Glass surface deactivants for sulfur-containing gases
In gas chromatographic technique for measuring reduced sulfur-containing gases in biogenic air fluxes, the major problem seemed to be the irreversible adsorption of the polar sulfur compounds on the glass surfaces of the cryogenic sampling traps. This article discusses the comparative degrees of Pyrex glass surface passivation for over 25 chemical deactivants and their related pretreatment procedures. Since H/sub 2/S was discovered to be the sulfur compound with a consistently lower recovery efficiency than COS, CH/sub 3/SH, CH/sub 3/SCH, CS/sub 2/ or CH/sub 3/SSCH/sub 3/, the percent recovery for H/sub 2/S was employed as the indicator of effectiveness for the various deactivation treatments. Tables are presented summarizing the mean H/sub 2/S recoveries for chlorosilane deactivants and for the mean H/sub 2/S recoveries for different pyrex surface pretreatments with an octadecyltrialkoxysilane deactivation. The general conclusion of this investigation is that the relative degree of passivation for glass surfaces by present deactivation techniques is dependent on the types of analyzed compounds and the nature of the glass surface.
- Research Organization:
- Univ. of Idaho, Moscow
- OSTI ID:
- 6790835
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 52:12; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
AIR
ALCOHOLS
AMIDES
AROMATICS
CARBON COMPOUNDS
CARBONATES
CARBOWAX
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
DEACTIVATION
ELEMENTS
FLUIDS
GAS CHROMATOGRAPHY
GASES
GLASS
GLYCOLS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
IMINES
NONMETALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYETHYLENE GLYCOLS
POLYMERS
SEPARATION PROCESSES
SILANES
SILICON COMPOUNDS
SILOXANES
SULFIDES
SULFUR
SULFUR COMPOUNDS
SURFACE TREATMENTS
WAXES