| dc.contributor.author | Arriaga, Edgar A. | en_US |
| dc.date.accessioned | 2014-10-21T12:34:37Z | |
| dc.date.available | 1990 | |
| dc.date.issued | 1990 | en_US |
| dc.identifier.other | AAINN64386 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/55172 | |
| dc.description | The Zeeman effect which causes splitting of atomic lines has been applied in atomic absorption spectroscopy to correct for background absorption. In this study, two aspects of Zeeman background correction were investigated: (i) Fourier analysis of the response of the instruments using a.c. magnetic fields; (ii) application to discharge cells used as atomisers operated at atmospheric pressure. | en_US |
| dc.description | Fourier analysis was applied to study the profiles transmitted by hollow-cathode lamps surrounded by a.c. fields (Faraday configuration). Self-absorption (and its frequency shift) inside the lamp affected the amplitudes of the first and second harmonics. The following lines were explored: 585.2 nm Ne, 377.7 nm Ne, 670.8 nm Li, and 285.2 nm Mg. | en_US |
| dc.description | Another application of the Fourier analysis was in study of line overlap of absorbing species experiencing an a.c. field (Voigt configuration). The d.c. term, the first harmonic and the second harmonic (or their ratios) depended on concentration and were selective. The line overlap of Pt and Fe at 271.9 nm and the isotopic overlap of $\sp6$Li and $\sp7$Li at the 670.8 nm are reported. | en_US |
| dc.description | Application of Zeeman background correction to discharges operating at atmospheric pressure was feasible. The use of the Faraday configuration imposed some limitations in design; the Voigt configuration was applied to metallic Al, Cd, Co, Cr, Cu, Fe, Pb, Mg, Ni, Ag, and Zn atomised directly, and to Ag and Pb solutions. The detection limit of the system for Ag and Pb was estimated from indirect determination of the amounts of these metals deposited on the electrode prior to the atomisation step. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 1990. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Chemistry, Analytical. | en_US |
| dc.subject | Physics, Atomic. | en_US |
| dc.title | Topics in the application of the Zeeman effect. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
