Determination of aqueous bromide, iodide, and chloride with pneumatic and ultrasonic nebulization into a helium microwave-induced plasma
A helium microwave-induced plasma (He-MIP) was investigated for the determination of halides in aqueous solutions. The plasma was operated at 2450 MHz and 500 W. The optimum plasma gas flow rate was 21 L/min. A modified He-MIP torch provides greater mechanical stability and more efficient analyte-plasma contact than that of the earlier design presented by this group. Sample nebulization was accomplished with a MAK pneumatic (PN) system (with and without desolvation) and an ultrasonic (USN) system (with desolvation). Detection limits with USN were as follows: Cl, 0.4 mg/L; Br, 3 mg/L; and I, 0.8 mg/L. Detection limits with PN (without desolvation) were as follows: Cl, 2 mg/L; Br, 60 mg/L; and I, 7 mg/L. The interference effects of selected metals were examined and found to be moderate with pneumatic nebulization and significant with ultrasonic nebulization.
- Research Organization:
- Northern Illinois Univ., DeKalb
- OSTI ID:
- 7224401
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:14; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
AQUEOUS SOLUTIONS
ATOMIZATION
BROMIDES
BROMINE COMPOUNDS
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
ELEMENTS
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUIDS
GASES
HALIDES
HALOGEN COMPOUNDS
HELIUM
INFORMATION
INTERFERING ELEMENTS
IODIDES
IODINE COMPOUNDS
MIXTURES
NONMETALS
NUMERICAL DATA
PLASMA
QUANTITATIVE CHEMICAL ANALYSIS
RARE GASES
SOLUTIONS
SPECTROSCOPY
TRACE AMOUNTS