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An Investigation of the Concentration Dependence and Response to Analyte Mixtures of Carbon Black/Insulating Organic Polymer Composite Vapor Detectors

Severin, Erik J. and Doleman, Brett J. and Lewis, Nathan S. (2000) An Investigation of the Concentration Dependence and Response to Analyte Mixtures of Carbon Black/Insulating Organic Polymer Composite Vapor Detectors. Analytical Chemistry, 72 (4). pp. 658-668. ISSN 0003-2700. http://resolver.caltech.edu/CaltechAUTHORS:20170124-153339196

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Abstract

The responses relative to an air background of carbon black/polymer composite vapor detectors have been determined as a function of the concentration of a homologous series of alcohols (n-C_nH_(2n+1)OH, 1 ≤ n ≤ 8), a homologous series of alkanes (n-C_nH_(2n+2), 5 ≤ n ≤ 10 and n = 12, 14), and a set of diverse solvent vapors. In all cases, the steady-state relative differential resistance responses, ΔR/R_b, of the carbon black/polymer composite vapor detectors were well-described by a linear relationship with respect to the analyte partial pressure, at least over the tested concentration range (P/P° = 0.005−0.03, where P° is the vapor pressure of the analyte). When two vapors in air were simultaneously presented to the detectors, the ΔR/R_b response, relative to an air background, was the sum of the ΔR/R_b values obtained when each analyte was exposed separately to the carbon black/polymer composite detectors under study. Similarly, when an analyte was exposed to the detectors on top of a background level of another analyte, the ΔR/R_b values of the array of detectors were very close to those obtained when the test analyte was exposed to the detectors only in the presence of background air. The initial training requirements from the array response output data of such detectors are minimized because the ΔR/R_b response pattern produced by the analyte of concern can be associated uniquely with that odor, under the conditions explored in this work.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ac9910278DOIArticle
http://pubs.acs.org/doi/abs/10.1021%2Fac9910278PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/ac9910278Related ItemSupporting Information
ORCID:
AuthorORCID
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2000 American Chemical Society. Received 7 September 1999. Published online 21 January 2000. Published in print 1 February 2000. This work was supported by the National Aeronautics and Space Administration, the Army Research Office, the Defense Advanced Research Projects Agency, and the Department of Energy, B.J.D. acknowledges the Government of Canada for an NSERC 1967 Centennial Graduate Fellowship.
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Record Number:CaltechAUTHORS:20170124-153339196
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170124-153339196
Official Citation:An Investigation of the Concentration Dependence and Response to Analyte Mixtures of Carbon Black/Insulating Organic Polymer Composite Vapor Detectors Erik J. Severin, Brett J. Doleman, and Nathan S. Lewis Analytical Chemistry 2000 72 (4), 658-668 DOI: 10.1021/ac9910278
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73679
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Jan 2017 00:36
Last Modified:26 Jan 2017 00:36

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