Colorimetric determination of atmospheric sulfur dioxide using 1,3,5-trinitrobenzene

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

DOI:https://doi.org/10.1021/ac00127a082· OSTI ID:6953981

Suzuki, Y; Imai, S

The pararosaniline method has been widely used for colorimetric determination of sulfur dioxide in the atmosphere because of its simplicity, sensitivity, and specificity. However, analyses must be carried out carefully with close attention to temperature, pH, and dye purity. 1,3,5-trinitrobenzene (TNB) forms an addition complex (I) with sulfite in a dimethyl sulfoxide (Me/sub 2/SO)-water mixture to give a highly colored solution. The equilibrium constant for the formation of I is at least one hundred times greater in an aqueous solution containing 70% (v/v) Me/sub 2/SO than in water. Since this reaction gives rapid and stable color development with high absorbance and the blank, attributable to TNB, is not observed, sulfur dioxide in the atmosphere is analyzed with a Me/sub 2/SO-water system containing TNB.

• Research Organization: Environmental Pollution Control Center of Kobe City, Hyogo, Japan
• OSTI ID: 6953981
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
AIR
ALCOHOLS
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DISPERSIONS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROXY COMPOUNDS
INFORMATION
METHANOL
MIXTURES
NITRO COMPOUNDS
NITROBENZENE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
SPECTROSCOPY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES