The separated air-acetylene flame has been applied to atomic absorption spectroscopy. A long path variable sensitivity apparatus was developed which was stable, gave low background absorbances and enabled a number of elements to be determined with high sensitivity and reproducibility. The determination of mercury in the normal air-acetylene absorption flame by atomic-absorption spectroscopy was investigated and an explanation is offered for the variation in sensitivity which may be obtained under different circumstances. Beryllium has been determined by atomic thermal emission and atomic fluorescence spectroscopy in the separated nitrous oxideacetylene flame and the effects of a range of interferences investigated. An intense and stable microwave excited electrodeless discharge tube was developed as a source for the atomic fluorecence spectroscopy of beryllium. The atomic thermal emission spectra of the rare earths in the separated nitrous oxide-acetylene flame have been obtained and the possibility of determining the rare earths in this flame by atomic thermal emission spectroscopy investigated. A nitrous oxide-acetylene / air-acetylene burner of improved design suitable for separating or sheathing has been produced and tested. In the final. chanter some conclusions are drawn from the work which has been carried out and suggestions for increasing the sensitivity and .extending the scope of atomic spectral methods of analysis are made.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:623045 |
| Date | January 1968 |
| Creators | Hingle, David Norman |
| Publisher | Imperial College London |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/10044/1/15874 |
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