Thesis (MTech (Chemistry))--Peninsula Technikon, Cape Town, 1995 / An analytical method using Differential Pulse Anodic Stripping Voltammetry was
developed for determining trace quantities of Cu, Pb, Cd and Zn in airborne
particulate matter. The levels of the metallic pollutants were evaluated against
meteorological data.
Instrumental parameters and sample processing were optimised for determining
the metals in the concentration range 1 to 40 μg/l with a percentage relative
standard deviation (%RSD) less than 10%.
Airborne particulate matter was decomposed by heating in a mixture of
Hydrochloric and Sulphuric acids. Recovery studies were used to evaluate the
digestion procedure, in the absence of a suitable reference material. The
percentage recovery for the metals were between 95% and 100%. A total of 77
air samples were collected from January to December 1992, on the campus of the
Peninsula Technikon. The samples were collected over 24 hour periods by
filtration at a sampling rate of 20 liters per minute. The total average concentration
for the metals was 25.3μg/m³. . No Cd was detected in any of the samples.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:cput/oai:localhost:20.500.11838/743 |
| Date | January 1995 |
| Creators | Jahed, Mohammed Nazeem |
| Contributors | Crouch, A.M., Prof |
| Publisher | Peninsula Technikon |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | http://creativecommons.org/licenses/by-nc-sa/3.0/za/ |
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