Nebulizer and analysis equipment

Patent metadata

Field	Value
Publication number	US-9384956-B2
Application number	US-201214367944-A
Country	US
Kind code	B2
Filing date	Oct 4, 2012
Priority date	Dec 22, 2011
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A nebulizer characterized in being provided with: an inner tube, which is disposed coaxially with an outer tube in which a nebulizing outlet is formed and which, together with the outer tube, forms a gas channel therebetween; a sample channel, which is formed inside the inner tube and through which a liquid sample to be nebulized flows; and a reticular membrane disposed with a gap from the sample outlet that is formed at one end of the inner tube and in which multiple holes, through which liquid sample drops flowing out from the sample outlet pass along with a gas, are formed. Using the nebulizer, the particle size of the nebulized liquid droplets can be made uniformly fine over a broad range of sample liquid flow volumes while retention of sample liquid in the nebulizer is reduced.

First claim

The invention claimed is:

1. A nebulizer, comprising:
a cylindrical outer tube, with a nebulizing outlet formed at one end of the outer tube;
a cylindrical inner tube arranged in the outer tube and aligned coaxially therewith, to form a gas flow channel and a sample flow channel, the gas flow channel defined between the inner and outer tubes and the sample flow channel defined by the inner tube; and
a mesh component, arranged and supported at the nebulizing outlet, with a plurality of holes for a liquid sample that flows out of the sample flow channel and is to be nebulized by a nebulizing gas into liquid droplets to pass through along with the nebulizing gas.

2. The nebulizer according to claim 1 , comprising the mesh component, which is woven with fibers, and has pores formed by the clearance among the fibers.

3. The analysis equipment, comprising:
the nebulizer as described in claim 1 ;
a plasma source, which is supplied with nebulized sample in separated components nebulized by the nebulizer, and is designed to introduce the sample into plasma; and
an analyzer, which analyzes the sample in plasma state.

4. The nebulizer according to claim 1 , wherein a cross section of the gas flow channel is a ring-shape extending in an axial direction.

5. The nebulizer according to claim 1 , wherein the liquid sample is introduced to the nebulizing outlet at the sample outlet.

Assignees

• Nat Inst Of Advanced Ind Scien
• S T Japan Inc
• S T Japan Inc

Inventors

• Inagaki Kazumi
• Fujii Shin-Ichiro
• Takatsu Akiko
• Chiba Koichi
• Nakagawa Takao
• Abe Masaaki
• Kitagawa Nobuyoshi
• Nakagawa Yosuke

Classifications

• G01J3/443

  Emission spectrometry · CPC title

• H01J49/105 Primary

  using high-frequency excitation, e.g. microwave excitation, Inductively Coupled Plasma [ICP] · CPC title

• H01J49/045

  with means for using a nebulising gas, i.e. pneumatically assisted · CPC title

• B05B7/0416

  with arrangements for mixing one gas and one liquid · CPC title

• G01N21/714

  Sample nebulisers for flame burners or plasma burners (nebulizers per se B05B) · CPC title