Characteristics of the Background Emission Spectrum from a Miniature ICP.
Abstract
The spectral characteristics of the background radiation emitted by a miniature inductively coupled plasma are carefully examined and methods for reducing undesirable features discussed. Also investigated are the influences that several important experimental parameters, such as coolant tube length, rf power and coolant and nebulizer gas flow rates have on plasma badkground emission. The complex nature of the mini-ICP's background emission spectrum indicates that careful line selection criteria and background correction procedures be employed. Extending a torch's coolant tube to the bottom of the region being ovserved in the plasma proved to be the most effective method for reducing inexpedient spectral features. Acute changes in background emission levels woth rf power and nebulizer gas flow rates indicate the need for careful control of these parameters to achieve high precision. Importantly, a comparison between mini-ICP and conventional ICP spectra reveals the basic similarity of the two sources. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 26, 1979
- Accession Number
- ADA077876
Entities
People
- Gary M. Hieftje
- R. N. Savage
Organizations
- Indiana University