| dc.contributor.author | Thurbide, Kevin Blain. | en_US |
| dc.date.accessioned | 2014-10-21T12:35:18Z | |
| dc.date.available | 1995 | |
| dc.date.issued | 1995 | en_US |
| dc.identifier.other | AAINN05236 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/55048 | |
| dc.description | For almost thirty years, gas chromatographers (GC) have praised the Flame Photometric Detector (FPD) for being a sensitive and selective analytical tool, and condemned it for suffering from response quenching in the presence of hydrocarbons. This study describes the construction and characterization of a large, low-temperature, fuel-rich flame reactor designed for studying the survival rates of organic compounds in the flame and the assumedly related quenching processes in the FPD. Results show that the traditional diffusion flame discriminates, in terms of decomposition, against the carbon number of a series of introduced n-alkanes, while a premixed flame does not. As well, a diffusion flame decomposes heterocyclic organic compounds much more than their pure hydrocarbon equivalents. | en_US |
| dc.description | Subsequent studies of premixed hydrogen and air flames, in small glass jets, led to the discovery of an elongated "glow", previously unknown, and presently referred to as a "reactive flow". Current research qualifies this phenomenon for analytical use as a new GC sensor: the Reactive Flow Detector (RFD). The RFD demonstrates elemental sensitivity that is about as good as, or better than, the FPD. As well, it operates under a single set of conditions and does not suffer from response quenching. The detector can also be modified for in-series Flame Ionization Detection (FID), whose sensitivity is only a factor of two lower than that of a comparable FID. The burner also gives rise to a singing flame which changes pitch in response to the chromatographic concentration profile of $\mu$g quantities of organic compounds. | en_US |
| dc.description | Thus, by performing several simultaneous roles, the Reactive Flow Detector offers GC a new method of analysis, which avoids the various impediments that have hampered the FPD's application and performance in the past. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 1995. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Chemistry, Analytical. | en_US |
| dc.title | New chemiluminescent methods in chromatographic detection. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
