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

Journal Article · Mon Sep 01 00:00:00 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), Vol. 58:11, Issue 11
• Country of Publication: United States
• Language: English

Related Subjects

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