||Electrochemical analysis of sulfidic and amine odorants /
Nwankwo, Jerry N. ;
||City Coll., New York. Dept. of Chemistry.;Environmental Sciences Research Lab., Research Triangle Park, N.C.
|| Environmental Sciences Research Laboratory, Office of Research and Development, Environmental Protection Agency,
Electrolytic analysis ;
Organic sulfides ;
Gas analysis ;
Electrolytic cells ;
Oxidation reduction reactions ;
Air pollution ;
Industrial wastes ;
Combustion products ;
Exhaust emissions ;
Measuring instruments ;
Air pollution detection ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||viii, 37 pages : illustrations ; 28 cm.
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.
Includes bibliographical references (page 36). Microfiche.