Concentric micro-nebulizer for direct sample insertion

Patent · Tue Mar 11 04:00:00 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 University, Ames, IA (US)
• 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

/219/239/315/356/
05
annular
annulus
below
concentric
concentric micro-nebulizer
concentric tubes
connected
connection
dead
dead volume
direct
established
extending
extending upwardly
forming
gas
including
inner
inner tube
insertion
introducing
liquid
liquid sample
liquid samples
liquid solvent
method
micro-nebulizer
microliters
nebulizer
orifice
outer
outer concentric
outer tube
outer tubes
plasma
plasma gas
plasma torch
positioned
sample
samples
slightly
solvent
source
spacing
therebetween
torch
torch including
tube
tube connected
tubes
tubes extend
tubes extending
upwardly
volume