Nebulizer and analyzer

Patent metadata

Field	Value
Publication number	US-9520278-B2
Application number	US-201514597727-A
Country	US
Kind code	B2
Filing date	Jan 15, 2015
Priority date	Jan 21, 2014
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

An object is to mix multiple liquids sufficiently and then nebulize the mixed liquids while maintaining the nebulizing efficiency. A nebulizer includes a first inner tube disposed inside an outer tube and having therein a first sample passage through which a first liquid sample flows, a second inner tube disposed inside the outer tube in parallel with the first inner tube and having therein a second sample passage through which a second liquid sample flows, a membranous member disposed with a gap between the membranous member and sample outlets formed at respective ends of the inner tubes. The gap forms mixing space in which a gas passing through a gas passage converts the first and second liquid samples flowing out of the sample outlets into droplets and mixes the droplets and the membranous member has multiple holes through which the mixed liquid samples pass along with the gas.

First claim

What is claimed is:

1. A nebulizer comprising:
an outer tube having a nebulizing outlet at one end thereof;
a first inner tube disposed inside the outer tube and extending in an axis direction of the outer tube, wherein a gas passage through which a nebulizing gas flows is provided between the first inner tube and outer tube and wherein the first inner tube has therein a first sample passage through which a first liquid sample flows;
a second inner tube disposed inside the outer tube in parallel with the first inner tube, wherein a gas passage through which the nebulizing gas flows is provided between the second inner tube and outer tube, and wherein the second inner tube has therein a second sample passage through which a second liquid sample flows; and
a membranous member disposed at downstream ends of sample outlets in a transport direction of the first and second sample passages and disposed, such that a gap is provided between the membranous member and the sample outlets provided at respective ends of the first and second inner tubes,
wherein the gap provides a mixing space, in which the nebulizing gas passing through the gas passages converts the first and second liquid samples flowing out of the sample outlets into droplets and mixes the droplets to provide a mixed liquid sample,
wherein the nebulizing gas becomes turbulent in the mixing space to mix the droplets, and
wherein the membranous member has a plurality of holes through which the mixed liquid sample samples passes along with the nebulizing gas for nebulization.

2. The nebulizer of claim 1 , wherein a length of the gap between the sample outlets and the membranous member is set to a length which does not cause intermittent nebulizing of the mixed liquid samples or to a shorter length.

3. The nebulizer of claim 1 , wherein a sum of perimeter lengths of the holes of the membranous member is set to a length larger than a perimeter length of the nebulizing outlet.

4. The nebulizer of claims 1 ,
wherein the membranous member includes woven fibers, and
wherein the holes are gaps among the woven fibers.

5. An analyzer comprising:
the nebulizer of claim 1 ;
a plasma source configured to receive an aerosolized sample nebulized from the nebulizer, the aerosolized sample being a sample from which components have been separated, and to atomize or ionize the sample; and
a spectrometer configured to analyze the atomized or ionized sample.

Assignees

• Nat Inst Advanced Ind Science & Tech
• S T Japan Inc

Inventors

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

Classifications

• H01J49/105

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

• H01J49/045 Primary

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