Determination of part-per-trillion levels of sulfur dioxide in humid air

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

DOI:https://doi.org/10.1021/ac00126a024· OSTI ID:5109759

Thornton, D C; Driedger, III, A R; Bandy, A R

Measurement of low part-per-trillion levels of sulfur dioxide by chromatographic techniques requires cryogenic preconcentration. To prevent loss of sulfur dioxide in the cotrapped water when sampling humid ambient air, they have used tubing made of Nafion perfluorinated membrane to dry the sampled air at flow rates of 0.25-1.0 L/min. The lower limits of detection (LLD) on polyphenyl ether/Chromosorb T columns depend on column length, sample volume, and base line chromatogram noise. For a 3-L sample collected in 3 min the LLD is 13 parts per trillion by volume for a 6-m column with peak resolution to the base line from interfering compounds in ambient air.

• Research Organization: Drexel Univ., Philadelphia, PA
• OSTI ID: 5109759
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:13; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR POLLUTION
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
DRYING
EXPERIMENTAL DATA
FLUIDS
GAS CHROMATOGRAPHY
GASES
HUMIDITY
INFORMATION
MEMBRANES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLE PREPARATION
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TRACE AMOUNTS