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RECORD NUMBER: 49 OF 157

OLS Field Name OLS Field Data
Main Title Electrochemical analysis of sulfidic and amine odorants /
Author Nwankwo, Jerry N. ; Turk., Amos
Other Authors
Author Title of a Work
Turk, Amos
CORP Author City Coll., New York. Dept. of Chemistry.;Environmental Sciences Research Lab., Research Triangle Park, N.C.
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, Environmental Protection Agency,
Year Published 1976
Report Number EPA/600/2-76/021; EPA-R-802396
Stock Number PB-255 092
OCLC Number 53193642
Additional Subjects Electrolytic analysis ; Odors ; Amines ; Organic sulfides ; Gas analysis ; Electrolytic cells ; Oxidation reduction reactions ; Air pollution ; Concentration(Composition) ; Industrial wastes ; Combustion products ; Exhaust emissions ; Measuring instruments ; Air pollution detection ; Voltammetry ; Chronocoulometric analysis
Holdings
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Status
NTIS  PB-255 092 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation viii, 37 pages : illustrations ; 28 cm.
Abstract
Oxidation of odorous vapors at the anode of an electrochemical cell was studied as a promising approach to achieving instrumental analysis of odors. The technique of linear potential sweep cyclic voltammetry was used to investigate the oxidizability of several amines, sulfides, and their mixtures on platinum, gold, glassy-carbon, carbon paste, and graphite electrodes. Results of the analyses of individual amines showed that the ease of oxidation on a platinum electrolyte was: tertiary > secondary > primary. Results for runs conducted on mixtures containing combinations of primary, secondary, and tertiary amines indicated that separate current peaks were not obtained for the various amines. Instead, a composite peak was obtained for any given mixture. Results for sulfides using a platinum electrode indicated that allyl sulfide, n-butyl sulfide and tert-butylsulfide could be oxidized in acetonitrile solution with 0.1 M NaClO4 as supporting electrolyte. The order was: tert-butylsulfide > n-butylsulfide > allylsulfide. When amines and sulfides were mixed, a clear separation of the peaks was observed. The results indicate that it is possible to characterize a mixture of amines and sulfides by linear potential sweep cyclic voltammetry.
Notes
Includes bibliographical references (page 36). Microfiche.