Automated determination of sulfur(IV) using the Schiff reaction
Journal Article
·
· Anal. Chem.; (United States)
The recent modification of the Schiff reaction by Dasgupta et al. to determine S(IV) in aqueous solution is an improvement over the generally used West-Gaeke technique. The improvements by Dasgupta et al. include the removal of the mercuric chloride fixing solution, improvement in sensitivity, and unambiguous analysis of S(IV) bound as the formaldehyde adduct, hydroxymethanesulfonic acid (HMSA). The latter is important since Kok et al. have found that the HMSA is resistant to hydrogen peroxide oxidation. In measurement of Southern California cloud water, micromolar concentrations of S(IV) and hydrogen peroxide (H/sub 2/O/sub 2/) have been found to coexist. The original studies by Dasgupta et al. oriented the analytical technique to the analysis of SO/sub 2/ in the gas phase. In this paper the technique is adapted for automated analysis using the Technicon segmented flow system. The reagent concentrations are optimized for the analysis of S(IV) in cloud and precipitation samples. 7 references, 2 figures.
- Research Organization:
- National Center for Atmospheric Research, Boulder, CO
- OSTI ID:
- 5873333
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:11; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
AIR POLLUTION
AIR POLLUTION MONITORS
AQUEOUS SOLUTIONS
ATMOSPHERIC PRECIPITATIONS
CHEMICAL ANALYSIS
CLOUDS
DATA
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MIXTURES
MONITORS
NONMETALS
NUMERICAL DATA
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
SPECTRA
SPECTROSCOPY
SULFUR
400104* -- Spectral Procedures-- (-1987)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
AIR POLLUTION
AIR POLLUTION MONITORS
AQUEOUS SOLUTIONS
ATMOSPHERIC PRECIPITATIONS
CHEMICAL ANALYSIS
CLOUDS
DATA
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MIXTURES
MONITORS
NONMETALS
NUMERICAL DATA
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
SPECTRA
SPECTROSCOPY
SULFUR