Determination of reduced sulfur compounds in aqueous solutions using gas chromatography flame photometric detection
A method for simultaneous analysis of hydrogen sulfide (H/sub 2/S), methyl mercaptan (CH/sub 3/SH), carbon disulfide (CS/sub 2/), dimethyl sulfide (DMS, CH/sub 3/SCH/sub 3/), and dimethyl disulfide (DMDS, CH/sub 3/SSCH/sub 3/) in aqueous solutions is described. The reduced sulfur compounds are released from the aqueous sample (50-200 mL) by purging with N/sub 2/ and then trapped cryogenically in a U-shaped sample tube with liquid nitrogen. The sample tube was sealed with end caps and placed in a portable freezer. Under stable conditions in the laboratory, the sulfur compounds are released by controlled heating and injected onto packed column gas chromatograph with a flame photometric detector. The precision of the method for environmental samples was better than +/- 5% for all compounds except for H/sub 2/S, for which the precision was +/- 25%. The detection limits for H/sub 2/S, CH/sub 3/SH, CS/sub 2/, DMS, and DMDS were 1, 0.6, 0.2, 0.2, and 0.4 ng x L/sup -1/ S, respectively, in a 200-mL natural sample. Analyses of environmental samples have been successfully performed with the described method.
- Research Organization:
- Univ. of Stockholm (Sweden)
- OSTI ID:
- 6743301
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:17; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
DISPERSIONS
EXPERIMENTAL DATA
FLAME PHOTOMETRY
GAS CHROMATOGRAPHY
HYDROGEN COMPOUNDS
INFORMATION
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOTOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
SEAWATER
SEPARATION PROCESSES
SOLUTIONS
SULFUR COMPOUNDS
TRACE AMOUNTS
WATER