Nano-spraying electrode as well as manufacturing method and application thereof

A production method and nano-spray technology, applied in the field of analytical chemistry, can solve the problems of cumbersome production process, unstable spray, short service life, etc., and achieve the effects of improving mass spectrometry sensitivity, reducing detection limit and long service life

Inactive Publication Date: 2012-06-27
SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of short service life, unstable spraying, cumbersome manufacturing process, and high cost of existing nanospray electrodes, the present invention provides a nanospray electrode w

Method used

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  • Nano-spraying electrode as well as manufacturing method and application thereof
  • Nano-spraying electrode as well as manufacturing method and application thereof
  • Nano-spraying electrode as well as manufacturing method and application thereof

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Embodiment

[0038] One, make the nanospray electrode of the present invention

[0039] a) Make the tip of the quartz capillary needle: cut off a quartz capillary with a length of 10-11 cm and an inner diameter of 50 μm, burn off the polyimide coating at one end for about 0.3-0.5 cm, and remove the polyimide coating with sandpaper One end of the capillary was ground into a symmetrical tip; then the tip was soaked in ethanol to remove the silicon particles on the tip, and placed for later use;

[0040] b) Making a conductive coating: cut the gold foil so that it is 1-2cm long and 0.1-0.3cm wide, and the thickness of the gold foil can be 0.1-8μm, preferably 0.12μm; pass the cut gold foil through the epoxy resin Adhered to the tip of the quartz capillary needle;

[0041] c) feed water or an organic solvent into the quartz capillary needle, and check whether the outlet is blocked to ensure that the tip is not blocked; the recommended organic solvent is methanol, acetonitrile or acetone, prefe...

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Abstract

The invention discloses a nano-spraying electrode with a quite simple manufacturing process as well as a manufacturing method and application thereof. The electrode is formed by a quartz-capillary spraying needle and a gold foil, wherein the gold foil is used as a conducting layer, and the gold foil is stuck to the tip surface of the quartz-capillary spraying needle through epoxy resin to form a conducting coating. The manufacturing method of the electrode comprises the following steps of: manufacturing the tip of the quartz-capillary spraying needle; and sticking the gold foil which is cut into a proper size to the tip surface of the quartz-capillary spraying needle through the epoxy resin. The nano-spraying electrode disclosed by the invention has a longer service life than the gilded quartz-capillary spraying needle, i.e. a commercialized gold electrode which is widely used at present; and long-time stable spray ionization can be obtained, the detecting sensitivity of a mass spectrum is improved, the detecting limit is lowered, and the obtained spectrogram reproducibility is good. The nano-spraying electrode not only can be applied to a nano-spraying mass-spectrum analyzing technology, but also can be used in the combined analyzing technology of a capillary electrophoresis or a capillary liquid chromatogram and the mass spectrum.

Description

technical field [0001] The invention relates to a nanospray electrode and its manufacturing method and application, in particular to a nanospray electrode using epoxy resin-coated gold foil as a conductive coating and its manufacturing method and application, belonging to the technical field of analytical chemistry . Background technique [0002] After the nanospray ionization (Nanoelectrospray ionization, NSI) was proposed, people have a great interest in the study of nanospray. Compared with the earlier electrospray ionization (Electrospray ionization, ESI), nanospray has unparalleled advantages: on the one hand, the flow rate is reduced to the range of nL / min, which is several orders of magnitude lower than that of electrospray, making the sample The dosage is greatly reduced, and the utilization efficiency of the sample is greatly improved, and the average signal of the mass spectrum can be obtained in a longer period of time; The sample can be aerosolized and then ion...

Claims

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Application Information

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IPC IPC(8): H01J49/16H01J9/02
Inventor 康经武张含智
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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