solution, and place it in a watch glass to keep it level; inject an appropriate amount of MnO into the center of the upper plexiglass plate 4 - ions; apply V between two sets of electrodes p-p =60V, f=520kHz AC electric field, MnO can be observed 4 - Ions are imprisoned in such as figure 1 diamond-shaped area, and keep it for more than ten minutes. It shows that the quadrupole AC electric field prevents the thermal diffusion of ions and achieves the purpose of trapping ions.

Embodiment 2

[0034] Example 2: Octopole electric field trapping MnO in aqueous solution 4 - ion

[0035]Cut two plexiglass sheets with a diameter of 110mm and a thickness of 3mm, control the distance between the two plexiglass sheets to 2mm, and place eight stainless steel electrodes with a diameter of 5mm at a position 25mm away from the center point. The angle between the electrodes is 45°, and the spaced electrodes Connected as a group; fill 0.05M H between the plexiglass plates 2 SO 4 solution, and place it in a watch glass to keep it level; inject an appropriate amount of MnO into the center of the upper plexiglass plate 4 - ions; apply V between two sets of electrodes p-p =30V, f=520kHz AC electric field, MnO can be observed 4 - Ions are imprisoned in such as figure 2 The octagonal region, and most of the ions are pushed away from the electrode and move to the center of the electric field, realizing the MnO 4 - Ion enrichment function. It shows that the octopole AC electr...

Embodiment 3

[0036] Embodiment 3: phenanthroline iron ion (Fe(phen) 3 2+ ) spectral concentration tracking

[0037] Cut two plexiglass sheets with a diameter of 110mm and a thickness of 3mm, control the distance between the two plexiglass sheets to 2mm, and place eight stainless steel electrodes with a diameter of 5mm at a position 25mm away from the center point. The angle between the electrodes is 45°, and the spaced electrodes Connected as a group; fill 0.4M NaCl solution between the plexiglass plates, use Ocean Optics USB2000 for ionization + Fiber optic spectrometer for Fe(phen) 3 2+ Concentration tracking of the ion trapping process. image 3 It shows that after the AC electric field is applied, according to the direction of the arrow, the Fe(phen) in the center of the electric field 3 2+ Ion absorbance gradually increased from 0.207 to 0.628, Fe(phen) 3 2+ The ion concentration rose to 3 times the initial value. Figure 4 Then it shows that the central area Fe(phen) of two ...

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Abstract

The invention discloses a method for confining an alternating current electric field of charged particles in a solution, and relates to enrichment of the charged particles. The method comprises the following steps of: using two pieces of insulating boards; controlling a space between the two pieces of the insulating boards to be 0.5-3 mm; placing at least n electrodes at a circumferential equal included angle space position, wherein the n is an even number of at least 4; connecting the spaced electrodes into a group of electrodes, wherein the same group of the electrodes are in the same circle radius, and the distributed circle radiuses of the two groups of the electrodes are equal or in a 0.707-time relationship; injecting supporting electrolyte between the two pieces of the insulating boards; injecting a confined charged particle solution in the symmetrical centre of the electrodes; and applying alternating current on the two groups of the electrodes. An experiment shows that the method is effective to the ions of cations and anions, charged colloid, nanometer particles, protein, heavy metals and the like, namely under the action of the multi-pole hyperboloid alternating current electric field of the solution, the charged particles of the solution can overcome thermal diffusion to be confined to a specific area, and further move and gather towards the center of the electric field.

Description

technical field [0001] The invention relates to the enrichment of charged particles, in particular to an AC electric field trapping method for charged particles in solution. Background technique [0002] The motion of charged particles under the action of an electric field is very important. Russian physicist Pe H ce ([1] Reuss, F.FMem.Soc.Imperiale Naturalistes de Moscow, 2, 327 1809) studied the movement of charged particles in solution under a DC electric field, and first discovered the phenomenon of electrophoresis; Stephen ([2] ] W.E.Stephens, Bull.Am.phys.Soc., 21, 22 (1946)) studied the movement phenomenon of charged particles in vacuum under a DC electric field, and proposed a time-of-flight mass spectrometer; Paul and Steinwedel ([3] W.Paul, H Steinwedel, Ger.Pat.944 900 (1956)) studied the movement of charged particles in vacuum under AC electric field, innovatively developed ion trap mass spectrometry, and won the 1989 Nobel Prize in Physics. However, the experi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08
Inventor 林水潮周志有郑南峰黄荣彬郑兰荪
Owner XIAMEN UNIV
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