Generation of a helium inductively coupled plasma in a low-gas-flow torch

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00124a050· OSTI ID:5345100

Chan, S K; Van Hoven, R L; Montaser, A

In an earlier communication the authors reported the generation of three types of helium inductively coupled plasmas (He ICP) at atmospheric pressure by using modified conventional torches: the hollow He ICP, the filament-type He ICP, and the annular He ICP. Preliminary results indicated that the annular He ICP was capable of exciting elements such as Cl and Br, which possess high excitation energies. Atomic emission detection limits measured for aqueous chloride and bromide solutions were improved by more than 1 order of magnitude, as compared to the results obtained from the Ar ICP. In the present study, the authors report on the design and evaluation of a new demountable, low-gas-flow torch for generating an annular He ICP at atmospheric pressure. For the new design, the total He gas flow has been reduced by a factor of 7 as compared to their previous work, and the procedure for the formation of the plasma has been simplified significantly to a one-step plasma generation. Detection limits of aqueous bromide obtained at Br I 827.24 nm are also reported, using a photodiode array detector.

• Research Organization: George Washington Univ., Washington, DC
• DOE Contract Number: AS05-84ER13172
• OSTI ID: 5345100
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Journal Issue: 11 Vol. 58:11; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
AQUEOUS SOLUTIONS
BROMIDES
BROMINE COMPOUNDS
DATA
DESIGN
DISPERSIONS
ELEMENTS
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HELIUM
INFORMATION
MEASURING INSTRUMENTS
MIXTURES
NONMETALS
NUMERICAL DATA
OPTICAL SPECTROMETERS
PERFORMANCE
PLASMA
RARE GASES
SIGNAL-TO-NOISE RATIO
SOLUTIONS
SPECTROMETERS
SPECTROSCOPY