Rotating arc direct current plasma as an emission excitation source

Journal Article · Mon Apr 01 00:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00281a015· OSTI ID:5651305

Hara, L Y; Parsons, M L

A rotating arc direct current plasma system has been developed and evaluated as a spectroscopic excitation source for atomic emission spectrometry. It operates by forcing a dc arc to rotate reproducibly on the surface of a graphite anode disk by introducing argon gas tangentially to the anode. Sample aerosol is introduced into the plasma concentrically through an orifice in the graphite disk. Spectroscopic measurements are made directly in the current carrying region of the plasma. The design of this device was thoroughly examined and each parameter affecting its analytical performance was evaluated. The performance figures of merit for this device showed linearity over 5 orders of magnitude. The detection limits were comparable to a commercially available direct current plasma for several elements. While further work is required to completely characterize this device, this study shows that it has potential for becoming an alternate excitation source. 16 references, 3 figures, 5 tables.

• Research Organization: Arizona State Univ., Tempe
• OSTI ID: 5651305
• Journal Information: Anal. Chem.; (United States), Vol. 57:4
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CALCIUM
EMISSION SPECTROSCOPY
COPPER
MAGNESIUM
OPTICAL SPECTROMETERS
PERFORMANCE
SEDIMENTS
QUANTITATIVE CHEMICAL ANALYSIS
SODIUM
WATER
ANODES
DESIGN
DIRECT CURRENT
ELECTRIC ARCS
EXPERIMENTAL DATA
FRESH WATER
GROUND WATER
PLASMA
PLASMA PRODUCTION
ROTATION
TRACE AMOUNTS
ALKALI METALS
ALKALINE EARTH METALS
CHEMICAL ANALYSIS
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRODES
ELEMENTS
HYDROGEN COMPOUNDS
INFORMATION
MEASURING INSTRUMENTS
METALS
MOTION
NUMERICAL DATA
OXYGEN COMPOUNDS
SPECTROMETERS
SPECTROSCOPY
TRANSITION ELEMENTS
400104* - Spectral Procedures- (-1987)
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
510200 - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)