Multielement detection limits and sample nebulization efficiencies of an improved ultrasonic nebulizer and a conventional pneumatic nebulizer in inductively coupled plasma-atomic emission spectrometry
Two important aspects of the analytical performance of a newly developed ultrasonic nebulizer and a specially designed pneumatic nebulizer have been compared for use in inductively coupled plasma--atomic emission spectroscopy (ICP-AES). The ultrasonic nebulizer, when combined with a conventional aerosol desolvation apparatus, provided an order of magnitude or more improvement in simultaneous multielement detection limits as compared to those obtained when the pneumatic nebulizer was used either with or without desolvation. Application of a novel method for direct measurement of the overall efficiency of nebulization to the two systems showed that an approximately tenfold greater rate of sample delivery to the plasma torch was primarily responsible for the superior detection limits afforded by the ultrasonic nebulizer. A unique feature of the ultrasonic nebulizer described is the protection against chemical attack which is achieved by completely enclosing the transducer in an acoustically coupled borosilicate glass cylinder. Direct sample introduction, convenient sample change, and rapid cleanout are other important characteristics of the system which make it an attractive alternate to pneumatic nebulizer systems.
- Research Organization:
- Iowa State Univ., Ames
- OSTI ID:
- 7318330
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 49:4; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400104* -- Spectral Procedures-- (-1987)
ALUMINIUM
ARSENIC
CADMIUM
CHEMICAL ANALYSIS
CHROMIUM
COBALT
COPPER
DESIGN
EFFICIENCY
ELEMENTS
EMISSION SPECTROSCOPY
IRON
LEAD
MANGANESE
METALS
MOLYBDENUM
MULTI-ELEMENT ANALYSIS
NICKEL
PERFORMANCE
REFRACTORY METALS
SAMPLING
SELENIUM
SEMIMETALS
SPECTROSCOPY
TRANSITION ELEMENTS
VANADIUM
ZINC