Analytical and mechanistic studies of the chemiluminescence oxidation of hydroxy-containing compounds Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/4b29b902d

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  • This thesis is concerned with the development and use of routine analysis techniques based on chemiluminescence (CL) detection for: 1) ethanol in gin down to the 0.3% (v/v) level; 2) the antioxidants propyl gallate and BHA in lard to levels as low as 0.3 and 0.2 mg/L, respectively; 3) pyrogallol in hair dye with a detection limit of 0.7 mg/L; 4) vanillin in vanilla extract to a concentration as low as 0.5 mg/L. All these determinations are based on the oxidation of these hydroxy-containing compounds by permanganate in highly acidic solutions. Each technique is discussed in terms of optimization of experimental conditions, calibration curve and detection limit data, and application to real samples. In most cases, a solvent extraction separation step is required to reduce interference effects. The results of analyses of real samples are compared to those obtained with accepted analytical techniques. It is shown that CL is produced during the oxidation of most aliphatic alcohols and phenols by permanganate. The duration of the CL signal is correlated to the rate of oxidation and is generally much less for phenols than for aliphatic alcohols. The nature of the CL reaction for aliphatic compounds was investigated in some detail. Studies support the hypothesis that Mn(IV) is the species that attacks the alcohol to produce an excited intermediate. The reaction products acetaldehyde and acetic acid were detected and characterized as final products for the ethanol CL reaction by ¹H NMR, ¹³C NMR, and GC-MS.
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  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-06-17T16:18:35Z (GMT) No. of bitstreams: 1 VasquezdeMontalvoSocorroI1987.pdf: 1392472 bytes, checksum: b7cc5fe3adcc3e18458072168c9d3e39 (MD5)
  • description.provenance : Made available in DSpace on 2013-07-02T20:57:02Z (GMT). No. of bitstreams: 1 VasquezdeMontalvoSocorroI1987.pdf: 1392472 bytes, checksum: b7cc5fe3adcc3e18458072168c9d3e39 (MD5) Previous issue date: 1986-09-30
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  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2013-07-02T20:57:02Z (GMT) No. of bitstreams: 1 VasquezdeMontalvoSocorroI1987.pdf: 1392472 bytes, checksum: b7cc5fe3adcc3e18458072168c9d3e39 (MD5)

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