Concentric micro-nebulizer for direct sample insertion

Patent · Tue Mar 11 00:00:00 EST 1986

OSTI ID:865786

Fassel, Velmer A ^[1]; Rice, Gary W ^[2]; Lawrence, Kimberly E ^[1]

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1. Ames, IA
2. Nevada, IA

A concentric micro-nebulizer and method for introducing liquid samples into a plasma established in a plasma torch including a first tube connected to a source of plasma gas. The concentric micro-nebulizer has inner and outer concentric tubes extending upwardly within the torch for connection to a source of nebulizer gas and to a source of liquid solvent and to a source of sample liquid. The inner tube is connected to the source of liquid solvent and to the source of sample liquid and the outer tube is connected to the source of nebulizer gas. The outer tube has an orifice positioned slightly below the plasma when it is established, with the inner and outer tubes forming an annulus therebetween with the annular spacing between the tubes at said orifice being less than about 0.05 mm. The dead volume of the inner tube is less than about 5 microliters.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4575609
• Application Number: 06/586,611
• OSTI ID: 865786
• Country of Publication: United States
• Language: English

Related Subjects

concentric
micro-nebulizer
direct
sample
insertion
method
introducing
liquid
samples
plasma
established
torch
including
tube
connected
source
gas
inner
outer
tubes
extending
upwardly
connection
nebulizer
solvent
orifice
positioned
slightly
below
forming
annulus
therebetween
annular
spacing
05
dead
volume
microliters
liquid sample
tube connected
liquid samples
tubes extend
tubes extending
dead volume
inner tube
plasma torch
liquid solvent
outer tube
plasma gas
concentric tubes
outer tubes
outer concentric
extending upwardly
concentric micro-nebulizer
torch including
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